From 023fa30280e561e9921a2c83138af4cac01068ab Mon Sep 17 00:00:00 2001
From: syuilo <4439005+syuilo@users.noreply.github.com>
Date: Sun, 22 Sep 2024 12:53:13 +0900
Subject: [PATCH] refactor/perf(backend): provide metadata statically (#14601)

* wip

* Update ReactionService.ts

* Update ApiCallService.ts

* Update timeline.ts

* Update GlobalModule.ts

* Update GlobalModule.ts

* Update NoteEntityService.ts

* wip

* wip

* wip

* Update ApPersonService.ts

* wip

* Update GlobalModule.ts

* Update mock-resolver.ts

* Update RoleService.ts

* Update activitypub.ts

* Update activitypub.ts

* Update activitypub.ts

* Update activitypub.ts

* Update activitypub.ts

* clean up

* Update utils.ts

* Update UtilityService.ts

* Revert "Update utils.ts"

This reverts commit a27d4be764b78c1b5a9eac685e261fee49331d89.

* Revert "Update UtilityService.ts"

This reverts commit e5fd9e004c482cf099252201c0c1aa888e001430.

* vuwa-

* Revert "vuwa-"

This reverts commit 0c3bd12472b4b9938cdff2d6f131e6800bc3724c.

* Update entry.ts

* Update entry.ts

* Update entry.ts

* Update entry.ts

* Update jest.setup.ts
---
 packages/backend/src/GlobalModule.ts          | 63 +++++++++++++++++-
 .../core/AbuseReportNotificationService.ts    | 12 ++--
 .../backend/src/core/AccountMoveService.ts    |  9 +--
 packages/backend/src/core/DriveService.ts     | 61 ++++++++---------
 packages/backend/src/core/EmailService.ts     | 43 ++++++------
 packages/backend/src/core/HashtagService.ts   | 12 ++--
 .../backend/src/core/NoteCreateService.ts     | 60 ++++++++---------
 .../backend/src/core/NoteDeleteService.ts     | 15 ++---
 .../backend/src/core/ProxyAccountService.ts   | 13 ++--
 .../src/core/PushNotificationService.ts       | 16 ++---
 packages/backend/src/core/ReactionService.ts  | 19 +++---
 packages/backend/src/core/RoleService.ts      | 10 ++-
 packages/backend/src/core/SignupService.ts    | 10 +--
 .../backend/src/core/UserFollowingService.ts  | 20 +++---
 packages/backend/src/core/WebAuthnService.ts  | 30 ++++-----
 .../src/core/activitypub/ApInboxService.ts    | 10 +--
 .../src/core/activitypub/ApResolverService.ts | 14 ++--
 .../core/activitypub/models/ApImageService.ts | 11 ++--
 .../core/activitypub/models/ApNoteService.ts  | 12 ++--
 .../activitypub/models/ApPersonService.ts     | 12 ++--
 .../src/core/chart/charts/federation.ts       | 19 +++---
 .../core/entities/InstanceEntityService.ts    | 16 +++--
 .../src/core/entities/MetaEntityService.ts    |  9 +--
 .../src/core/entities/NoteEntityService.ts    | 16 ++---
 .../backend/src/daemons/ServerStatsService.ts | 10 +--
 packages/backend/src/di-symbols.ts            |  1 +
 .../BakeBufferedReactionsProcessorService.ts  | 10 +--
 .../processors/DeliverProcessorService.ts     | 14 ++--
 .../queue/processors/InboxProcessorService.ts | 16 +++--
 packages/backend/src/server/ServerService.ts  |  9 +--
 .../backend/src/server/api/ApiCallService.ts  | 12 ++--
 .../src/server/api/SignupApiService.ts        | 35 +++++-----
 .../src/server/api/endpoints/ap/show.ts       | 14 ++--
 .../server/api/endpoints/channels/timeline.ts | 13 ++--
 .../backend/src/server/api/endpoints/drive.ts |  5 --
 .../api/endpoints/drive/files/create.ts       | 15 +++--
 .../server/api/endpoints/i/update-email.ts    |  9 +--
 .../src/server/api/endpoints/notes/create.ts  |  2 -
 .../api/endpoints/notes/hybrid-timeline.ts    | 13 ++--
 .../api/endpoints/notes/local-timeline.ts     | 15 ++---
 .../server/api/endpoints/notes/timeline.ts    | 13 ++--
 .../server/api/endpoints/notes/translate.ts   | 17 ++---
 .../api/endpoints/notes/user-list-timeline.ts | 15 ++---
 .../src/server/api/endpoints/pinned-users.ts  | 11 ++--
 .../src/server/api/endpoints/server-info.ts   | 10 +--
 .../src/server/api/endpoints/sw/register.ts   | 13 ++--
 .../api/endpoints/username/available.ts       | 11 ++--
 .../src/server/api/endpoints/users/notes.ts   | 11 ++--
 .../src/server/web/ClientServerService.ts     | 66 +++++++------------
 .../src/server/web/UrlPreviewService.ts       | 17 +++--
 packages/backend/test-server/entry.ts         | 22 ++++++-
 packages/backend/test/jest.setup.ts           |  6 +-
 packages/backend/test/misc/mock-resolver.ts   |  3 +-
 packages/backend/test/unit/RoleService.ts     | 45 +++++--------
 packages/backend/test/unit/activitypub.ts     | 21 +++---
 55 files changed, 499 insertions(+), 487 deletions(-)

diff --git a/packages/backend/src/GlobalModule.ts b/packages/backend/src/GlobalModule.ts
index 2ecc1f4742..0f69cf93a9 100644
--- a/packages/backend/src/GlobalModule.ts
+++ b/packages/backend/src/GlobalModule.ts
@@ -13,6 +13,8 @@ import { createPostgresDataSource } from './postgres.js';
 import { RepositoryModule } from './models/RepositoryModule.js';
 import { allSettled } from './misc/promise-tracker.js';
 import type { Provider, OnApplicationShutdown } from '@nestjs/common';
+import { MiMeta } from '@/models/Meta.js';
+import { GlobalEvents } from './core/GlobalEventService.js';
 
 const $config: Provider = {
 	provide: DI.config,
@@ -86,11 +88,68 @@ const $redisForReactions: Provider = {
 	inject: [DI.config],
 };
 
+const $meta: Provider = {
+	provide: DI.meta,
+	useFactory: async (db: DataSource, redisForSub: Redis.Redis) => {
+		const meta = await db.transaction(async transactionalEntityManager => {
+			// 過去のバグでレコードが複数出来てしまっている可能性があるので新しいIDを優先する
+			const metas = await transactionalEntityManager.find(MiMeta, {
+				order: {
+					id: 'DESC',
+				},
+			});
+
+			const meta = metas[0];
+
+			if (meta) {
+				return meta;
+			} else {
+				// metaが空のときfetchMetaが同時に呼ばれるとここが同時に呼ばれてしまうことがあるのでフェイルセーフなupsertを使う
+				const saved = await transactionalEntityManager
+					.upsert(
+						MiMeta,
+						{
+							id: 'x',
+						},
+						['id'],
+					)
+					.then((x) => transactionalEntityManager.findOneByOrFail(MiMeta, x.identifiers[0]));
+
+				return saved;
+			}
+		});
+
+		async function onMessage(_: string, data: string): Promise<void> {
+			const obj = JSON.parse(data);
+
+			if (obj.channel === 'internal') {
+				const { type, body } = obj.message as GlobalEvents['internal']['payload'];
+				switch (type) {
+					case 'metaUpdated': {
+						for (const key in body) {
+							(meta as any)[key] = (body as any)[key];
+						}
+						meta.proxyAccount = null; // joinなカラムは通常取ってこないので
+						break;
+					}
+					default:
+						break;
+				}
+			}
+		}
+
+		redisForSub.on('message', onMessage);
+
+		return meta;
+	},
+	inject: [DI.db, DI.redisForSub],
+};
+
 @Global()
 @Module({
 	imports: [RepositoryModule],
-	providers: [$config, $db, $meilisearch, $redis, $redisForPub, $redisForSub, $redisForTimelines, $redisForReactions],
-	exports: [$config, $db, $meilisearch, $redis, $redisForPub, $redisForSub, $redisForTimelines, $redisForReactions, RepositoryModule],
+	providers: [$config, $db, $meta, $meilisearch, $redis, $redisForPub, $redisForSub, $redisForTimelines, $redisForReactions],
+	exports: [$config, $db, $meta, $meilisearch, $redis, $redisForPub, $redisForSub, $redisForTimelines, $redisForReactions, RepositoryModule],
 })
 export class GlobalModule implements OnApplicationShutdown {
 	constructor(
diff --git a/packages/backend/src/core/AbuseReportNotificationService.ts b/packages/backend/src/core/AbuseReportNotificationService.ts
index 7be5335885..fe2c63e7d6 100644
--- a/packages/backend/src/core/AbuseReportNotificationService.ts
+++ b/packages/backend/src/core/AbuseReportNotificationService.ts
@@ -14,10 +14,10 @@ import type {
 	AbuseReportNotificationRecipientRepository,
 	MiAbuseReportNotificationRecipient,
 	MiAbuseUserReport,
+	MiMeta,
 	MiUser,
 } from '@/models/_.js';
 import { EmailService } from '@/core/EmailService.js';
-import { MetaService } from '@/core/MetaService.js';
 import { RoleService } from '@/core/RoleService.js';
 import { RecipientMethod } from '@/models/AbuseReportNotificationRecipient.js';
 import { ModerationLogService } from '@/core/ModerationLogService.js';
@@ -27,15 +27,19 @@ import { IdService } from './IdService.js';
 @Injectable()
 export class AbuseReportNotificationService implements OnApplicationShutdown {
 	constructor(
+		@Inject(DI.meta)
+		private meta: MiMeta,
+
 		@Inject(DI.abuseReportNotificationRecipientRepository)
 		private abuseReportNotificationRecipientRepository: AbuseReportNotificationRecipientRepository,
+
 		@Inject(DI.redisForSub)
 		private redisForSub: Redis.Redis,
+
 		private idService: IdService,
 		private roleService: RoleService,
 		private systemWebhookService: SystemWebhookService,
 		private emailService: EmailService,
-		private metaService: MetaService,
 		private moderationLogService: ModerationLogService,
 		private globalEventService: GlobalEventService,
 	) {
@@ -93,10 +97,8 @@ export class AbuseReportNotificationService implements OnApplicationShutdown {
 			.filter(x => x != null),
 		);
 
-		// 送信先の鮮度を保つため、毎回取得する
-		const meta = await this.metaService.fetch(true);
 		recipientEMailAddresses.push(
-			...(meta.email ? [meta.email] : []),
+			...(this.meta.email ? [this.meta.email] : []),
 		);
 
 		if (recipientEMailAddresses.length <= 0) {
diff --git a/packages/backend/src/core/AccountMoveService.ts b/packages/backend/src/core/AccountMoveService.ts
index b6b591d240..6e3125044c 100644
--- a/packages/backend/src/core/AccountMoveService.ts
+++ b/packages/backend/src/core/AccountMoveService.ts
@@ -9,7 +9,7 @@ import { IsNull, In, MoreThan, Not } from 'typeorm';
 import { bindThis } from '@/decorators.js';
 import { DI } from '@/di-symbols.js';
 import type { MiLocalUser, MiRemoteUser, MiUser } from '@/models/User.js';
-import type { BlockingsRepository, FollowingsRepository, InstancesRepository, MutingsRepository, UserListMembershipsRepository, UsersRepository } from '@/models/_.js';
+import type { BlockingsRepository, FollowingsRepository, InstancesRepository, MiMeta, MutingsRepository, UserListMembershipsRepository, UsersRepository } from '@/models/_.js';
 import type { RelationshipJobData, ThinUser } from '@/queue/types.js';
 
 import { IdService } from '@/core/IdService.js';
@@ -22,13 +22,15 @@ import { ApRendererService } from '@/core/activitypub/ApRendererService.js';
 import { UserEntityService } from '@/core/entities/UserEntityService.js';
 import { ProxyAccountService } from '@/core/ProxyAccountService.js';
 import { FederatedInstanceService } from '@/core/FederatedInstanceService.js';
-import { MetaService } from '@/core/MetaService.js';
 import InstanceChart from '@/core/chart/charts/instance.js';
 import PerUserFollowingChart from '@/core/chart/charts/per-user-following.js';
 
 @Injectable()
 export class AccountMoveService {
 	constructor(
+		@Inject(DI.meta)
+		private meta: MiMeta,
+
 		@Inject(DI.usersRepository)
 		private usersRepository: UsersRepository,
 
@@ -57,7 +59,6 @@ export class AccountMoveService {
 		private perUserFollowingChart: PerUserFollowingChart,
 		private federatedInstanceService: FederatedInstanceService,
 		private instanceChart: InstanceChart,
-		private metaService: MetaService,
 		private relayService: RelayService,
 		private queueService: QueueService,
 	) {
@@ -276,7 +277,7 @@ export class AccountMoveService {
 		if (this.userEntityService.isRemoteUser(oldAccount)) {
 			this.federatedInstanceService.fetch(oldAccount.host).then(async i => {
 				this.instancesRepository.decrement({ id: i.id }, 'followersCount', localFollowerIds.length);
-				if ((await this.metaService.fetch()).enableChartsForFederatedInstances) {
+				if (this.meta.enableChartsForFederatedInstances) {
 					this.instanceChart.updateFollowers(i.host, false);
 				}
 			});
diff --git a/packages/backend/src/core/DriveService.ts b/packages/backend/src/core/DriveService.ts
index 8aa04b4da7..c332e5a0a8 100644
--- a/packages/backend/src/core/DriveService.ts
+++ b/packages/backend/src/core/DriveService.ts
@@ -11,11 +11,10 @@ import { sharpBmp } from '@misskey-dev/sharp-read-bmp';
 import { IsNull } from 'typeorm';
 import { DeleteObjectCommandInput, PutObjectCommandInput, NoSuchKey } from '@aws-sdk/client-s3';
 import { DI } from '@/di-symbols.js';
-import type { DriveFilesRepository, UsersRepository, DriveFoldersRepository, UserProfilesRepository } from '@/models/_.js';
+import type { DriveFilesRepository, UsersRepository, DriveFoldersRepository, UserProfilesRepository, MiMeta } from '@/models/_.js';
 import type { Config } from '@/config.js';
 import Logger from '@/logger.js';
 import type { MiRemoteUser, MiUser } from '@/models/User.js';
-import { MetaService } from '@/core/MetaService.js';
 import { MiDriveFile } from '@/models/DriveFile.js';
 import { IdService } from '@/core/IdService.js';
 import { isDuplicateKeyValueError } from '@/misc/is-duplicate-key-value-error.js';
@@ -99,6 +98,9 @@ export class DriveService {
 		@Inject(DI.config)
 		private config: Config,
 
+		@Inject(DI.meta)
+		private meta: MiMeta,
+
 		@Inject(DI.usersRepository)
 		private usersRepository: UsersRepository,
 
@@ -115,7 +117,6 @@ export class DriveService {
 		private userEntityService: UserEntityService,
 		private driveFileEntityService: DriveFileEntityService,
 		private idService: IdService,
-		private metaService: MetaService,
 		private downloadService: DownloadService,
 		private internalStorageService: InternalStorageService,
 		private s3Service: S3Service,
@@ -149,9 +150,7 @@ export class DriveService {
 	// thunbnail, webpublic を必要なら生成
 		const alts = await this.generateAlts(path, type, !file.uri);
 
-		const meta = await this.metaService.fetch();
-
-		if (meta.useObjectStorage) {
+		if (this.meta.useObjectStorage) {
 		//#region ObjectStorage params
 			let [ext] = (name.match(/\.([a-zA-Z0-9_-]+)$/) ?? ['']);
 
@@ -170,11 +169,11 @@ export class DriveService {
 				ext = '';
 			}
 
-			const baseUrl = meta.objectStorageBaseUrl
-				?? `${ meta.objectStorageUseSSL ? 'https' : 'http' }://${ meta.objectStorageEndpoint }${ meta.objectStoragePort ? `:${meta.objectStoragePort}` : '' }/${ meta.objectStorageBucket }`;
+			const baseUrl = this.meta.objectStorageBaseUrl
+				?? `${ this.meta.objectStorageUseSSL ? 'https' : 'http' }://${ this.meta.objectStorageEndpoint }${ this.meta.objectStoragePort ? `:${this.meta.objectStoragePort}` : '' }/${ this.meta.objectStorageBucket }`;
 
 			// for original
-			const key = `${meta.objectStoragePrefix}/${randomUUID()}${ext}`;
+			const key = `${this.meta.objectStoragePrefix}/${randomUUID()}${ext}`;
 			const url = `${ baseUrl }/${ key }`;
 
 			// for alts
@@ -191,7 +190,7 @@ export class DriveService {
 			];
 
 			if (alts.webpublic) {
-				webpublicKey = `${meta.objectStoragePrefix}/webpublic-${randomUUID()}.${alts.webpublic.ext}`;
+				webpublicKey = `${this.meta.objectStoragePrefix}/webpublic-${randomUUID()}.${alts.webpublic.ext}`;
 				webpublicUrl = `${ baseUrl }/${ webpublicKey }`;
 
 				this.registerLogger.info(`uploading webpublic: ${webpublicKey}`);
@@ -199,7 +198,7 @@ export class DriveService {
 			}
 
 			if (alts.thumbnail) {
-				thumbnailKey = `${meta.objectStoragePrefix}/thumbnail-${randomUUID()}.${alts.thumbnail.ext}`;
+				thumbnailKey = `${this.meta.objectStoragePrefix}/thumbnail-${randomUUID()}.${alts.thumbnail.ext}`;
 				thumbnailUrl = `${ baseUrl }/${ thumbnailKey }`;
 
 				this.registerLogger.info(`uploading thumbnail: ${thumbnailKey}`);
@@ -376,10 +375,8 @@ export class DriveService {
 		if (type === 'image/apng') type = 'image/png';
 		if (!FILE_TYPE_BROWSERSAFE.includes(type)) type = 'application/octet-stream';
 
-		const meta = await this.metaService.fetch();
-
 		const params = {
-			Bucket: meta.objectStorageBucket,
+			Bucket: this.meta.objectStorageBucket,
 			Key: key,
 			Body: stream,
 			ContentType: type,
@@ -392,9 +389,9 @@ export class DriveService {
 			// 許可されているファイル形式でしか拡張子をつけない
 			ext ? correctFilename(filename, ext) : filename,
 		);
-		if (meta.objectStorageSetPublicRead) params.ACL = 'public-read';
+		if (this.meta.objectStorageSetPublicRead) params.ACL = 'public-read';
 
-		await this.s3Service.upload(meta, params)
+		await this.s3Service.upload(this.meta, params)
 			.then(
 				result => {
 					if ('Bucket' in result) { // CompleteMultipartUploadCommandOutput
@@ -460,32 +457,31 @@ export class DriveService {
 		ext = null,
 	}: AddFileArgs): Promise<MiDriveFile> {
 		let skipNsfwCheck = false;
-		const instance = await this.metaService.fetch();
 		const userRoleNSFW = user && (await this.roleService.getUserPolicies(user.id)).alwaysMarkNsfw;
 		if (user == null) {
 			skipNsfwCheck = true;
 		} else if (userRoleNSFW) {
 			skipNsfwCheck = true;
 		}
-		if (instance.sensitiveMediaDetection === 'none') skipNsfwCheck = true;
-		if (user && instance.sensitiveMediaDetection === 'local' && this.userEntityService.isRemoteUser(user)) skipNsfwCheck = true;
-		if (user && instance.sensitiveMediaDetection === 'remote' && this.userEntityService.isLocalUser(user)) skipNsfwCheck = true;
+		if (this.meta.sensitiveMediaDetection === 'none') skipNsfwCheck = true;
+		if (user && this.meta.sensitiveMediaDetection === 'local' && this.userEntityService.isRemoteUser(user)) skipNsfwCheck = true;
+		if (user && this.meta.sensitiveMediaDetection === 'remote' && this.userEntityService.isLocalUser(user)) skipNsfwCheck = true;
 
 		const info = await this.fileInfoService.getFileInfo(path, {
 			skipSensitiveDetection: skipNsfwCheck,
 			sensitiveThreshold: // 感度が高いほどしきい値は低くすることになる
-			instance.sensitiveMediaDetectionSensitivity === 'veryHigh' ? 0.1 :
-			instance.sensitiveMediaDetectionSensitivity === 'high' ? 0.3 :
-			instance.sensitiveMediaDetectionSensitivity === 'low' ? 0.7 :
-			instance.sensitiveMediaDetectionSensitivity === 'veryLow' ? 0.9 :
+			this.meta.sensitiveMediaDetectionSensitivity === 'veryHigh' ? 0.1 :
+			this.meta.sensitiveMediaDetectionSensitivity === 'high' ? 0.3 :
+			this.meta.sensitiveMediaDetectionSensitivity === 'low' ? 0.7 :
+			this.meta.sensitiveMediaDetectionSensitivity === 'veryLow' ? 0.9 :
 			0.5,
 			sensitiveThresholdForPorn: 0.75,
-			enableSensitiveMediaDetectionForVideos: instance.enableSensitiveMediaDetectionForVideos,
+			enableSensitiveMediaDetectionForVideos: this.meta.enableSensitiveMediaDetectionForVideos,
 		});
 		this.registerLogger.info(`${JSON.stringify(info)}`);
 
 		// 現状 false positive が多すぎて実用に耐えない
-		//if (info.porn && instance.disallowUploadWhenPredictedAsPorn) {
+		//if (info.porn && this.meta.disallowUploadWhenPredictedAsPorn) {
 		//	throw new IdentifiableError('282f77bf-5816-4f72-9264-aa14d8261a21', 'Detected as porn.');
 		//}
 
@@ -589,9 +585,9 @@ export class DriveService {
 			sensitive ?? false
 			: false;
 
-		if (user && this.utilityService.isMediaSilencedHost(instance.mediaSilencedHosts, user.host)) file.isSensitive = true;
+		if (user && this.utilityService.isMediaSilencedHost(this.meta.mediaSilencedHosts, user.host)) file.isSensitive = true;
 		if (info.sensitive && profile!.autoSensitive) file.isSensitive = true;
-		if (info.sensitive && instance.setSensitiveFlagAutomatically) file.isSensitive = true;
+		if (info.sensitive && this.meta.setSensitiveFlagAutomatically) file.isSensitive = true;
 		if (userRoleNSFW) file.isSensitive = true;
 
 		if (url !== null) {
@@ -652,7 +648,7 @@ export class DriveService {
 			// ローカルユーザーのみ
 			this.perUserDriveChart.update(file, true);
 		} else {
-			if ((await this.metaService.fetch()).enableChartsForFederatedInstances) {
+			if (this.meta.enableChartsForFederatedInstances) {
 				this.instanceChart.updateDrive(file, true);
 			}
 		}
@@ -798,7 +794,7 @@ export class DriveService {
 			// ローカルユーザーのみ
 			this.perUserDriveChart.update(file, false);
 		} else {
-			if ((await this.metaService.fetch()).enableChartsForFederatedInstances) {
+			if (this.meta.enableChartsForFederatedInstances) {
 				this.instanceChart.updateDrive(file, false);
 			}
 		}
@@ -820,14 +816,13 @@ export class DriveService {
 
 	@bindThis
 	public async deleteObjectStorageFile(key: string) {
-		const meta = await this.metaService.fetch();
 		try {
 			const param = {
-				Bucket: meta.objectStorageBucket,
+				Bucket: this.meta.objectStorageBucket,
 				Key: key,
 			} as DeleteObjectCommandInput;
 
-			await this.s3Service.delete(meta, param);
+			await this.s3Service.delete(this.meta, param);
 		} catch (err: any) {
 			if (err.name === 'NoSuchKey') {
 				this.deleteLogger.warn(`The object storage had no such key to delete: ${key}. Skipping this.`, err as Error);
diff --git a/packages/backend/src/core/EmailService.ts b/packages/backend/src/core/EmailService.ts
index 37fa58bb65..a176474b95 100644
--- a/packages/backend/src/core/EmailService.ts
+++ b/packages/backend/src/core/EmailService.ts
@@ -8,16 +8,14 @@ import * as nodemailer from 'nodemailer';
 import juice from 'juice';
 import { Inject, Injectable } from '@nestjs/common';
 import { validate as validateEmail } from 'deep-email-validator';
-import { MetaService } from '@/core/MetaService.js';
 import { UtilityService } from '@/core/UtilityService.js';
 import { DI } from '@/di-symbols.js';
 import type { Config } from '@/config.js';
 import type Logger from '@/logger.js';
-import type { UserProfilesRepository } from '@/models/_.js';
+import type { MiMeta, UserProfilesRepository } from '@/models/_.js';
 import { LoggerService } from '@/core/LoggerService.js';
 import { bindThis } from '@/decorators.js';
 import { HttpRequestService } from '@/core/HttpRequestService.js';
-import { QueueService } from '@/core/QueueService.js';
 
 @Injectable()
 export class EmailService {
@@ -27,38 +25,37 @@ export class EmailService {
 		@Inject(DI.config)
 		private config: Config,
 
+		@Inject(DI.meta)
+		private meta: MiMeta,
+
 		@Inject(DI.userProfilesRepository)
 		private userProfilesRepository: UserProfilesRepository,
 
-		private metaService: MetaService,
 		private loggerService: LoggerService,
 		private utilityService: UtilityService,
 		private httpRequestService: HttpRequestService,
-		private queueService: QueueService,
 	) {
 		this.logger = this.loggerService.getLogger('email');
 	}
 
 	@bindThis
 	public async sendEmail(to: string, subject: string, html: string, text: string) {
-		const meta = await this.metaService.fetch(true);
-
-		if (!meta.enableEmail) return;
+		if (!this.meta.enableEmail) return;
 
 		const iconUrl = `${this.config.url}/static-assets/mi-white.png`;
 		const emailSettingUrl = `${this.config.url}/settings/email`;
 
-		const enableAuth = meta.smtpUser != null && meta.smtpUser !== '';
+		const enableAuth = this.meta.smtpUser != null && this.meta.smtpUser !== '';
 
 		const transporter = nodemailer.createTransport({
-			host: meta.smtpHost,
-			port: meta.smtpPort,
-			secure: meta.smtpSecure,
+			host: this.meta.smtpHost,
+			port: this.meta.smtpPort,
+			secure: this.meta.smtpSecure,
 			ignoreTLS: !enableAuth,
 			proxy: this.config.proxySmtp,
 			auth: enableAuth ? {
-				user: meta.smtpUser,
-				pass: meta.smtpPass,
+				user: this.meta.smtpUser,
+				pass: this.meta.smtpPass,
 			} : undefined,
 		} as any);
 
@@ -127,7 +124,7 @@ export class EmailService {
 	<body>
 		<main>
 			<header>
-				<img src="${ meta.logoImageUrl ?? meta.iconUrl ?? iconUrl }"/>
+				<img src="${ this.meta.logoImageUrl ?? this.meta.iconUrl ?? iconUrl }"/>
 			</header>
 			<article>
 				<h1>${ subject }</h1>
@@ -148,7 +145,7 @@ export class EmailService {
 		try {
 			// TODO: htmlサニタイズ
 			const info = await transporter.sendMail({
-				from: meta.email!,
+				from: this.meta.email!,
 				to: to,
 				subject: subject,
 				text: text,
@@ -167,8 +164,6 @@ export class EmailService {
 		available: boolean;
 		reason: null | 'used' | 'format' | 'disposable' | 'mx' | 'smtp' | 'banned' | 'network' | 'blacklist';
 	}> {
-		const meta = await this.metaService.fetch();
-
 		const exist = await this.userProfilesRepository.countBy({
 			emailVerified: true,
 			email: emailAddress,
@@ -186,11 +181,11 @@ export class EmailService {
 			reason?: string | null,
 		} = { valid: true, reason: null };
 
-		if (meta.enableActiveEmailValidation) {
-			if (meta.enableVerifymailApi && meta.verifymailAuthKey != null) {
-				validated = await this.verifyMail(emailAddress, meta.verifymailAuthKey);
-			} else if (meta.enableTruemailApi && meta.truemailInstance && meta.truemailAuthKey != null) {
-				validated = await this.trueMail(meta.truemailInstance, emailAddress, meta.truemailAuthKey);
+		if (this.meta.enableActiveEmailValidation) {
+			if (this.meta.enableVerifymailApi && this.meta.verifymailAuthKey != null) {
+				validated = await this.verifyMail(emailAddress, this.meta.verifymailAuthKey);
+			} else if (this.meta.enableTruemailApi && this.meta.truemailInstance && this.meta.truemailAuthKey != null) {
+				validated = await this.trueMail(this.meta.truemailInstance, emailAddress, this.meta.truemailAuthKey);
 			} else {
 				validated = await validateEmail({
 					email: emailAddress,
@@ -220,7 +215,7 @@ export class EmailService {
 		}
 
 		const emailDomain: string = emailAddress.split('@')[1];
-		const isBanned = this.utilityService.isBlockedHost(meta.bannedEmailDomains, emailDomain);
+		const isBanned = this.utilityService.isBlockedHost(this.meta.bannedEmailDomains, emailDomain);
 
 		if (isBanned) {
 			return {
diff --git a/packages/backend/src/core/HashtagService.ts b/packages/backend/src/core/HashtagService.ts
index eb192ee6da..793bbeecb1 100644
--- a/packages/backend/src/core/HashtagService.ts
+++ b/packages/backend/src/core/HashtagService.ts
@@ -10,16 +10,18 @@ import type { MiUser } from '@/models/User.js';
 import { normalizeForSearch } from '@/misc/normalize-for-search.js';
 import { IdService } from '@/core/IdService.js';
 import type { MiHashtag } from '@/models/Hashtag.js';
-import type { HashtagsRepository } from '@/models/_.js';
+import type { HashtagsRepository, MiMeta } from '@/models/_.js';
 import { UserEntityService } from '@/core/entities/UserEntityService.js';
 import { bindThis } from '@/decorators.js';
 import { FeaturedService } from '@/core/FeaturedService.js';
-import { MetaService } from '@/core/MetaService.js';
 import { UtilityService } from '@/core/UtilityService.js';
 
 @Injectable()
 export class HashtagService {
 	constructor(
+		@Inject(DI.meta)
+		private meta: MiMeta,
+
 		@Inject(DI.redis)
 		private redisClient: Redis.Redis, // TODO: 専用のRedisサーバーを設定できるようにする
 
@@ -29,7 +31,6 @@ export class HashtagService {
 		private userEntityService: UserEntityService,
 		private featuredService: FeaturedService,
 		private idService: IdService,
-		private metaService: MetaService,
 		private utilityService: UtilityService,
 	) {
 	}
@@ -160,10 +161,9 @@ export class HashtagService {
 
 	@bindThis
 	public async updateHashtagsRanking(hashtag: string, userId: MiUser['id']): Promise<void> {
-		const instance = await this.metaService.fetch();
-		const hiddenTags = instance.hiddenTags.map(t => normalizeForSearch(t));
+		const hiddenTags = this.meta.hiddenTags.map(t => normalizeForSearch(t));
 		if (hiddenTags.includes(hashtag)) return;
-		if (this.utilityService.isKeyWordIncluded(hashtag, instance.sensitiveWords)) return;
+		if (this.utilityService.isKeyWordIncluded(hashtag, this.meta.sensitiveWords)) return;
 
 		// YYYYMMDDHHmm (10分間隔)
 		const now = new Date();
diff --git a/packages/backend/src/core/NoteCreateService.ts b/packages/backend/src/core/NoteCreateService.ts
index 1d8d248322..18efc9d562 100644
--- a/packages/backend/src/core/NoteCreateService.ts
+++ b/packages/backend/src/core/NoteCreateService.ts
@@ -8,13 +8,12 @@ import * as mfm from 'mfm-js';
 import { In, DataSource, IsNull, LessThan } from 'typeorm';
 import * as Redis from 'ioredis';
 import { Inject, Injectable, OnApplicationShutdown } from '@nestjs/common';
-import RE2 from 're2';
 import { extractMentions } from '@/misc/extract-mentions.js';
 import { extractCustomEmojisFromMfm } from '@/misc/extract-custom-emojis-from-mfm.js';
 import { extractHashtags } from '@/misc/extract-hashtags.js';
 import type { IMentionedRemoteUsers } from '@/models/Note.js';
 import { MiNote } from '@/models/Note.js';
-import type { ChannelFollowingsRepository, ChannelsRepository, FollowingsRepository, InstancesRepository, MiFollowing, MutingsRepository, NotesRepository, NoteThreadMutingsRepository, UserListMembershipsRepository, UserProfilesRepository, UsersRepository } from '@/models/_.js';
+import type { ChannelFollowingsRepository, ChannelsRepository, FollowingsRepository, InstancesRepository, MiFollowing, MiMeta, MutingsRepository, NotesRepository, NoteThreadMutingsRepository, UserListMembershipsRepository, UserProfilesRepository, UsersRepository } from '@/models/_.js';
 import type { MiDriveFile } from '@/models/DriveFile.js';
 import type { MiApp } from '@/models/App.js';
 import { concat } from '@/misc/prelude/array.js';
@@ -23,11 +22,8 @@ import type { MiUser, MiLocalUser, MiRemoteUser } from '@/models/User.js';
 import type { IPoll } from '@/models/Poll.js';
 import { MiPoll } from '@/models/Poll.js';
 import { isDuplicateKeyValueError } from '@/misc/is-duplicate-key-value-error.js';
-import { checkWordMute } from '@/misc/check-word-mute.js';
 import type { MiChannel } from '@/models/Channel.js';
 import { normalizeForSearch } from '@/misc/normalize-for-search.js';
-import { MemorySingleCache } from '@/misc/cache.js';
-import type { MiUserProfile } from '@/models/UserProfile.js';
 import { RelayService } from '@/core/RelayService.js';
 import { FederatedInstanceService } from '@/core/FederatedInstanceService.js';
 import { DI } from '@/di-symbols.js';
@@ -51,7 +47,6 @@ import { RemoteUserResolveService } from '@/core/RemoteUserResolveService.js';
 import { bindThis } from '@/decorators.js';
 import { DB_MAX_NOTE_TEXT_LENGTH } from '@/const.js';
 import { RoleService } from '@/core/RoleService.js';
-import { MetaService } from '@/core/MetaService.js';
 import { SearchService } from '@/core/SearchService.js';
 import { FeaturedService } from '@/core/FeaturedService.js';
 import { FanoutTimelineService } from '@/core/FanoutTimelineService.js';
@@ -156,6 +151,9 @@ export class NoteCreateService implements OnApplicationShutdown {
 		@Inject(DI.config)
 		private config: Config,
 
+		@Inject(DI.meta)
+		private meta: MiMeta,
+
 		@Inject(DI.db)
 		private db: DataSource,
 
@@ -210,7 +208,6 @@ export class NoteCreateService implements OnApplicationShutdown {
 		private apDeliverManagerService: ApDeliverManagerService,
 		private apRendererService: ApRendererService,
 		private roleService: RoleService,
-		private metaService: MetaService,
 		private searchService: SearchService,
 		private notesChart: NotesChart,
 		private perUserNotesChart: PerUserNotesChart,
@@ -251,10 +248,8 @@ export class NoteCreateService implements OnApplicationShutdown {
 		if (data.channel != null) data.visibleUsers = [];
 		if (data.channel != null) data.localOnly = true;
 
-		const meta = await this.metaService.fetch();
-
 		if (data.visibility === 'public' && data.channel == null) {
-			const sensitiveWords = meta.sensitiveWords;
+			const sensitiveWords = this.meta.sensitiveWords;
 			if (this.utilityService.isKeyWordIncluded(data.cw ?? data.text ?? '', sensitiveWords)) {
 				data.visibility = 'home';
 			} else if ((await this.roleService.getUserPolicies(user.id)).canPublicNote === false) {
@@ -262,17 +257,17 @@ export class NoteCreateService implements OnApplicationShutdown {
 			}
 		}
 
-		const hasProhibitedWords = await this.checkProhibitedWordsContain({
+		const hasProhibitedWords = this.checkProhibitedWordsContain({
 			cw: data.cw,
 			text: data.text,
 			pollChoices: data.poll?.choices,
-		}, meta.prohibitedWords);
+		}, this.meta.prohibitedWords);
 
 		if (hasProhibitedWords) {
 			throw new IdentifiableError('689ee33f-f97c-479a-ac49-1b9f8140af99', 'Note contains prohibited words');
 		}
 
-		const inSilencedInstance = this.utilityService.isSilencedHost(meta.silencedHosts, user.host);
+		const inSilencedInstance = this.utilityService.isSilencedHost(this.meta.silencedHosts, user.host);
 
 		if (data.visibility === 'public' && inSilencedInstance && user.host !== null) {
 			data.visibility = 'home';
@@ -365,7 +360,7 @@ export class NoteCreateService implements OnApplicationShutdown {
 		}
 
 		// if the host is media-silenced, custom emojis are not allowed
-		if (this.utilityService.isMediaSilencedHost(meta.mediaSilencedHosts, user.host)) emojis = [];
+		if (this.utilityService.isMediaSilencedHost(this.meta.mediaSilencedHosts, user.host)) emojis = [];
 
 		tags = tags.filter(tag => Array.from(tag).length <= 128).splice(0, 32);
 
@@ -506,10 +501,8 @@ export class NoteCreateService implements OnApplicationShutdown {
 		host: MiUser['host'];
 		isBot: MiUser['isBot'];
 	}, data: Option, silent: boolean, tags: string[], mentionedUsers: MinimumUser[]) {
-		const meta = await this.metaService.fetch();
-
 		this.notesChart.update(note, true);
-		if (note.visibility !== 'specified' && (meta.enableChartsForRemoteUser || (user.host == null))) {
+		if (note.visibility !== 'specified' && (this.meta.enableChartsForRemoteUser || (user.host == null))) {
 			this.perUserNotesChart.update(user, note, true);
 		}
 
@@ -517,7 +510,7 @@ export class NoteCreateService implements OnApplicationShutdown {
 		if (this.userEntityService.isRemoteUser(user)) {
 			this.federatedInstanceService.fetch(user.host).then(async i => {
 				this.instancesRepository.increment({ id: i.id }, 'notesCount', 1);
-				if ((await this.metaService.fetch()).enableChartsForFederatedInstances) {
+				if (this.meta.enableChartsForFederatedInstances) {
 					this.instanceChart.updateNote(i.host, note, true);
 				}
 			});
@@ -853,15 +846,14 @@ export class NoteCreateService implements OnApplicationShutdown {
 
 	@bindThis
 	private async pushToTl(note: MiNote, user: { id: MiUser['id']; host: MiUser['host']; }) {
-		const meta = await this.metaService.fetch();
-		if (!meta.enableFanoutTimeline) return;
+		if (!this.meta.enableFanoutTimeline) return;
 
 		const r = this.redisForTimelines.pipeline();
 
 		if (note.channelId) {
 			this.fanoutTimelineService.push(`channelTimeline:${note.channelId}`, note.id, this.config.perChannelMaxNoteCacheCount, r);
 
-			this.fanoutTimelineService.push(`userTimelineWithChannel:${user.id}`, note.id, note.userHost == null ? meta.perLocalUserUserTimelineCacheMax : meta.perRemoteUserUserTimelineCacheMax, r);
+			this.fanoutTimelineService.push(`userTimelineWithChannel:${user.id}`, note.id, note.userHost == null ? this.meta.perLocalUserUserTimelineCacheMax : this.meta.perRemoteUserUserTimelineCacheMax, r);
 
 			const channelFollowings = await this.channelFollowingsRepository.find({
 				where: {
@@ -871,9 +863,9 @@ export class NoteCreateService implements OnApplicationShutdown {
 			});
 
 			for (const channelFollowing of channelFollowings) {
-				this.fanoutTimelineService.push(`homeTimeline:${channelFollowing.followerId}`, note.id, meta.perUserHomeTimelineCacheMax, r);
+				this.fanoutTimelineService.push(`homeTimeline:${channelFollowing.followerId}`, note.id, this.meta.perUserHomeTimelineCacheMax, r);
 				if (note.fileIds.length > 0) {
-					this.fanoutTimelineService.push(`homeTimelineWithFiles:${channelFollowing.followerId}`, note.id, meta.perUserHomeTimelineCacheMax / 2, r);
+					this.fanoutTimelineService.push(`homeTimelineWithFiles:${channelFollowing.followerId}`, note.id, this.meta.perUserHomeTimelineCacheMax / 2, r);
 				}
 			}
 		} else {
@@ -911,9 +903,9 @@ export class NoteCreateService implements OnApplicationShutdown {
 					if (!following.withReplies) continue;
 				}
 
-				this.fanoutTimelineService.push(`homeTimeline:${following.followerId}`, note.id, meta.perUserHomeTimelineCacheMax, r);
+				this.fanoutTimelineService.push(`homeTimeline:${following.followerId}`, note.id, this.meta.perUserHomeTimelineCacheMax, r);
 				if (note.fileIds.length > 0) {
-					this.fanoutTimelineService.push(`homeTimelineWithFiles:${following.followerId}`, note.id, meta.perUserHomeTimelineCacheMax / 2, r);
+					this.fanoutTimelineService.push(`homeTimelineWithFiles:${following.followerId}`, note.id, this.meta.perUserHomeTimelineCacheMax / 2, r);
 				}
 			}
 
@@ -930,25 +922,25 @@ export class NoteCreateService implements OnApplicationShutdown {
 					if (!userListMembership.withReplies) continue;
 				}
 
-				this.fanoutTimelineService.push(`userListTimeline:${userListMembership.userListId}`, note.id, meta.perUserListTimelineCacheMax, r);
+				this.fanoutTimelineService.push(`userListTimeline:${userListMembership.userListId}`, note.id, this.meta.perUserListTimelineCacheMax, r);
 				if (note.fileIds.length > 0) {
-					this.fanoutTimelineService.push(`userListTimelineWithFiles:${userListMembership.userListId}`, note.id, meta.perUserListTimelineCacheMax / 2, r);
+					this.fanoutTimelineService.push(`userListTimelineWithFiles:${userListMembership.userListId}`, note.id, this.meta.perUserListTimelineCacheMax / 2, r);
 				}
 			}
 
 			// 自分自身のHTL
 			if (note.userHost == null) {
 				if (note.visibility !== 'specified' || !note.visibleUserIds.some(v => v === user.id)) {
-					this.fanoutTimelineService.push(`homeTimeline:${user.id}`, note.id, meta.perUserHomeTimelineCacheMax, r);
+					this.fanoutTimelineService.push(`homeTimeline:${user.id}`, note.id, this.meta.perUserHomeTimelineCacheMax, r);
 					if (note.fileIds.length > 0) {
-						this.fanoutTimelineService.push(`homeTimelineWithFiles:${user.id}`, note.id, meta.perUserHomeTimelineCacheMax / 2, r);
+						this.fanoutTimelineService.push(`homeTimelineWithFiles:${user.id}`, note.id, this.meta.perUserHomeTimelineCacheMax / 2, r);
 					}
 				}
 			}
 
 			// 自分自身以外への返信
 			if (isReply(note)) {
-				this.fanoutTimelineService.push(`userTimelineWithReplies:${user.id}`, note.id, note.userHost == null ? meta.perLocalUserUserTimelineCacheMax : meta.perRemoteUserUserTimelineCacheMax, r);
+				this.fanoutTimelineService.push(`userTimelineWithReplies:${user.id}`, note.id, note.userHost == null ? this.meta.perLocalUserUserTimelineCacheMax : this.meta.perRemoteUserUserTimelineCacheMax, r);
 
 				if (note.visibility === 'public' && note.userHost == null) {
 					this.fanoutTimelineService.push('localTimelineWithReplies', note.id, 300, r);
@@ -957,9 +949,9 @@ export class NoteCreateService implements OnApplicationShutdown {
 					}
 				}
 			} else {
-				this.fanoutTimelineService.push(`userTimeline:${user.id}`, note.id, note.userHost == null ? meta.perLocalUserUserTimelineCacheMax : meta.perRemoteUserUserTimelineCacheMax, r);
+				this.fanoutTimelineService.push(`userTimeline:${user.id}`, note.id, note.userHost == null ? this.meta.perLocalUserUserTimelineCacheMax : this.meta.perRemoteUserUserTimelineCacheMax, r);
 				if (note.fileIds.length > 0) {
-					this.fanoutTimelineService.push(`userTimelineWithFiles:${user.id}`, note.id, note.userHost == null ? meta.perLocalUserUserTimelineCacheMax / 2 : meta.perRemoteUserUserTimelineCacheMax / 2, r);
+					this.fanoutTimelineService.push(`userTimelineWithFiles:${user.id}`, note.id, note.userHost == null ? this.meta.perLocalUserUserTimelineCacheMax / 2 : this.meta.perRemoteUserUserTimelineCacheMax / 2, r);
 				}
 
 				if (note.visibility === 'public' && note.userHost == null) {
@@ -1018,9 +1010,9 @@ export class NoteCreateService implements OnApplicationShutdown {
 		}
 	}
 
-	public async checkProhibitedWordsContain(content: Parameters<UtilityService['concatNoteContentsForKeyWordCheck']>[0], prohibitedWords?: string[]) {
+	public checkProhibitedWordsContain(content: Parameters<UtilityService['concatNoteContentsForKeyWordCheck']>[0], prohibitedWords?: string[]) {
 		if (prohibitedWords == null) {
-			prohibitedWords = (await this.metaService.fetch()).prohibitedWords;
+			prohibitedWords = this.meta.prohibitedWords;
 		}
 
 		if (
diff --git a/packages/backend/src/core/NoteDeleteService.ts b/packages/backend/src/core/NoteDeleteService.ts
index b7c01c64c8..f9f8ace386 100644
--- a/packages/backend/src/core/NoteDeleteService.ts
+++ b/packages/backend/src/core/NoteDeleteService.ts
@@ -7,7 +7,7 @@ import { Brackets, In } from 'typeorm';
 import { Injectable, Inject } from '@nestjs/common';
 import type { MiUser, MiLocalUser, MiRemoteUser } from '@/models/User.js';
 import type { MiNote, IMentionedRemoteUsers } from '@/models/Note.js';
-import type { InstancesRepository, NotesRepository, UsersRepository } from '@/models/_.js';
+import type { InstancesRepository, MiMeta, NotesRepository, UsersRepository } from '@/models/_.js';
 import { RelayService } from '@/core/RelayService.js';
 import { FederatedInstanceService } from '@/core/FederatedInstanceService.js';
 import { DI } from '@/di-symbols.js';
@@ -19,9 +19,7 @@ import { GlobalEventService } from '@/core/GlobalEventService.js';
 import { ApRendererService } from '@/core/activitypub/ApRendererService.js';
 import { ApDeliverManagerService } from '@/core/activitypub/ApDeliverManagerService.js';
 import { UserEntityService } from '@/core/entities/UserEntityService.js';
-import { NoteEntityService } from '@/core/entities/NoteEntityService.js';
 import { bindThis } from '@/decorators.js';
-import { MetaService } from '@/core/MetaService.js';
 import { SearchService } from '@/core/SearchService.js';
 import { ModerationLogService } from '@/core/ModerationLogService.js';
 import { isQuote, isRenote } from '@/misc/is-renote.js';
@@ -32,6 +30,9 @@ export class NoteDeleteService {
 		@Inject(DI.config)
 		private config: Config,
 
+		@Inject(DI.meta)
+		private meta: MiMeta,
+
 		@Inject(DI.usersRepository)
 		private usersRepository: UsersRepository,
 
@@ -42,13 +43,11 @@ export class NoteDeleteService {
 		private instancesRepository: InstancesRepository,
 
 		private userEntityService: UserEntityService,
-		private noteEntityService: NoteEntityService,
 		private globalEventService: GlobalEventService,
 		private relayService: RelayService,
 		private federatedInstanceService: FederatedInstanceService,
 		private apRendererService: ApRendererService,
 		private apDeliverManagerService: ApDeliverManagerService,
-		private metaService: MetaService,
 		private searchService: SearchService,
 		private moderationLogService: ModerationLogService,
 		private notesChart: NotesChart,
@@ -102,17 +101,15 @@ export class NoteDeleteService {
 			}
 			//#endregion
 
-			const meta = await this.metaService.fetch();
-
 			this.notesChart.update(note, false);
-			if (meta.enableChartsForRemoteUser || (user.host == null)) {
+			if (this.meta.enableChartsForRemoteUser || (user.host == null)) {
 				this.perUserNotesChart.update(user, note, false);
 			}
 
 			if (this.userEntityService.isRemoteUser(user)) {
 				this.federatedInstanceService.fetch(user.host).then(async i => {
 					this.instancesRepository.decrement({ id: i.id }, 'notesCount', 1);
-					if ((await this.metaService.fetch()).enableChartsForFederatedInstances) {
+					if (this.meta.enableChartsForFederatedInstances) {
 						this.instanceChart.updateNote(i.host, note, false);
 					}
 				});
diff --git a/packages/backend/src/core/ProxyAccountService.ts b/packages/backend/src/core/ProxyAccountService.ts
index 71d663bf90..c3ff2a68d3 100644
--- a/packages/backend/src/core/ProxyAccountService.ts
+++ b/packages/backend/src/core/ProxyAccountService.ts
@@ -4,26 +4,25 @@
  */
 
 import { Inject, Injectable } from '@nestjs/common';
-import type { UsersRepository } from '@/models/_.js';
+import type { MiMeta, UsersRepository } from '@/models/_.js';
 import type { MiLocalUser } from '@/models/User.js';
 import { DI } from '@/di-symbols.js';
-import { MetaService } from '@/core/MetaService.js';
 import { bindThis } from '@/decorators.js';
 
 @Injectable()
 export class ProxyAccountService {
 	constructor(
+		@Inject(DI.meta)
+		private meta: MiMeta,
+
 		@Inject(DI.usersRepository)
 		private usersRepository: UsersRepository,
-
-		private metaService: MetaService,
 	) {
 	}
 
 	@bindThis
 	public async fetch(): Promise<MiLocalUser | null> {
-		const meta = await this.metaService.fetch();
-		if (meta.proxyAccountId == null) return null;
-		return await this.usersRepository.findOneByOrFail({ id: meta.proxyAccountId }) as MiLocalUser;
+		if (this.meta.proxyAccountId == null) return null;
+		return await this.usersRepository.findOneByOrFail({ id: this.meta.proxyAccountId }) as MiLocalUser;
 	}
 }
diff --git a/packages/backend/src/core/PushNotificationService.ts b/packages/backend/src/core/PushNotificationService.ts
index 6a845b951d..1479bb00d9 100644
--- a/packages/backend/src/core/PushNotificationService.ts
+++ b/packages/backend/src/core/PushNotificationService.ts
@@ -10,8 +10,7 @@ import { DI } from '@/di-symbols.js';
 import type { Config } from '@/config.js';
 import type { Packed } from '@/misc/json-schema.js';
 import { getNoteSummary } from '@/misc/get-note-summary.js';
-import type { MiSwSubscription, SwSubscriptionsRepository } from '@/models/_.js';
-import { MetaService } from '@/core/MetaService.js';
+import type { MiMeta, MiSwSubscription, SwSubscriptionsRepository } from '@/models/_.js';
 import { bindThis } from '@/decorators.js';
 import { RedisKVCache } from '@/misc/cache.js';
 
@@ -54,13 +53,14 @@ export class PushNotificationService implements OnApplicationShutdown {
 		@Inject(DI.config)
 		private config: Config,
 
+		@Inject(DI.meta)
+		private meta: MiMeta,
+
 		@Inject(DI.redis)
 		private redisClient: Redis.Redis,
 
 		@Inject(DI.swSubscriptionsRepository)
 		private swSubscriptionsRepository: SwSubscriptionsRepository,
-
-		private metaService: MetaService,
 	) {
 		this.subscriptionsCache = new RedisKVCache<MiSwSubscription[]>(this.redisClient, 'userSwSubscriptions', {
 			lifetime: 1000 * 60 * 60 * 1, // 1h
@@ -73,14 +73,12 @@ export class PushNotificationService implements OnApplicationShutdown {
 
 	@bindThis
 	public async pushNotification<T extends keyof PushNotificationsTypes>(userId: string, type: T, body: PushNotificationsTypes[T]) {
-		const meta = await this.metaService.fetch();
-
-		if (!meta.enableServiceWorker || meta.swPublicKey == null || meta.swPrivateKey == null) return;
+		if (!this.meta.enableServiceWorker || this.meta.swPublicKey == null || this.meta.swPrivateKey == null) return;
 
 		// アプリケーションの連絡先と、サーバーサイドの鍵ペアの情報を登録
 		push.setVapidDetails(this.config.url,
-			meta.swPublicKey,
-			meta.swPrivateKey);
+			this.meta.swPublicKey,
+			this.meta.swPrivateKey);
 
 		const subscriptions = await this.subscriptionsCache.fetch(userId);
 
diff --git a/packages/backend/src/core/ReactionService.ts b/packages/backend/src/core/ReactionService.ts
index db8fe1a838..f0a2876450 100644
--- a/packages/backend/src/core/ReactionService.ts
+++ b/packages/backend/src/core/ReactionService.ts
@@ -5,7 +5,7 @@
 
 import { Inject, Injectable } from '@nestjs/common';
 import { DI } from '@/di-symbols.js';
-import type { EmojisRepository, NoteReactionsRepository, UsersRepository, NotesRepository } from '@/models/_.js';
+import type { EmojisRepository, NoteReactionsRepository, UsersRepository, NotesRepository, MiMeta } from '@/models/_.js';
 import { IdentifiableError } from '@/misc/identifiable-error.js';
 import type { MiRemoteUser, MiUser } from '@/models/User.js';
 import type { MiNote } from '@/models/Note.js';
@@ -20,7 +20,6 @@ import { ApDeliverManagerService } from '@/core/activitypub/ApDeliverManagerServ
 import { NoteEntityService } from '@/core/entities/NoteEntityService.js';
 import { UserEntityService } from '@/core/entities/UserEntityService.js';
 import { ApRendererService } from '@/core/activitypub/ApRendererService.js';
-import { MetaService } from '@/core/MetaService.js';
 import { bindThis } from '@/decorators.js';
 import { UtilityService } from '@/core/UtilityService.js';
 import { UserBlockingService } from '@/core/UserBlockingService.js';
@@ -71,6 +70,9 @@ const decodeCustomEmojiRegexp = /^:([\w+-]+)(?:@([\w.-]+))?:$/;
 @Injectable()
 export class ReactionService {
 	constructor(
+		@Inject(DI.meta)
+		private meta: MiMeta,
+
 		@Inject(DI.usersRepository)
 		private usersRepository: UsersRepository,
 
@@ -84,7 +86,6 @@ export class ReactionService {
 		private emojisRepository: EmojisRepository,
 
 		private utilityService: UtilityService,
-		private metaService: MetaService,
 		private customEmojiService: CustomEmojiService,
 		private roleService: RoleService,
 		private userEntityService: UserEntityService,
@@ -103,8 +104,6 @@ export class ReactionService {
 
 	@bindThis
 	public async create(user: { id: MiUser['id']; host: MiUser['host']; isBot: MiUser['isBot'] }, note: MiNote, _reaction?: string | null) {
-		const meta = await this.metaService.fetch();
-
 		// Check blocking
 		if (note.userId !== user.id) {
 			const blocked = await this.userBlockingService.checkBlocked(note.userId, user.id);
@@ -150,7 +149,7 @@ export class ReactionService {
 						}
 
 						// for media silenced host, custom emoji reactions are not allowed
-						if (reacterHost != null && this.utilityService.isMediaSilencedHost(meta.mediaSilencedHosts, reacterHost)) {
+						if (reacterHost != null && this.utilityService.isMediaSilencedHost(this.meta.mediaSilencedHosts, reacterHost)) {
 							reaction = FALLBACK;
 						}
 					} else {
@@ -195,7 +194,7 @@ export class ReactionService {
 		}
 
 		// Increment reactions count
-		if (meta.enableReactionsBuffering) {
+		if (this.meta.enableReactionsBuffering) {
 			await this.reactionsBufferingService.create(note.id, user.id, reaction, note.reactionAndUserPairCache);
 		} else {
 			const sql = `jsonb_set("reactions", '{${reaction}}', (COALESCE("reactions"->>'${reaction}', '0')::int + 1)::text::jsonb)`;
@@ -228,7 +227,7 @@ export class ReactionService {
 			}
 		}
 
-		if (meta.enableChartsForRemoteUser || (user.host == null)) {
+		if (this.meta.enableChartsForRemoteUser || (user.host == null)) {
 			this.perUserReactionsChart.update(user, note);
 		}
 
@@ -305,10 +304,8 @@ export class ReactionService {
 			throw new IdentifiableError('60527ec9-b4cb-4a88-a6bd-32d3ad26817d', 'not reacted');
 		}
 
-		const meta = await this.metaService.fetch();
-
 		// Decrement reactions count
-		if (meta.enableReactionsBuffering) {
+		if (this.meta.enableReactionsBuffering) {
 			await this.reactionsBufferingService.delete(note.id, user.id, exist.reaction);
 		} else {
 			const sql = `jsonb_set("reactions", '{${exist.reaction}}', (COALESCE("reactions"->>'${exist.reaction}', '0')::int - 1)::text::jsonb)`;
diff --git a/packages/backend/src/core/RoleService.ts b/packages/backend/src/core/RoleService.ts
index 24752edcf6..583eea1a34 100644
--- a/packages/backend/src/core/RoleService.ts
+++ b/packages/backend/src/core/RoleService.ts
@@ -8,6 +8,7 @@ import * as Redis from 'ioredis';
 import { In } from 'typeorm';
 import { ModuleRef } from '@nestjs/core';
 import type {
+	MiMeta,
 	MiRole,
 	MiRoleAssignment,
 	RoleAssignmentsRepository,
@@ -18,7 +19,6 @@ import { MemoryKVCache, MemorySingleCache } from '@/misc/cache.js';
 import type { MiUser } from '@/models/User.js';
 import { DI } from '@/di-symbols.js';
 import { bindThis } from '@/decorators.js';
-import { MetaService } from '@/core/MetaService.js';
 import { CacheService } from '@/core/CacheService.js';
 import type { RoleCondFormulaValue } from '@/models/Role.js';
 import { UserEntityService } from '@/core/entities/UserEntityService.js';
@@ -111,8 +111,8 @@ export class RoleService implements OnApplicationShutdown, OnModuleInit {
 	constructor(
 		private moduleRef: ModuleRef,
 
-		@Inject(DI.redis)
-		private redisClient: Redis.Redis,
+		@Inject(DI.meta)
+		private meta: MiMeta,
 
 		@Inject(DI.redisForTimelines)
 		private redisForTimelines: Redis.Redis,
@@ -129,7 +129,6 @@ export class RoleService implements OnApplicationShutdown, OnModuleInit {
 		@Inject(DI.roleAssignmentsRepository)
 		private roleAssignmentsRepository: RoleAssignmentsRepository,
 
-		private metaService: MetaService,
 		private cacheService: CacheService,
 		private userEntityService: UserEntityService,
 		private globalEventService: GlobalEventService,
@@ -349,8 +348,7 @@ export class RoleService implements OnApplicationShutdown, OnModuleInit {
 
 	@bindThis
 	public async getUserPolicies(userId: MiUser['id'] | null): Promise<RolePolicies> {
-		const meta = await this.metaService.fetch();
-		const basePolicies = { ...DEFAULT_POLICIES, ...meta.policies };
+		const basePolicies = { ...DEFAULT_POLICIES, ...this.meta.policies };
 
 		if (userId == null) return basePolicies;
 
diff --git a/packages/backend/src/core/SignupService.ts b/packages/backend/src/core/SignupService.ts
index de45898328..cc8a3d6461 100644
--- a/packages/backend/src/core/SignupService.ts
+++ b/packages/backend/src/core/SignupService.ts
@@ -8,7 +8,7 @@ import { Inject, Injectable } from '@nestjs/common';
 import bcrypt from 'bcryptjs';
 import { DataSource, IsNull } from 'typeorm';
 import { DI } from '@/di-symbols.js';
-import type { UsedUsernamesRepository, UsersRepository } from '@/models/_.js';
+import type { MiMeta, UsedUsernamesRepository, UsersRepository } from '@/models/_.js';
 import { MiUser } from '@/models/User.js';
 import { MiUserProfile } from '@/models/UserProfile.js';
 import { IdService } from '@/core/IdService.js';
@@ -20,7 +20,6 @@ import { InstanceActorService } from '@/core/InstanceActorService.js';
 import { bindThis } from '@/decorators.js';
 import UsersChart from '@/core/chart/charts/users.js';
 import { UtilityService } from '@/core/UtilityService.js';
-import { MetaService } from '@/core/MetaService.js';
 import { UserService } from '@/core/UserService.js';
 
 @Injectable()
@@ -29,6 +28,9 @@ export class SignupService {
 		@Inject(DI.db)
 		private db: DataSource,
 
+		@Inject(DI.meta)
+		private meta: MiMeta,
+
 		@Inject(DI.usersRepository)
 		private usersRepository: UsersRepository,
 
@@ -39,7 +41,6 @@ export class SignupService {
 		private userService: UserService,
 		private userEntityService: UserEntityService,
 		private idService: IdService,
-		private metaService: MetaService,
 		private instanceActorService: InstanceActorService,
 		private usersChart: UsersChart,
 	) {
@@ -88,8 +89,7 @@ export class SignupService {
 		const isTheFirstUser = !await this.instanceActorService.realLocalUsersPresent();
 
 		if (!opts.ignorePreservedUsernames && !isTheFirstUser) {
-			const instance = await this.metaService.fetch(true);
-			const isPreserved = instance.preservedUsernames.map(x => x.toLowerCase()).includes(username.toLowerCase());
+			const isPreserved = this.meta.preservedUsernames.map(x => x.toLowerCase()).includes(username.toLowerCase());
 			if (isPreserved) {
 				throw new Error('USED_USERNAME');
 			}
diff --git a/packages/backend/src/core/UserFollowingService.ts b/packages/backend/src/core/UserFollowingService.ts
index 6aab8fde70..3f1c6b7125 100644
--- a/packages/backend/src/core/UserFollowingService.ts
+++ b/packages/backend/src/core/UserFollowingService.ts
@@ -13,23 +13,20 @@ import PerUserFollowingChart from '@/core/chart/charts/per-user-following.js';
 import { GlobalEventService } from '@/core/GlobalEventService.js';
 import { IdService } from '@/core/IdService.js';
 import { isDuplicateKeyValueError } from '@/misc/is-duplicate-key-value-error.js';
-import type { Packed } from '@/misc/json-schema.js';
 import InstanceChart from '@/core/chart/charts/instance.js';
 import { FederatedInstanceService } from '@/core/FederatedInstanceService.js';
 import { UserWebhookService } from '@/core/UserWebhookService.js';
 import { NotificationService } from '@/core/NotificationService.js';
 import { DI } from '@/di-symbols.js';
-import type { FollowingsRepository, FollowRequestsRepository, InstancesRepository, UserProfilesRepository, UsersRepository } from '@/models/_.js';
+import type { FollowingsRepository, FollowRequestsRepository, InstancesRepository, MiMeta, UserProfilesRepository, UsersRepository } from '@/models/_.js';
 import { UserEntityService } from '@/core/entities/UserEntityService.js';
 import { ApRendererService } from '@/core/activitypub/ApRendererService.js';
 import { bindThis } from '@/decorators.js';
 import { UserBlockingService } from '@/core/UserBlockingService.js';
-import { MetaService } from '@/core/MetaService.js';
 import { CacheService } from '@/core/CacheService.js';
 import type { Config } from '@/config.js';
 import { AccountMoveService } from '@/core/AccountMoveService.js';
 import { UtilityService } from '@/core/UtilityService.js';
-import { FanoutTimelineService } from '@/core/FanoutTimelineService.js';
 import type { ThinUser } from '@/queue/types.js';
 import Logger from '../logger.js';
 
@@ -58,6 +55,9 @@ export class UserFollowingService implements OnModuleInit {
 		@Inject(DI.config)
 		private config: Config,
 
+		@Inject(DI.meta)
+		private meta: MiMeta,
+
 		@Inject(DI.usersRepository)
 		private usersRepository: UsersRepository,
 
@@ -79,13 +79,11 @@ export class UserFollowingService implements OnModuleInit {
 		private idService: IdService,
 		private queueService: QueueService,
 		private globalEventService: GlobalEventService,
-		private metaService: MetaService,
 		private notificationService: NotificationService,
 		private federatedInstanceService: FederatedInstanceService,
 		private webhookService: UserWebhookService,
 		private apRendererService: ApRendererService,
 		private accountMoveService: AccountMoveService,
-		private fanoutTimelineService: FanoutTimelineService,
 		private perUserFollowingChart: PerUserFollowingChart,
 		private instanceChart: InstanceChart,
 	) {
@@ -172,7 +170,7 @@ export class UserFollowingService implements OnModuleInit {
 			followee.isLocked ||
 			(followeeProfile.carefulBot && follower.isBot) ||
 			(this.userEntityService.isLocalUser(follower) && this.userEntityService.isRemoteUser(followee) && process.env.FORCE_FOLLOW_REMOTE_USER_FOR_TESTING !== 'true') ||
-			(this.userEntityService.isLocalUser(followee) && this.userEntityService.isRemoteUser(follower) && this.utilityService.isSilencedHost((await this.metaService.fetch()).silencedHosts, follower.host))
+			(this.userEntityService.isLocalUser(followee) && this.userEntityService.isRemoteUser(follower) && this.utilityService.isSilencedHost(this.meta.silencedHosts, follower.host))
 		) {
 			let autoAccept = false;
 
@@ -307,14 +305,14 @@ export class UserFollowingService implements OnModuleInit {
 			if (this.userEntityService.isRemoteUser(follower) && this.userEntityService.isLocalUser(followee)) {
 				this.federatedInstanceService.fetch(follower.host).then(async i => {
 					this.instancesRepository.increment({ id: i.id }, 'followingCount', 1);
-					if ((await this.metaService.fetch()).enableChartsForFederatedInstances) {
+					if (this.meta.enableChartsForFederatedInstances) {
 						this.instanceChart.updateFollowing(i.host, true);
 					}
 				});
 			} else if (this.userEntityService.isLocalUser(follower) && this.userEntityService.isRemoteUser(followee)) {
 				this.federatedInstanceService.fetch(followee.host).then(async i => {
 					this.instancesRepository.increment({ id: i.id }, 'followersCount', 1);
-					if ((await this.metaService.fetch()).enableChartsForFederatedInstances) {
+					if (this.meta.enableChartsForFederatedInstances) {
 						this.instanceChart.updateFollowers(i.host, true);
 					}
 				});
@@ -439,14 +437,14 @@ export class UserFollowingService implements OnModuleInit {
 			if (this.userEntityService.isRemoteUser(follower) && this.userEntityService.isLocalUser(followee)) {
 				this.federatedInstanceService.fetch(follower.host).then(async i => {
 					this.instancesRepository.decrement({ id: i.id }, 'followingCount', 1);
-					if ((await this.metaService.fetch()).enableChartsForFederatedInstances) {
+					if (this.meta.enableChartsForFederatedInstances) {
 						this.instanceChart.updateFollowing(i.host, false);
 					}
 				});
 			} else if (this.userEntityService.isLocalUser(follower) && this.userEntityService.isRemoteUser(followee)) {
 				this.federatedInstanceService.fetch(followee.host).then(async i => {
 					this.instancesRepository.decrement({ id: i.id }, 'followersCount', 1);
-					if ((await this.metaService.fetch()).enableChartsForFederatedInstances) {
+					if (this.meta.enableChartsForFederatedInstances) {
 						this.instanceChart.updateFollowers(i.host, false);
 					}
 				});
diff --git a/packages/backend/src/core/WebAuthnService.ts b/packages/backend/src/core/WebAuthnService.ts
index ec9f4484a4..a40c6ff1c9 100644
--- a/packages/backend/src/core/WebAuthnService.ts
+++ b/packages/backend/src/core/WebAuthnService.ts
@@ -12,10 +12,9 @@ import {
 } from '@simplewebauthn/server';
 import { AttestationFormat, isoCBOR, isoUint8Array } from '@simplewebauthn/server/helpers';
 import { DI } from '@/di-symbols.js';
-import type { UserSecurityKeysRepository } from '@/models/_.js';
+import type { MiMeta, UserSecurityKeysRepository } from '@/models/_.js';
 import type { Config } from '@/config.js';
 import { bindThis } from '@/decorators.js';
-import { MetaService } from '@/core/MetaService.js';
 import { MiUser } from '@/models/_.js';
 import { IdentifiableError } from '@/misc/identifiable-error.js';
 import type {
@@ -23,7 +22,6 @@ import type {
 	AuthenticatorTransportFuture,
 	CredentialDeviceType,
 	PublicKeyCredentialCreationOptionsJSON,
-	PublicKeyCredentialDescriptorFuture,
 	PublicKeyCredentialRequestOptionsJSON,
 	RegistrationResponseJSON,
 } from '@simplewebauthn/types';
@@ -31,33 +29,33 @@ import type {
 @Injectable()
 export class WebAuthnService {
 	constructor(
-		@Inject(DI.redis)
-		private redisClient: Redis.Redis,
-
 		@Inject(DI.config)
 		private config: Config,
 
+		@Inject(DI.meta)
+		private meta: MiMeta,
+
+		@Inject(DI.redis)
+		private redisClient: Redis.Redis,
+
 		@Inject(DI.userSecurityKeysRepository)
 		private userSecurityKeysRepository: UserSecurityKeysRepository,
-
-		private metaService: MetaService,
 	) {
 	}
 
 	@bindThis
-	public async getRelyingParty(): Promise<{ origin: string; rpId: string; rpName: string; rpIcon?: string; }> {
-		const instance = await this.metaService.fetch();
+	public getRelyingParty(): { origin: string; rpId: string; rpName: string; rpIcon?: string; } {
 		return {
 			origin: this.config.url,
 			rpId: this.config.hostname,
-			rpName: instance.name ?? this.config.host,
-			rpIcon: instance.iconUrl ?? undefined,
+			rpName: this.meta.name ?? this.config.host,
+			rpIcon: this.meta.iconUrl ?? undefined,
 		};
 	}
 
 	@bindThis
 	public async initiateRegistration(userId: MiUser['id'], userName: string, userDisplayName?: string): Promise<PublicKeyCredentialCreationOptionsJSON> {
-		const relyingParty = await this.getRelyingParty();
+		const relyingParty = this.getRelyingParty();
 		const keys = await this.userSecurityKeysRepository.findBy({
 			userId: userId,
 		});
@@ -104,7 +102,7 @@ export class WebAuthnService {
 
 		await this.redisClient.del(`webauthn:challenge:${userId}`);
 
-		const relyingParty = await this.getRelyingParty();
+		const relyingParty = this.getRelyingParty();
 
 		let verification;
 		try {
@@ -143,7 +141,7 @@ export class WebAuthnService {
 
 	@bindThis
 	public async initiateAuthentication(userId: MiUser['id']): Promise<PublicKeyCredentialRequestOptionsJSON> {
-		const relyingParty = await this.getRelyingParty();
+		const relyingParty = this.getRelyingParty();
 		const keys = await this.userSecurityKeysRepository.findBy({
 			userId: userId,
 		});
@@ -209,7 +207,7 @@ export class WebAuthnService {
 			}
 		}
 
-		const relyingParty = await this.getRelyingParty();
+		const relyingParty = this.getRelyingParty();
 
 		let verification;
 		try {
diff --git a/packages/backend/src/core/activitypub/ApInboxService.ts b/packages/backend/src/core/activitypub/ApInboxService.ts
index e2164fec1d..90da032895 100644
--- a/packages/backend/src/core/activitypub/ApInboxService.ts
+++ b/packages/backend/src/core/activitypub/ApInboxService.ts
@@ -17,14 +17,13 @@ import { NoteCreateService } from '@/core/NoteCreateService.js';
 import { concat, toArray, toSingle, unique } from '@/misc/prelude/array.js';
 import { AppLockService } from '@/core/AppLockService.js';
 import type Logger from '@/logger.js';
-import { MetaService } from '@/core/MetaService.js';
 import { IdService } from '@/core/IdService.js';
 import { StatusError } from '@/misc/status-error.js';
 import { UtilityService } from '@/core/UtilityService.js';
 import { NoteEntityService } from '@/core/entities/NoteEntityService.js';
 import { UserEntityService } from '@/core/entities/UserEntityService.js';
 import { QueueService } from '@/core/QueueService.js';
-import type { UsersRepository, NotesRepository, FollowingsRepository, AbuseUserReportsRepository, FollowRequestsRepository } from '@/models/_.js';
+import type { UsersRepository, NotesRepository, FollowingsRepository, AbuseUserReportsRepository, FollowRequestsRepository, MiMeta } from '@/models/_.js';
 import { bindThis } from '@/decorators.js';
 import type { MiRemoteUser } from '@/models/User.js';
 import { GlobalEventService } from '@/core/GlobalEventService.js';
@@ -48,6 +47,9 @@ export class ApInboxService {
 		@Inject(DI.config)
 		private config: Config,
 
+		@Inject(DI.meta)
+		private meta: MiMeta,
+
 		@Inject(DI.usersRepository)
 		private usersRepository: UsersRepository,
 
@@ -64,7 +66,6 @@ export class ApInboxService {
 		private noteEntityService: NoteEntityService,
 		private utilityService: UtilityService,
 		private idService: IdService,
-		private metaService: MetaService,
 		private abuseReportService: AbuseReportService,
 		private userFollowingService: UserFollowingService,
 		private apAudienceService: ApAudienceService,
@@ -290,8 +291,7 @@ export class ApInboxService {
 		}
 
 		// アナウンス先をブロックしてたら中断
-		const meta = await this.metaService.fetch();
-		if (this.utilityService.isBlockedHost(meta.blockedHosts, this.utilityService.extractDbHost(uri))) return;
+		if (this.utilityService.isBlockedHost(this.meta.blockedHosts, this.utilityService.extractDbHost(uri))) return;
 
 		const unlock = await this.appLockService.getApLock(uri);
 
diff --git a/packages/backend/src/core/activitypub/ApResolverService.ts b/packages/backend/src/core/activitypub/ApResolverService.ts
index bb3c40f093..fdef7a8ffd 100644
--- a/packages/backend/src/core/activitypub/ApResolverService.ts
+++ b/packages/backend/src/core/activitypub/ApResolverService.ts
@@ -7,9 +7,8 @@ import { Inject, Injectable } from '@nestjs/common';
 import { IsNull, Not } from 'typeorm';
 import type { MiLocalUser, MiRemoteUser } from '@/models/User.js';
 import { InstanceActorService } from '@/core/InstanceActorService.js';
-import type { NotesRepository, PollsRepository, NoteReactionsRepository, UsersRepository, FollowRequestsRepository } from '@/models/_.js';
+import type { NotesRepository, PollsRepository, NoteReactionsRepository, UsersRepository, FollowRequestsRepository, MiMeta } from '@/models/_.js';
 import type { Config } from '@/config.js';
-import { MetaService } from '@/core/MetaService.js';
 import { HttpRequestService } from '@/core/HttpRequestService.js';
 import { DI } from '@/di-symbols.js';
 import { UtilityService } from '@/core/UtilityService.js';
@@ -29,6 +28,7 @@ export class Resolver {
 
 	constructor(
 		private config: Config,
+		private meta: MiMeta,
 		private usersRepository: UsersRepository,
 		private notesRepository: NotesRepository,
 		private pollsRepository: PollsRepository,
@@ -36,7 +36,6 @@ export class Resolver {
 		private followRequestsRepository: FollowRequestsRepository,
 		private utilityService: UtilityService,
 		private instanceActorService: InstanceActorService,
-		private metaService: MetaService,
 		private apRequestService: ApRequestService,
 		private httpRequestService: HttpRequestService,
 		private apRendererService: ApRendererService,
@@ -94,8 +93,7 @@ export class Resolver {
 			return await this.resolveLocal(value);
 		}
 
-		const meta = await this.metaService.fetch();
-		if (this.utilityService.isBlockedHost(meta.blockedHosts, host)) {
+		if (this.utilityService.isBlockedHost(this.meta.blockedHosts, host)) {
 			throw new Error('Instance is blocked');
 		}
 
@@ -178,6 +176,9 @@ export class ApResolverService {
 		@Inject(DI.config)
 		private config: Config,
 
+		@Inject(DI.meta)
+		private meta: MiMeta,
+
 		@Inject(DI.usersRepository)
 		private usersRepository: UsersRepository,
 
@@ -195,7 +196,6 @@ export class ApResolverService {
 
 		private utilityService: UtilityService,
 		private instanceActorService: InstanceActorService,
-		private metaService: MetaService,
 		private apRequestService: ApRequestService,
 		private httpRequestService: HttpRequestService,
 		private apRendererService: ApRendererService,
@@ -208,6 +208,7 @@ export class ApResolverService {
 	public createResolver(): Resolver {
 		return new Resolver(
 			this.config,
+			this.meta,
 			this.usersRepository,
 			this.notesRepository,
 			this.pollsRepository,
@@ -215,7 +216,6 @@ export class ApResolverService {
 			this.followRequestsRepository,
 			this.utilityService,
 			this.instanceActorService,
-			this.metaService,
 			this.apRequestService,
 			this.httpRequestService,
 			this.apRendererService,
diff --git a/packages/backend/src/core/activitypub/models/ApImageService.ts b/packages/backend/src/core/activitypub/models/ApImageService.ts
index 3691967270..e7ece87b01 100644
--- a/packages/backend/src/core/activitypub/models/ApImageService.ts
+++ b/packages/backend/src/core/activitypub/models/ApImageService.ts
@@ -5,10 +5,9 @@
 
 import { Inject, Injectable } from '@nestjs/common';
 import { DI } from '@/di-symbols.js';
-import type { DriveFilesRepository } from '@/models/_.js';
+import type { DriveFilesRepository, MiMeta } from '@/models/_.js';
 import type { MiRemoteUser } from '@/models/User.js';
 import type { MiDriveFile } from '@/models/DriveFile.js';
-import { MetaService } from '@/core/MetaService.js';
 import { truncate } from '@/misc/truncate.js';
 import { DB_MAX_IMAGE_COMMENT_LENGTH } from '@/const.js';
 import { DriveService } from '@/core/DriveService.js';
@@ -24,10 +23,12 @@ export class ApImageService {
 	private logger: Logger;
 
 	constructor(
+		@Inject(DI.meta)
+		private meta: MiMeta,
+
 		@Inject(DI.driveFilesRepository)
 		private driveFilesRepository: DriveFilesRepository,
 
-		private metaService: MetaService,
 		private apResolverService: ApResolverService,
 		private driveService: DriveService,
 		private apLoggerService: ApLoggerService,
@@ -63,12 +64,10 @@ export class ApImageService {
 
 		this.logger.info(`Creating the Image: ${image.url}`);
 
-		const instance = await this.metaService.fetch();
-
 		// Cache if remote file cache is on AND either
 		// 1. remote sensitive file is also on
 		// 2. or the image is not sensitive
-		const shouldBeCached = instance.cacheRemoteFiles && (instance.cacheRemoteSensitiveFiles || !image.sensitive);
+		const shouldBeCached = this.meta.cacheRemoteFiles && (this.meta.cacheRemoteSensitiveFiles || !image.sensitive);
 
 		const file = await this.driveService.uploadFromUrl({
 			url: image.url,
diff --git a/packages/backend/src/core/activitypub/models/ApNoteService.ts b/packages/backend/src/core/activitypub/models/ApNoteService.ts
index 5b75da22a0..00acb19a0f 100644
--- a/packages/backend/src/core/activitypub/models/ApNoteService.ts
+++ b/packages/backend/src/core/activitypub/models/ApNoteService.ts
@@ -6,13 +6,12 @@
 import { forwardRef, Inject, Injectable } from '@nestjs/common';
 import { In } from 'typeorm';
 import { DI } from '@/di-symbols.js';
-import type { PollsRepository, EmojisRepository } from '@/models/_.js';
+import type { PollsRepository, EmojisRepository, MiMeta } from '@/models/_.js';
 import type { Config } from '@/config.js';
 import type { MiRemoteUser } from '@/models/User.js';
 import type { MiNote } from '@/models/Note.js';
 import { toArray, toSingle, unique } from '@/misc/prelude/array.js';
 import type { MiEmoji } from '@/models/Emoji.js';
-import { MetaService } from '@/core/MetaService.js';
 import { AppLockService } from '@/core/AppLockService.js';
 import type { MiDriveFile } from '@/models/DriveFile.js';
 import { NoteCreateService } from '@/core/NoteCreateService.js';
@@ -46,6 +45,9 @@ export class ApNoteService {
 		@Inject(DI.config)
 		private config: Config,
 
+		@Inject(DI.meta)
+		private meta: MiMeta,
+
 		@Inject(DI.pollsRepository)
 		private pollsRepository: PollsRepository,
 
@@ -65,7 +67,6 @@ export class ApNoteService {
 		private apMentionService: ApMentionService,
 		private apImageService: ApImageService,
 		private apQuestionService: ApQuestionService,
-		private metaService: MetaService,
 		private appLockService: AppLockService,
 		private pollService: PollService,
 		private noteCreateService: NoteCreateService,
@@ -182,7 +183,7 @@ export class ApNoteService {
 		/**
 		 * 禁止ワードチェック
 		 */
-		const hasProhibitedWords = await this.noteCreateService.checkProhibitedWordsContain({ cw, text, pollChoices: poll?.choices });
+		const hasProhibitedWords = this.noteCreateService.checkProhibitedWordsContain({ cw, text, pollChoices: poll?.choices });
 		if (hasProhibitedWords) {
 			throw new IdentifiableError('689ee33f-f97c-479a-ac49-1b9f8140af99', 'Note contains prohibited words');
 		}
@@ -336,8 +337,7 @@ export class ApNoteService {
 		const uri = getApId(value);
 
 		// ブロックしていたら中断
-		const meta = await this.metaService.fetch();
-		if (this.utilityService.isBlockedHost(meta.blockedHosts, this.utilityService.extractDbHost(uri))) {
+		if (this.utilityService.isBlockedHost(this.meta.blockedHosts, this.utilityService.extractDbHost(uri))) {
 			throw new StatusError('blocked host', 451);
 		}
 
diff --git a/packages/backend/src/core/activitypub/models/ApPersonService.ts b/packages/backend/src/core/activitypub/models/ApPersonService.ts
index f3ddf3952c..39c18e5e15 100644
--- a/packages/backend/src/core/activitypub/models/ApPersonService.ts
+++ b/packages/backend/src/core/activitypub/models/ApPersonService.ts
@@ -8,7 +8,7 @@ import promiseLimit from 'promise-limit';
 import { DataSource } from 'typeorm';
 import { ModuleRef } from '@nestjs/core';
 import { DI } from '@/di-symbols.js';
-import type { FollowingsRepository, InstancesRepository, UserProfilesRepository, UserPublickeysRepository, UsersRepository } from '@/models/_.js';
+import type { FollowingsRepository, InstancesRepository, MiMeta, UserProfilesRepository, UserPublickeysRepository, UsersRepository } from '@/models/_.js';
 import type { Config } from '@/config.js';
 import type { MiLocalUser, MiRemoteUser } from '@/models/User.js';
 import { MiUser } from '@/models/User.js';
@@ -35,7 +35,6 @@ import type { UtilityService } from '@/core/UtilityService.js';
 import type { UserEntityService } from '@/core/entities/UserEntityService.js';
 import { bindThis } from '@/decorators.js';
 import { RoleService } from '@/core/RoleService.js';
-import { MetaService } from '@/core/MetaService.js';
 import { DriveFileEntityService } from '@/core/entities/DriveFileEntityService.js';
 import type { AccountMoveService } from '@/core/AccountMoveService.js';
 import { checkHttps } from '@/misc/check-https.js';
@@ -62,7 +61,6 @@ export class ApPersonService implements OnModuleInit {
 	private driveFileEntityService: DriveFileEntityService;
 	private idService: IdService;
 	private globalEventService: GlobalEventService;
-	private metaService: MetaService;
 	private federatedInstanceService: FederatedInstanceService;
 	private fetchInstanceMetadataService: FetchInstanceMetadataService;
 	private cacheService: CacheService;
@@ -84,6 +82,9 @@ export class ApPersonService implements OnModuleInit {
 		@Inject(DI.config)
 		private config: Config,
 
+		@Inject(DI.meta)
+		private meta: MiMeta,
+
 		@Inject(DI.db)
 		private db: DataSource,
 
@@ -112,7 +113,6 @@ export class ApPersonService implements OnModuleInit {
 		this.driveFileEntityService = this.moduleRef.get('DriveFileEntityService');
 		this.idService = this.moduleRef.get('IdService');
 		this.globalEventService = this.moduleRef.get('GlobalEventService');
-		this.metaService = this.moduleRef.get('MetaService');
 		this.federatedInstanceService = this.moduleRef.get('FederatedInstanceService');
 		this.fetchInstanceMetadataService = this.moduleRef.get('FetchInstanceMetadataService');
 		this.cacheService = this.moduleRef.get('CacheService');
@@ -407,10 +407,10 @@ export class ApPersonService implements OnModuleInit {
 		this.cacheService.uriPersonCache.set(user.uri, user);
 
 		// Register host
-		this.federatedInstanceService.fetch(host).then(async i => {
+		this.federatedInstanceService.fetch(host).then(i => {
 			this.instancesRepository.increment({ id: i.id }, 'usersCount', 1);
 			this.fetchInstanceMetadataService.fetchInstanceMetadata(i);
-			if ((await this.metaService.fetch()).enableChartsForFederatedInstances) {
+			if (this.meta.enableChartsForFederatedInstances) {
 				this.instanceChart.newUser(i.host);
 			}
 		});
diff --git a/packages/backend/src/core/chart/charts/federation.ts b/packages/backend/src/core/chart/charts/federation.ts
index f40a26495d..c9b43cc66d 100644
--- a/packages/backend/src/core/chart/charts/federation.ts
+++ b/packages/backend/src/core/chart/charts/federation.ts
@@ -5,10 +5,9 @@
 
 import { Injectable, Inject } from '@nestjs/common';
 import { DataSource } from 'typeorm';
-import type { FollowingsRepository, InstancesRepository } from '@/models/_.js';
+import type { FollowingsRepository, InstancesRepository, MiMeta } from '@/models/_.js';
 import { AppLockService } from '@/core/AppLockService.js';
 import { DI } from '@/di-symbols.js';
-import { MetaService } from '@/core/MetaService.js';
 import { bindThis } from '@/decorators.js';
 import Chart from '../core.js';
 import { ChartLoggerService } from '../ChartLoggerService.js';
@@ -24,13 +23,15 @@ export default class FederationChart extends Chart<typeof schema> { // eslint-di
 		@Inject(DI.db)
 		private db: DataSource,
 
+		@Inject(DI.meta)
+		private meta: MiMeta,
+
 		@Inject(DI.followingsRepository)
 		private followingsRepository: FollowingsRepository,
 
 		@Inject(DI.instancesRepository)
 		private instancesRepository: InstancesRepository,
 
-		private metaService: MetaService,
 		private appLockService: AppLockService,
 		private chartLoggerService: ChartLoggerService,
 	) {
@@ -43,8 +44,6 @@ export default class FederationChart extends Chart<typeof schema> { // eslint-di
 	}
 
 	protected async tickMinor(): Promise<Partial<KVs<typeof schema>>> {
-		const meta = await this.metaService.fetch();
-
 		const suspendedInstancesQuery = this.instancesRepository.createQueryBuilder('instance')
 			.select('instance.host')
 			.where('instance.suspensionState != \'none\'');
@@ -65,21 +64,21 @@ export default class FederationChart extends Chart<typeof schema> { // eslint-di
 			this.followingsRepository.createQueryBuilder('following')
 				.select('COUNT(DISTINCT following.followeeHost)')
 				.where('following.followeeHost IS NOT NULL')
-				.andWhere(meta.blockedHosts.length === 0 ? '1=1' : 'following.followeeHost NOT ILIKE ALL(ARRAY[:...blocked])', { blocked: meta.blockedHosts.flatMap(x => [x, `%.${x}`]) })
+				.andWhere(this.meta.blockedHosts.length === 0 ? '1=1' : 'following.followeeHost NOT ILIKE ALL(ARRAY[:...blocked])', { blocked: this.meta.blockedHosts.flatMap(x => [x, `%.${x}`]) })
 				.andWhere(`following.followeeHost NOT IN (${ suspendedInstancesQuery.getQuery() })`)
 				.getRawOne()
 				.then(x => parseInt(x.count, 10)),
 			this.followingsRepository.createQueryBuilder('following')
 				.select('COUNT(DISTINCT following.followerHost)')
 				.where('following.followerHost IS NOT NULL')
-				.andWhere(meta.blockedHosts.length === 0 ? '1=1' : 'following.followerHost NOT ILIKE ALL(ARRAY[:...blocked])', { blocked: meta.blockedHosts.flatMap(x => [x, `%.${x}`]) })
+				.andWhere(this.meta.blockedHosts.length === 0 ? '1=1' : 'following.followerHost NOT ILIKE ALL(ARRAY[:...blocked])', { blocked: this.meta.blockedHosts.flatMap(x => [x, `%.${x}`]) })
 				.andWhere(`following.followerHost NOT IN (${ suspendedInstancesQuery.getQuery() })`)
 				.getRawOne()
 				.then(x => parseInt(x.count, 10)),
 			this.followingsRepository.createQueryBuilder('following')
 				.select('COUNT(DISTINCT following.followeeHost)')
 				.where('following.followeeHost IS NOT NULL')
-				.andWhere(meta.blockedHosts.length === 0 ? '1=1' : 'following.followeeHost NOT ILIKE ALL(ARRAY[:...blocked])', { blocked: meta.blockedHosts.flatMap(x => [x, `%.${x}`]) })
+				.andWhere(this.meta.blockedHosts.length === 0 ? '1=1' : 'following.followeeHost NOT ILIKE ALL(ARRAY[:...blocked])', { blocked: this.meta.blockedHosts.flatMap(x => [x, `%.${x}`]) })
 				.andWhere(`following.followeeHost NOT IN (${ suspendedInstancesQuery.getQuery() })`)
 				.andWhere(`following.followeeHost IN (${ pubsubSubQuery.getQuery() })`)
 				.setParameters(pubsubSubQuery.getParameters())
@@ -88,7 +87,7 @@ export default class FederationChart extends Chart<typeof schema> { // eslint-di
 			this.instancesRepository.createQueryBuilder('instance')
 				.select('COUNT(instance.id)')
 				.where(`instance.host IN (${ subInstancesQuery.getQuery() })`)
-				.andWhere(meta.blockedHosts.length === 0 ? '1=1' : 'instance.host NOT ILIKE ALL(ARRAY[:...blocked])', { blocked: meta.blockedHosts.flatMap(x => [x, `%.${x}`]) })
+				.andWhere(this.meta.blockedHosts.length === 0 ? '1=1' : 'instance.host NOT ILIKE ALL(ARRAY[:...blocked])', { blocked: this.meta.blockedHosts.flatMap(x => [x, `%.${x}`]) })
 				.andWhere('instance.suspensionState = \'none\'')
 				.andWhere('instance.isNotResponding = false')
 				.getRawOne()
@@ -96,7 +95,7 @@ export default class FederationChart extends Chart<typeof schema> { // eslint-di
 			this.instancesRepository.createQueryBuilder('instance')
 				.select('COUNT(instance.id)')
 				.where(`instance.host IN (${ pubInstancesQuery.getQuery() })`)
-				.andWhere(meta.blockedHosts.length === 0 ? '1=1' : 'instance.host NOT ILIKE ALL(ARRAY[:...blocked])', { blocked: meta.blockedHosts.flatMap(x => [x, `%.${x}`]) })
+				.andWhere(this.meta.blockedHosts.length === 0 ? '1=1' : 'instance.host NOT ILIKE ALL(ARRAY[:...blocked])', { blocked: this.meta.blockedHosts.flatMap(x => [x, `%.${x}`]) })
 				.andWhere('instance.suspensionState = \'none\'')
 				.andWhere('instance.isNotResponding = false')
 				.getRawOne()
diff --git a/packages/backend/src/core/entities/InstanceEntityService.ts b/packages/backend/src/core/entities/InstanceEntityService.ts
index 4956bc22ce..284537b986 100644
--- a/packages/backend/src/core/entities/InstanceEntityService.ts
+++ b/packages/backend/src/core/entities/InstanceEntityService.ts
@@ -3,19 +3,22 @@
  * SPDX-License-Identifier: AGPL-3.0-only
  */
 
-import { Injectable } from '@nestjs/common';
+import { Inject, Injectable } from '@nestjs/common';
 import type { Packed } from '@/misc/json-schema.js';
 import type { MiInstance } from '@/models/Instance.js';
-import { MetaService } from '@/core/MetaService.js';
 import { bindThis } from '@/decorators.js';
 import { UtilityService } from '@/core/UtilityService.js';
 import { RoleService } from '@/core/RoleService.js';
 import { MiUser } from '@/models/User.js';
+import { DI } from '@/di-symbols.js';
+import { MiMeta } from '@/models/_.js';
 
 @Injectable()
 export class InstanceEntityService {
 	constructor(
-		private metaService: MetaService,
+		@Inject(DI.meta)
+		private meta: MiMeta,
+
 		private roleService: RoleService,
 
 		private utilityService: UtilityService,
@@ -27,7 +30,6 @@ export class InstanceEntityService {
 		instance: MiInstance,
 		me?: { id: MiUser['id']; } | null | undefined,
 	): Promise<Packed<'FederationInstance'>> {
-		const meta = await this.metaService.fetch();
 		const iAmModerator = me ? await this.roleService.isModerator(me as MiUser) : false;
 
 		return {
@@ -41,7 +43,7 @@ export class InstanceEntityService {
 			isNotResponding: instance.isNotResponding,
 			isSuspended: instance.suspensionState !== 'none',
 			suspensionState: instance.suspensionState,
-			isBlocked: this.utilityService.isBlockedHost(meta.blockedHosts, instance.host),
+			isBlocked: this.utilityService.isBlockedHost(this.meta.blockedHosts, instance.host),
 			softwareName: instance.softwareName,
 			softwareVersion: instance.softwareVersion,
 			openRegistrations: instance.openRegistrations,
@@ -49,8 +51,8 @@ export class InstanceEntityService {
 			description: instance.description,
 			maintainerName: instance.maintainerName,
 			maintainerEmail: instance.maintainerEmail,
-			isSilenced: this.utilityService.isSilencedHost(meta.silencedHosts, instance.host),
-			isMediaSilenced: this.utilityService.isMediaSilencedHost(meta.mediaSilencedHosts, instance.host),
+			isSilenced: this.utilityService.isSilencedHost(this.meta.silencedHosts, instance.host),
+			isMediaSilenced: this.utilityService.isMediaSilencedHost(this.meta.mediaSilencedHosts, instance.host),
 			iconUrl: instance.iconUrl,
 			faviconUrl: instance.faviconUrl,
 			themeColor: instance.themeColor,
diff --git a/packages/backend/src/core/entities/MetaEntityService.ts b/packages/backend/src/core/entities/MetaEntityService.ts
index f4b1e302d0..fbd982eb34 100644
--- a/packages/backend/src/core/entities/MetaEntityService.ts
+++ b/packages/backend/src/core/entities/MetaEntityService.ts
@@ -10,7 +10,6 @@ import type { Packed } from '@/misc/json-schema.js';
 import type { MiMeta } from '@/models/Meta.js';
 import type { AdsRepository } from '@/models/_.js';
 import { MAX_NOTE_TEXT_LENGTH } from '@/const.js';
-import { MetaService } from '@/core/MetaService.js';
 import { bindThis } from '@/decorators.js';
 import { UserEntityService } from '@/core/entities/UserEntityService.js';
 import { InstanceActorService } from '@/core/InstanceActorService.js';
@@ -24,11 +23,13 @@ export class MetaEntityService {
 		@Inject(DI.config)
 		private config: Config,
 
+		@Inject(DI.meta)
+		private meta: MiMeta,
+
 		@Inject(DI.adsRepository)
 		private adsRepository: AdsRepository,
 
 		private userEntityService: UserEntityService,
-		private metaService: MetaService,
 		private instanceActorService: InstanceActorService,
 	) { }
 
@@ -37,7 +38,7 @@ export class MetaEntityService {
 		let instance = meta;
 
 		if (!instance) {
-			instance = await this.metaService.fetch();
+			instance = this.meta;
 		}
 
 		const ads = await this.adsRepository.createQueryBuilder('ads')
@@ -140,7 +141,7 @@ export class MetaEntityService {
 		let instance = meta;
 
 		if (!instance) {
-			instance = await this.metaService.fetch();
+			instance = this.meta;
 		}
 
 		const packed = await this.pack(instance);
diff --git a/packages/backend/src/core/entities/NoteEntityService.ts b/packages/backend/src/core/entities/NoteEntityService.ts
index 0d0b80765a..65a47d7591 100644
--- a/packages/backend/src/core/entities/NoteEntityService.ts
+++ b/packages/backend/src/core/entities/NoteEntityService.ts
@@ -11,7 +11,7 @@ import type { Packed } from '@/misc/json-schema.js';
 import { awaitAll } from '@/misc/prelude/await-all.js';
 import type { MiUser } from '@/models/User.js';
 import type { MiNote } from '@/models/Note.js';
-import type { UsersRepository, NotesRepository, FollowingsRepository, PollsRepository, PollVotesRepository, NoteReactionsRepository, ChannelsRepository } from '@/models/_.js';
+import type { UsersRepository, NotesRepository, FollowingsRepository, PollsRepository, PollVotesRepository, NoteReactionsRepository, ChannelsRepository, MiMeta } from '@/models/_.js';
 import { bindThis } from '@/decorators.js';
 import { DebounceLoader } from '@/misc/loader.js';
 import { IdService } from '@/core/IdService.js';
@@ -43,12 +43,14 @@ export class NoteEntityService implements OnModuleInit {
 	private reactionService: ReactionService;
 	private reactionsBufferingService: ReactionsBufferingService;
 	private idService: IdService;
-	private metaService: MetaService;
 	private noteLoader = new DebounceLoader(this.findNoteOrFail);
 
 	constructor(
 		private moduleRef: ModuleRef,
 
+		@Inject(DI.meta)
+		private meta: MiMeta,
+
 		@Inject(DI.usersRepository)
 		private usersRepository: UsersRepository,
 
@@ -76,7 +78,6 @@ export class NoteEntityService implements OnModuleInit {
 		//private reactionService: ReactionService,
 		//private reactionsBufferingService: ReactionsBufferingService,
 		//private idService: IdService,
-		//private metaService: MetaService,
 	) {
 	}
 
@@ -87,7 +88,6 @@ export class NoteEntityService implements OnModuleInit {
 		this.reactionService = this.moduleRef.get('ReactionService');
 		this.reactionsBufferingService = this.moduleRef.get('ReactionsBufferingService');
 		this.idService = this.moduleRef.get('IdService');
-		this.metaService = this.moduleRef.get('MetaService');
 	}
 
 	@bindThis
@@ -324,11 +324,9 @@ export class NoteEntityService implements OnModuleInit {
 		const note = typeof src === 'object' ? src : await this.noteLoader.load(src);
 		const host = note.userHost;
 
-		const meta = await this.metaService.fetch();
-
 		const bufferdReactions = opts._hint_?.bufferdReactions != null
 			? (opts._hint_.bufferdReactions.get(note.id) ?? { deltas: {}, pairs: [] })
-			: meta.enableReactionsBuffering
+			: this.meta.enableReactionsBuffering
 				? await this.reactionsBufferingService.get(note.id)
 				: { deltas: {}, pairs: [] };
 		const reactions = mergeReactions(note.reactions, bufferdReactions.deltas ?? {});
@@ -441,9 +439,7 @@ export class NoteEntityService implements OnModuleInit {
 	) {
 		if (notes.length === 0) return [];
 
-		const meta = await this.metaService.fetch();
-
-		const bufferdReactions = meta.enableReactionsBuffering ? await this.reactionsBufferingService.getMany(notes.map(x => x.id)) : null;
+		const bufferdReactions = this.meta.enableReactionsBuffering ? await this.reactionsBufferingService.getMany(notes.map(x => x.id)) : null;
 
 		const meId = me ? me.id : null;
 		const myReactionsMap = new Map<MiNote['id'], string | null>();
diff --git a/packages/backend/src/daemons/ServerStatsService.ts b/packages/backend/src/daemons/ServerStatsService.ts
index 2c70344c94..d229efb123 100644
--- a/packages/backend/src/daemons/ServerStatsService.ts
+++ b/packages/backend/src/daemons/ServerStatsService.ts
@@ -3,13 +3,14 @@
  * SPDX-License-Identifier: AGPL-3.0-only
  */
 
-import { Injectable } from '@nestjs/common';
+import { Inject, Injectable } from '@nestjs/common';
 import si from 'systeminformation';
 import Xev from 'xev';
 import * as osUtils from 'os-utils';
 import { bindThis } from '@/decorators.js';
-import { MetaService } from '@/core/MetaService.js';
 import type { OnApplicationShutdown } from '@nestjs/common';
+import { MiMeta } from '@/models/_.js';
+import { DI } from '@/di-symbols.js';
 
 const ev = new Xev();
 
@@ -23,7 +24,8 @@ export class ServerStatsService implements OnApplicationShutdown {
 	private intervalId: NodeJS.Timeout | null = null;
 
 	constructor(
-		private metaService: MetaService,
+		@Inject(DI.meta)
+		private meta: MiMeta,
 	) {
 	}
 
@@ -32,7 +34,7 @@ export class ServerStatsService implements OnApplicationShutdown {
 	 */
 	@bindThis
 	public async start(): Promise<void> {
-		if (!(await this.metaService.fetch(true)).enableServerMachineStats) return;
+		if (!this.meta.enableServerMachineStats) return;
 
 		const log = [] as any[];
 
diff --git a/packages/backend/src/di-symbols.ts b/packages/backend/src/di-symbols.ts
index b6f003c2e6..e599fc7b37 100644
--- a/packages/backend/src/di-symbols.ts
+++ b/packages/backend/src/di-symbols.ts
@@ -6,6 +6,7 @@
 export const DI = {
 	config: Symbol('config'),
 	db: Symbol('db'),
+	meta: Symbol('meta'),
 	meilisearch: Symbol('meilisearch'),
 	redis: Symbol('redis'),
 	redisForPub: Symbol('redisForPub'),
diff --git a/packages/backend/src/queue/processors/BakeBufferedReactionsProcessorService.ts b/packages/backend/src/queue/processors/BakeBufferedReactionsProcessorService.ts
index cd56ba9837..d49c99f694 100644
--- a/packages/backend/src/queue/processors/BakeBufferedReactionsProcessorService.ts
+++ b/packages/backend/src/queue/processors/BakeBufferedReactionsProcessorService.ts
@@ -7,17 +7,20 @@ import { Inject, Injectable } from '@nestjs/common';
 import type Logger from '@/logger.js';
 import { bindThis } from '@/decorators.js';
 import { ReactionsBufferingService } from '@/core/ReactionsBufferingService.js';
-import { MetaService } from '@/core/MetaService.js';
 import { QueueLoggerService } from '../QueueLoggerService.js';
 import type * as Bull from 'bullmq';
+import { MiMeta } from '@/models/_.js';
+import { DI } from '@/di-symbols.js';
 
 @Injectable()
 export class BakeBufferedReactionsProcessorService {
 	private logger: Logger;
 
 	constructor(
+		@Inject(DI.meta)
+		private meta: MiMeta,
+
 		private reactionsBufferingService: ReactionsBufferingService,
-		private metaService: MetaService,
 		private queueLoggerService: QueueLoggerService,
 	) {
 		this.logger = this.queueLoggerService.logger.createSubLogger('bake-buffered-reactions');
@@ -25,8 +28,7 @@ export class BakeBufferedReactionsProcessorService {
 
 	@bindThis
 	public async process(): Promise<void> {
-		const meta = await this.metaService.fetch();
-		if (!meta.enableReactionsBuffering) {
+		if (!this.meta.enableReactionsBuffering) {
 			this.logger.info('Reactions buffering is disabled. Skipping...');
 			return;
 		}
diff --git a/packages/backend/src/queue/processors/DeliverProcessorService.ts b/packages/backend/src/queue/processors/DeliverProcessorService.ts
index 4076e9da90..fc9078251f 100644
--- a/packages/backend/src/queue/processors/DeliverProcessorService.ts
+++ b/packages/backend/src/queue/processors/DeliverProcessorService.ts
@@ -7,9 +7,8 @@ import { Inject, Injectable } from '@nestjs/common';
 import * as Bull from 'bullmq';
 import { Not } from 'typeorm';
 import { DI } from '@/di-symbols.js';
-import type { InstancesRepository } from '@/models/_.js';
+import type { InstancesRepository, MiMeta } from '@/models/_.js';
 import type Logger from '@/logger.js';
-import { MetaService } from '@/core/MetaService.js';
 import { ApRequestService } from '@/core/activitypub/ApRequestService.js';
 import { FederatedInstanceService } from '@/core/FederatedInstanceService.js';
 import { FetchInstanceMetadataService } from '@/core/FetchInstanceMetadataService.js';
@@ -31,10 +30,12 @@ export class DeliverProcessorService {
 	private latest: string | null;
 
 	constructor(
+		@Inject(DI.meta)
+		private meta: MiMeta,
+
 		@Inject(DI.instancesRepository)
 		private instancesRepository: InstancesRepository,
 
-		private metaService: MetaService,
 		private utilityService: UtilityService,
 		private federatedInstanceService: FederatedInstanceService,
 		private fetchInstanceMetadataService: FetchInstanceMetadataService,
@@ -53,8 +54,7 @@ export class DeliverProcessorService {
 		const { host } = new URL(job.data.to);
 
 		// ブロックしてたら中断
-		const meta = await this.metaService.fetch();
-		if (this.utilityService.isBlockedHost(meta.blockedHosts, this.utilityService.toPuny(host))) {
+		if (this.utilityService.isBlockedHost(this.meta.blockedHosts, this.utilityService.toPuny(host))) {
 			return 'skip (blocked)';
 		}
 
@@ -88,7 +88,7 @@ export class DeliverProcessorService {
 				this.apRequestChart.deliverSucc();
 				this.federationChart.deliverd(i.host, true);
 
-				if (meta.enableChartsForFederatedInstances) {
+				if (this.meta.enableChartsForFederatedInstances) {
 					this.instanceChart.requestSent(i.host, true);
 				}
 			});
@@ -120,7 +120,7 @@ export class DeliverProcessorService {
 				this.apRequestChart.deliverFail();
 				this.federationChart.deliverd(i.host, false);
 
-				if (meta.enableChartsForFederatedInstances) {
+				if (this.meta.enableChartsForFederatedInstances) {
 					this.instanceChart.requestSent(i.host, false);
 				}
 			});
diff --git a/packages/backend/src/queue/processors/InboxProcessorService.ts b/packages/backend/src/queue/processors/InboxProcessorService.ts
index fa7009f8f5..2df37bedf4 100644
--- a/packages/backend/src/queue/processors/InboxProcessorService.ts
+++ b/packages/backend/src/queue/processors/InboxProcessorService.ts
@@ -4,11 +4,10 @@
  */
 
 import { URL } from 'node:url';
-import { Injectable } from '@nestjs/common';
+import { Inject, Injectable } from '@nestjs/common';
 import httpSignature from '@peertube/http-signature';
 import * as Bull from 'bullmq';
 import type Logger from '@/logger.js';
-import { MetaService } from '@/core/MetaService.js';
 import { FederatedInstanceService } from '@/core/FederatedInstanceService.js';
 import { FetchInstanceMetadataService } from '@/core/FetchInstanceMetadataService.js';
 import InstanceChart from '@/core/chart/charts/instance.js';
@@ -28,14 +27,18 @@ import { bindThis } from '@/decorators.js';
 import { IdentifiableError } from '@/misc/identifiable-error.js';
 import { QueueLoggerService } from '../QueueLoggerService.js';
 import type { InboxJobData } from '../types.js';
+import { MiMeta } from '@/models/Meta.js';
+import { DI } from '@/di-symbols.js';
 
 @Injectable()
 export class InboxProcessorService {
 	private logger: Logger;
 
 	constructor(
+		@Inject(DI.meta)
+		private meta: MiMeta,
+
 		private utilityService: UtilityService,
-		private metaService: MetaService,
 		private apInboxService: ApInboxService,
 		private federatedInstanceService: FederatedInstanceService,
 		private fetchInstanceMetadataService: FetchInstanceMetadataService,
@@ -64,8 +67,7 @@ export class InboxProcessorService {
 		const host = this.utilityService.toPuny(new URL(signature.keyId).hostname);
 
 		// ブロックしてたら中断
-		const meta = await this.metaService.fetch();
-		if (this.utilityService.isBlockedHost(meta.blockedHosts, host)) {
+		if (this.utilityService.isBlockedHost(this.meta.blockedHosts, host)) {
 			return `Blocked request: ${host}`;
 		}
 
@@ -166,7 +168,7 @@ export class InboxProcessorService {
 
 				// ブロックしてたら中断
 				const ldHost = this.utilityService.extractDbHost(authUser.user.uri);
-				if (this.utilityService.isBlockedHost(meta.blockedHosts, ldHost)) {
+				if (this.utilityService.isBlockedHost(this.meta.blockedHosts, ldHost)) {
 					throw new Bull.UnrecoverableError(`Blocked request: ${ldHost}`);
 				}
 			} else {
@@ -197,7 +199,7 @@ export class InboxProcessorService {
 			this.apRequestChart.inbox();
 			this.federationChart.inbox(i.host);
 
-			if (meta.enableChartsForFederatedInstances) {
+			if (this.meta.enableChartsForFederatedInstances) {
 				this.instanceChart.requestReceived(i.host);
 			}
 		});
diff --git a/packages/backend/src/server/ServerService.ts b/packages/backend/src/server/ServerService.ts
index 2d5535df0c..fd2bd3267d 100644
--- a/packages/backend/src/server/ServerService.ts
+++ b/packages/backend/src/server/ServerService.ts
@@ -13,7 +13,7 @@ import fastifyRawBody from 'fastify-raw-body';
 import { IsNull } from 'typeorm';
 import { GlobalEventService } from '@/core/GlobalEventService.js';
 import type { Config } from '@/config.js';
-import type { EmojisRepository, UserProfilesRepository, UsersRepository } from '@/models/_.js';
+import type { EmojisRepository, MiMeta, UserProfilesRepository, UsersRepository } from '@/models/_.js';
 import { DI } from '@/di-symbols.js';
 import type Logger from '@/logger.js';
 import * as Acct from '@/misc/acct.js';
@@ -21,7 +21,6 @@ import { genIdenticon } from '@/misc/gen-identicon.js';
 import { UserEntityService } from '@/core/entities/UserEntityService.js';
 import { LoggerService } from '@/core/LoggerService.js';
 import { bindThis } from '@/decorators.js';
-import { MetaService } from '@/core/MetaService.js';
 import { ActivityPubServerService } from './ActivityPubServerService.js';
 import { NodeinfoServerService } from './NodeinfoServerService.js';
 import { ApiServerService } from './api/ApiServerService.js';
@@ -44,6 +43,9 @@ export class ServerService implements OnApplicationShutdown {
 		@Inject(DI.config)
 		private config: Config,
 
+		@Inject(DI.meta)
+		private meta: MiMeta,
+
 		@Inject(DI.usersRepository)
 		private usersRepository: UsersRepository,
 
@@ -53,7 +55,6 @@ export class ServerService implements OnApplicationShutdown {
 		@Inject(DI.emojisRepository)
 		private emojisRepository: EmojisRepository,
 
-		private metaService: MetaService,
 		private userEntityService: UserEntityService,
 		private apiServerService: ApiServerService,
 		private openApiServerService: OpenApiServerService,
@@ -193,7 +194,7 @@ export class ServerService implements OnApplicationShutdown {
 			reply.header('Content-Type', 'image/png');
 			reply.header('Cache-Control', 'public, max-age=86400');
 
-			if ((await this.metaService.fetch()).enableIdenticonGeneration) {
+			if (this.meta.enableIdenticonGeneration) {
 				return await genIdenticon(request.params.x);
 			} else {
 				return reply.redirect('/static-assets/avatar.png');
diff --git a/packages/backend/src/server/api/ApiCallService.ts b/packages/backend/src/server/api/ApiCallService.ts
index e8d56ee50a..aad833f126 100644
--- a/packages/backend/src/server/api/ApiCallService.ts
+++ b/packages/backend/src/server/api/ApiCallService.ts
@@ -13,8 +13,7 @@ import { getIpHash } from '@/misc/get-ip-hash.js';
 import type { MiLocalUser, MiUser } from '@/models/User.js';
 import type { MiAccessToken } from '@/models/AccessToken.js';
 import type Logger from '@/logger.js';
-import type { UserIpsRepository } from '@/models/_.js';
-import { MetaService } from '@/core/MetaService.js';
+import type { MiMeta, UserIpsRepository } from '@/models/_.js';
 import { createTemp } from '@/misc/create-temp.js';
 import { bindThis } from '@/decorators.js';
 import { RoleService } from '@/core/RoleService.js';
@@ -40,13 +39,15 @@ export class ApiCallService implements OnApplicationShutdown {
 	private userIpHistoriesClearIntervalId: NodeJS.Timeout;
 
 	constructor(
+		@Inject(DI.meta)
+		private meta: MiMeta,
+
 		@Inject(DI.config)
 		private config: Config,
 
 		@Inject(DI.userIpsRepository)
 		private userIpsRepository: UserIpsRepository,
 
-		private metaService: MetaService,
 		private authenticateService: AuthenticateService,
 		private rateLimiterService: RateLimiterService,
 		private roleService: RoleService,
@@ -265,9 +266,8 @@ export class ApiCallService implements OnApplicationShutdown {
 	}
 
 	@bindThis
-	private async logIp(request: FastifyRequest, user: MiLocalUser) {
-		const meta = await this.metaService.fetch();
-		if (!meta.enableIpLogging) return;
+	private logIp(request: FastifyRequest, user: MiLocalUser) {
+		if (!this.meta.enableIpLogging) return;
 		const ip = request.ip;
 		const ips = this.userIpHistories.get(user.id);
 		if (ips == null || !ips.has(ip)) {
diff --git a/packages/backend/src/server/api/SignupApiService.ts b/packages/backend/src/server/api/SignupApiService.ts
index 632b0c62bc..c499638018 100644
--- a/packages/backend/src/server/api/SignupApiService.ts
+++ b/packages/backend/src/server/api/SignupApiService.ts
@@ -7,9 +7,8 @@ import { Inject, Injectable } from '@nestjs/common';
 import bcrypt from 'bcryptjs';
 import { IsNull } from 'typeorm';
 import { DI } from '@/di-symbols.js';
-import type { RegistrationTicketsRepository, UsedUsernamesRepository, UserPendingsRepository, UserProfilesRepository, UsersRepository, MiRegistrationTicket } from '@/models/_.js';
+import type { RegistrationTicketsRepository, UsedUsernamesRepository, UserPendingsRepository, UserProfilesRepository, UsersRepository, MiRegistrationTicket, MiMeta } from '@/models/_.js';
 import type { Config } from '@/config.js';
-import { MetaService } from '@/core/MetaService.js';
 import { CaptchaService } from '@/core/CaptchaService.js';
 import { IdService } from '@/core/IdService.js';
 import { SignupService } from '@/core/SignupService.js';
@@ -28,6 +27,9 @@ export class SignupApiService {
 		@Inject(DI.config)
 		private config: Config,
 
+		@Inject(DI.meta)
+		private meta: MiMeta,
+
 		@Inject(DI.usersRepository)
 		private usersRepository: UsersRepository,
 
@@ -45,7 +47,6 @@ export class SignupApiService {
 
 		private userEntityService: UserEntityService,
 		private idService: IdService,
-		private metaService: MetaService,
 		private captchaService: CaptchaService,
 		private signupService: SignupService,
 		private signinService: SigninService,
@@ -72,31 +73,29 @@ export class SignupApiService {
 	) {
 		const body = request.body;
 
-		const instance = await this.metaService.fetch(true);
-
 		// Verify *Captcha
 		// ただしテスト時はこの機構は障害となるため無効にする
 		if (process.env.NODE_ENV !== 'test') {
-			if (instance.enableHcaptcha && instance.hcaptchaSecretKey) {
-				await this.captchaService.verifyHcaptcha(instance.hcaptchaSecretKey, body['hcaptcha-response']).catch(err => {
+			if (this.meta.enableHcaptcha && this.meta.hcaptchaSecretKey) {
+				await this.captchaService.verifyHcaptcha(this.meta.hcaptchaSecretKey, body['hcaptcha-response']).catch(err => {
 					throw new FastifyReplyError(400, err);
 				});
 			}
 
-			if (instance.enableMcaptcha && instance.mcaptchaSecretKey && instance.mcaptchaSitekey && instance.mcaptchaInstanceUrl) {
-				await this.captchaService.verifyMcaptcha(instance.mcaptchaSecretKey, instance.mcaptchaSitekey, instance.mcaptchaInstanceUrl, body['m-captcha-response']).catch(err => {
+			if (this.meta.enableMcaptcha && this.meta.mcaptchaSecretKey && this.meta.mcaptchaSitekey && this.meta.mcaptchaInstanceUrl) {
+				await this.captchaService.verifyMcaptcha(this.meta.mcaptchaSecretKey, this.meta.mcaptchaSitekey, this.meta.mcaptchaInstanceUrl, body['m-captcha-response']).catch(err => {
 					throw new FastifyReplyError(400, err);
 				});
 			}
 
-			if (instance.enableRecaptcha && instance.recaptchaSecretKey) {
-				await this.captchaService.verifyRecaptcha(instance.recaptchaSecretKey, body['g-recaptcha-response']).catch(err => {
+			if (this.meta.enableRecaptcha && this.meta.recaptchaSecretKey) {
+				await this.captchaService.verifyRecaptcha(this.meta.recaptchaSecretKey, body['g-recaptcha-response']).catch(err => {
 					throw new FastifyReplyError(400, err);
 				});
 			}
 
-			if (instance.enableTurnstile && instance.turnstileSecretKey) {
-				await this.captchaService.verifyTurnstile(instance.turnstileSecretKey, body['turnstile-response']).catch(err => {
+			if (this.meta.enableTurnstile && this.meta.turnstileSecretKey) {
+				await this.captchaService.verifyTurnstile(this.meta.turnstileSecretKey, body['turnstile-response']).catch(err => {
 					throw new FastifyReplyError(400, err);
 				});
 			}
@@ -108,7 +107,7 @@ export class SignupApiService {
 		const invitationCode = body['invitationCode'];
 		const emailAddress = body['emailAddress'];
 
-		if (instance.emailRequiredForSignup) {
+		if (this.meta.emailRequiredForSignup) {
 			if (emailAddress == null || typeof emailAddress !== 'string') {
 				reply.code(400);
 				return;
@@ -123,7 +122,7 @@ export class SignupApiService {
 
 		let ticket: MiRegistrationTicket | null = null;
 
-		if (instance.disableRegistration) {
+		if (this.meta.disableRegistration) {
 			if (invitationCode == null || typeof invitationCode !== 'string') {
 				reply.code(400);
 				return;
@@ -144,7 +143,7 @@ export class SignupApiService {
 			}
 
 			// メアド認証が有効の場合
-			if (instance.emailRequiredForSignup) {
+			if (this.meta.emailRequiredForSignup) {
 				// メアド認証済みならエラー
 				if (ticket.usedBy) {
 					reply.code(400);
@@ -162,7 +161,7 @@ export class SignupApiService {
 			}
 		}
 
-		if (instance.emailRequiredForSignup) {
+		if (this.meta.emailRequiredForSignup) {
 			if (await this.usersRepository.exists({ where: { usernameLower: username.toLowerCase(), host: IsNull() } })) {
 				throw new FastifyReplyError(400, 'DUPLICATED_USERNAME');
 			}
@@ -172,7 +171,7 @@ export class SignupApiService {
 				throw new FastifyReplyError(400, 'USED_USERNAME');
 			}
 
-			const isPreserved = instance.preservedUsernames.map(x => x.toLowerCase()).includes(username.toLowerCase());
+			const isPreserved = this.meta.preservedUsernames.map(x => x.toLowerCase()).includes(username.toLowerCase());
 			if (isPreserved) {
 				throw new FastifyReplyError(400, 'DENIED_USERNAME');
 			}
diff --git a/packages/backend/src/server/api/endpoints/ap/show.ts b/packages/backend/src/server/api/endpoints/ap/show.ts
index d3c40dba59..577ca0b24c 100644
--- a/packages/backend/src/server/api/endpoints/ap/show.ts
+++ b/packages/backend/src/server/api/endpoints/ap/show.ts
@@ -3,7 +3,7 @@
  * SPDX-License-Identifier: AGPL-3.0-only
  */
 
-import { Injectable } from '@nestjs/common';
+import { Inject, Injectable } from '@nestjs/common';
 import ms from 'ms';
 import { Endpoint } from '@/server/api/endpoint-base.js';
 import type { MiNote } from '@/models/Note.js';
@@ -12,7 +12,6 @@ import { isActor, isPost, getApId } from '@/core/activitypub/type.js';
 import type { SchemaType } from '@/misc/json-schema.js';
 import { ApResolverService } from '@/core/activitypub/ApResolverService.js';
 import { ApDbResolverService } from '@/core/activitypub/ApDbResolverService.js';
-import { MetaService } from '@/core/MetaService.js';
 import { ApPersonService } from '@/core/activitypub/models/ApPersonService.js';
 import { ApNoteService } from '@/core/activitypub/models/ApNoteService.js';
 import { UserEntityService } from '@/core/entities/UserEntityService.js';
@@ -20,6 +19,8 @@ import { NoteEntityService } from '@/core/entities/NoteEntityService.js';
 import { UtilityService } from '@/core/UtilityService.js';
 import { bindThis } from '@/decorators.js';
 import { ApiError } from '../../error.js';
+import { MiMeta } from '@/models/_.js';
+import { DI } from '@/di-symbols.js';
 
 export const meta = {
 	tags: ['federation'],
@@ -88,10 +89,12 @@ export const paramDef = {
 @Injectable()
 export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-disable-line import/no-default-export
 	constructor(
+		@Inject(DI.meta)
+		private serverSettings: MiMeta,
+
 		private utilityService: UtilityService,
 		private userEntityService: UserEntityService,
 		private noteEntityService: NoteEntityService,
-		private metaService: MetaService,
 		private apResolverService: ApResolverService,
 		private apDbResolverService: ApDbResolverService,
 		private apPersonService: ApPersonService,
@@ -112,9 +115,8 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 	 */
 	@bindThis
 	private async fetchAny(uri: string, me: MiLocalUser | null | undefined): Promise<SchemaType<typeof meta['res']> | null> {
-	// ブロックしてたら中断
-		const fetchedMeta = await this.metaService.fetch();
-		if (this.utilityService.isBlockedHost(fetchedMeta.blockedHosts, this.utilityService.extractDbHost(uri))) return null;
+		// ブロックしてたら中断
+		if (this.utilityService.isBlockedHost(this.serverSettings.blockedHosts, this.utilityService.extractDbHost(uri))) return null;
 
 		let local = await this.mergePack(me, ...await Promise.all([
 			this.apDbResolverService.getUserFromApId(uri),
diff --git a/packages/backend/src/server/api/endpoints/channels/timeline.ts b/packages/backend/src/server/api/endpoints/channels/timeline.ts
index 8c55673590..d4fd75e049 100644
--- a/packages/backend/src/server/api/endpoints/channels/timeline.ts
+++ b/packages/backend/src/server/api/endpoints/channels/timeline.ts
@@ -5,14 +5,12 @@
 
 import { Inject, Injectable } from '@nestjs/common';
 import { Endpoint } from '@/server/api/endpoint-base.js';
-import type { ChannelsRepository, NotesRepository } from '@/models/_.js';
+import type { ChannelsRepository, MiMeta, NotesRepository } from '@/models/_.js';
 import { QueryService } from '@/core/QueryService.js';
 import { NoteEntityService } from '@/core/entities/NoteEntityService.js';
 import ActiveUsersChart from '@/core/chart/charts/active-users.js';
 import { DI } from '@/di-symbols.js';
 import { IdService } from '@/core/IdService.js';
-import { CacheService } from '@/core/CacheService.js';
-import { MetaService } from '@/core/MetaService.js';
 import { FanoutTimelineEndpointService } from '@/core/FanoutTimelineEndpointService.js';
 import { MiLocalUser } from '@/models/User.js';
 import { ApiError } from '../../error.js';
@@ -58,6 +56,9 @@ export const paramDef = {
 @Injectable()
 export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-disable-line import/no-default-export
 	constructor(
+		@Inject(DI.meta)
+		private serverSettings: MiMeta,
+
 		@Inject(DI.notesRepository)
 		private notesRepository: NotesRepository,
 
@@ -68,16 +69,12 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 		private noteEntityService: NoteEntityService,
 		private queryService: QueryService,
 		private fanoutTimelineEndpointService: FanoutTimelineEndpointService,
-		private cacheService: CacheService,
 		private activeUsersChart: ActiveUsersChart,
-		private metaService: MetaService,
 	) {
 		super(meta, paramDef, async (ps, me) => {
 			const untilId = ps.untilId ?? (ps.untilDate ? this.idService.gen(ps.untilDate!) : null);
 			const sinceId = ps.sinceId ?? (ps.sinceDate ? this.idService.gen(ps.sinceDate!) : null);
 
-			const serverSettings = await this.metaService.fetch();
-
 			const channel = await this.channelsRepository.findOneBy({
 				id: ps.channelId,
 			});
@@ -88,7 +85,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 
 			if (me) this.activeUsersChart.read(me);
 
-			if (!serverSettings.enableFanoutTimeline) {
+			if (!this.serverSettings.enableFanoutTimeline) {
 				return await this.noteEntityService.packMany(await this.getFromDb({ untilId, sinceId, limit: ps.limit, channelId: channel.id }, me), me);
 			}
 
diff --git a/packages/backend/src/server/api/endpoints/drive.ts b/packages/backend/src/server/api/endpoints/drive.ts
index 7e9b0fa0e1..eb45e29f9e 100644
--- a/packages/backend/src/server/api/endpoints/drive.ts
+++ b/packages/backend/src/server/api/endpoints/drive.ts
@@ -5,7 +5,6 @@
 
 import { Injectable } from '@nestjs/common';
 import { Endpoint } from '@/server/api/endpoint-base.js';
-import { MetaService } from '@/core/MetaService.js';
 import { DriveFileEntityService } from '@/core/entities/DriveFileEntityService.js';
 import { RoleService } from '@/core/RoleService.js';
 
@@ -41,14 +40,10 @@ export const paramDef = {
 @Injectable()
 export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-disable-line import/no-default-export
 	constructor(
-		private metaService: MetaService,
 		private driveFileEntityService: DriveFileEntityService,
 		private roleService: RoleService,
 	) {
 		super(meta, paramDef, async (ps, me) => {
-			const instance = await this.metaService.fetch(true);
-
-			// Calculate drive usage
 			const usage = await this.driveFileEntityService.calcDriveUsageOf(me.id);
 
 			const policies = await this.roleService.getUserPolicies(me.id);
diff --git a/packages/backend/src/server/api/endpoints/drive/files/create.ts b/packages/backend/src/server/api/endpoints/drive/files/create.ts
index 9c17f93ab2..74eb4dded7 100644
--- a/packages/backend/src/server/api/endpoints/drive/files/create.ts
+++ b/packages/backend/src/server/api/endpoints/drive/files/create.ts
@@ -4,14 +4,15 @@
  */
 
 import ms from 'ms';
-import { Injectable } from '@nestjs/common';
+import { Inject, Injectable } from '@nestjs/common';
 import { DB_MAX_IMAGE_COMMENT_LENGTH } from '@/const.js';
 import { IdentifiableError } from '@/misc/identifiable-error.js';
 import { Endpoint } from '@/server/api/endpoint-base.js';
 import { DriveFileEntityService } from '@/core/entities/DriveFileEntityService.js';
-import { MetaService } from '@/core/MetaService.js';
 import { DriveService } from '@/core/DriveService.js';
 import { ApiError } from '../../../error.js';
+import { MiMeta } from '@/models/_.js';
+import { DI } from '@/di-symbols.js';
 
 export const meta = {
 	tags: ['drive'],
@@ -73,8 +74,10 @@ export const paramDef = {
 @Injectable()
 export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-disable-line import/no-default-export
 	constructor(
+		@Inject(DI.meta)
+		private serverSettings: MiMeta,
+
 		private driveFileEntityService: DriveFileEntityService,
-		private metaService: MetaService,
 		private driveService: DriveService,
 	) {
 		super(meta, paramDef, async (ps, me, _, file, cleanup, ip, headers) => {
@@ -91,8 +94,6 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 				}
 			}
 
-			const instance = await this.metaService.fetch();
-
 			try {
 				// Create file
 				const driveFile = await this.driveService.addFile({
@@ -103,8 +104,8 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 					folderId: ps.folderId,
 					force: ps.force,
 					sensitive: ps.isSensitive,
-					requestIp: instance.enableIpLogging ? ip : null,
-					requestHeaders: instance.enableIpLogging ? headers : null,
+					requestIp: this.serverSettings.enableIpLogging ? ip : null,
+					requestHeaders: this.serverSettings.enableIpLogging ? headers : null,
 				});
 				return await this.driveFileEntityService.pack(driveFile, { self: true });
 			} catch (err) {
diff --git a/packages/backend/src/server/api/endpoints/i/update-email.ts b/packages/backend/src/server/api/endpoints/i/update-email.ts
index eea657ebbd..da1faee30d 100644
--- a/packages/backend/src/server/api/endpoints/i/update-email.ts
+++ b/packages/backend/src/server/api/endpoints/i/update-email.ts
@@ -7,7 +7,7 @@ import { Inject, Injectable } from '@nestjs/common';
 import ms from 'ms';
 import bcrypt from 'bcryptjs';
 import { Endpoint } from '@/server/api/endpoint-base.js';
-import type { UserProfilesRepository } from '@/models/_.js';
+import type { MiMeta, UserProfilesRepository } from '@/models/_.js';
 import { UserEntityService } from '@/core/entities/UserEntityService.js';
 import { EmailService } from '@/core/EmailService.js';
 import type { Config } from '@/config.js';
@@ -15,7 +15,6 @@ import { DI } from '@/di-symbols.js';
 import { GlobalEventService } from '@/core/GlobalEventService.js';
 import { L_CHARS, secureRndstr } from '@/misc/secure-rndstr.js';
 import { UserAuthService } from '@/core/UserAuthService.js';
-import { MetaService } from '@/core/MetaService.js';
 import { ApiError } from '../../error.js';
 
 export const meta = {
@@ -70,10 +69,12 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 		@Inject(DI.config)
 		private config: Config,
 
+		@Inject(DI.meta)
+		private serverSettings: MiMeta,
+
 		@Inject(DI.userProfilesRepository)
 		private userProfilesRepository: UserProfilesRepository,
 
-		private metaService: MetaService,
 		private userEntityService: UserEntityService,
 		private emailService: EmailService,
 		private userAuthService: UserAuthService,
@@ -105,7 +106,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 				if (!res.available) {
 					throw new ApiError(meta.errors.unavailable);
 				}
-			} else if ((await this.metaService.fetch()).emailRequiredForSignup) {
+			} else if (this.serverSettings.emailRequiredForSignup) {
 				throw new ApiError(meta.errors.emailRequired);
 			}
 
diff --git a/packages/backend/src/server/api/endpoints/notes/create.ts b/packages/backend/src/server/api/endpoints/notes/create.ts
index beb77ca7ab..253a360815 100644
--- a/packages/backend/src/server/api/endpoints/notes/create.ts
+++ b/packages/backend/src/server/api/endpoints/notes/create.ts
@@ -17,8 +17,6 @@ import { NoteEntityService } from '@/core/entities/NoteEntityService.js';
 import { NoteCreateService } from '@/core/NoteCreateService.js';
 import { DI } from '@/di-symbols.js';
 import { isQuote, isRenote } from '@/misc/is-renote.js';
-import { MetaService } from '@/core/MetaService.js';
-import { UtilityService } from '@/core/UtilityService.js';
 import { IdentifiableError } from '@/misc/identifiable-error.js';
 import { ApiError } from '../../error.js';
 
diff --git a/packages/backend/src/server/api/endpoints/notes/hybrid-timeline.ts b/packages/backend/src/server/api/endpoints/notes/hybrid-timeline.ts
index 2a2c659942..aed9065bf9 100644
--- a/packages/backend/src/server/api/endpoints/notes/hybrid-timeline.ts
+++ b/packages/backend/src/server/api/endpoints/notes/hybrid-timeline.ts
@@ -5,7 +5,7 @@
 
 import { Brackets } from 'typeorm';
 import { Inject, Injectable } from '@nestjs/common';
-import type { NotesRepository, ChannelFollowingsRepository } from '@/models/_.js';
+import type { NotesRepository, ChannelFollowingsRepository, MiMeta } from '@/models/_.js';
 import { Endpoint } from '@/server/api/endpoint-base.js';
 import ActiveUsersChart from '@/core/chart/charts/active-users.js';
 import { NoteEntityService } from '@/core/entities/NoteEntityService.js';
@@ -16,7 +16,6 @@ import { CacheService } from '@/core/CacheService.js';
 import { FanoutTimelineName } from '@/core/FanoutTimelineService.js';
 import { QueryService } from '@/core/QueryService.js';
 import { UserFollowingService } from '@/core/UserFollowingService.js';
-import { MetaService } from '@/core/MetaService.js';
 import { MiLocalUser } from '@/models/User.js';
 import { FanoutTimelineEndpointService } from '@/core/FanoutTimelineEndpointService.js';
 import { ApiError } from '../../error.js';
@@ -74,6 +73,9 @@ export const paramDef = {
 @Injectable()
 export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-disable-line import/no-default-export
 	constructor(
+		@Inject(DI.meta)
+		private serverSettings: MiMeta,
+
 		@Inject(DI.notesRepository)
 		private notesRepository: NotesRepository,
 
@@ -87,7 +89,6 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 		private cacheService: CacheService,
 		private queryService: QueryService,
 		private userFollowingService: UserFollowingService,
-		private metaService: MetaService,
 		private fanoutTimelineEndpointService: FanoutTimelineEndpointService,
 	) {
 		super(meta, paramDef, async (ps, me) => {
@@ -101,9 +102,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 
 			if (ps.withReplies && ps.withFiles) throw new ApiError(meta.errors.bothWithRepliesAndWithFiles);
 
-			const serverSettings = await this.metaService.fetch();
-
-			if (!serverSettings.enableFanoutTimeline) {
+			if (!this.serverSettings.enableFanoutTimeline) {
 				const timeline = await this.getFromDb({
 					untilId,
 					sinceId,
@@ -156,7 +155,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 				allowPartial: ps.allowPartial,
 				me,
 				redisTimelines: timelineConfig,
-				useDbFallback: serverSettings.enableFanoutTimelineDbFallback,
+				useDbFallback: this.serverSettings.enableFanoutTimelineDbFallback,
 				alwaysIncludeMyNotes: true,
 				excludePureRenotes: !ps.withRenotes,
 				noteFilter: note => {
diff --git a/packages/backend/src/server/api/endpoints/notes/local-timeline.ts b/packages/backend/src/server/api/endpoints/notes/local-timeline.ts
index be82b5a8a7..0b48f2c78b 100644
--- a/packages/backend/src/server/api/endpoints/notes/local-timeline.ts
+++ b/packages/backend/src/server/api/endpoints/notes/local-timeline.ts
@@ -5,16 +5,14 @@
 
 import { Brackets } from 'typeorm';
 import { Inject, Injectable } from '@nestjs/common';
-import type { NotesRepository } from '@/models/_.js';
+import type { MiMeta, NotesRepository } from '@/models/_.js';
 import { Endpoint } from '@/server/api/endpoint-base.js';
 import { NoteEntityService } from '@/core/entities/NoteEntityService.js';
 import ActiveUsersChart from '@/core/chart/charts/active-users.js';
 import { DI } from '@/di-symbols.js';
 import { RoleService } from '@/core/RoleService.js';
 import { IdService } from '@/core/IdService.js';
-import { CacheService } from '@/core/CacheService.js';
 import { QueryService } from '@/core/QueryService.js';
-import { MetaService } from '@/core/MetaService.js';
 import { MiLocalUser } from '@/models/User.js';
 import { FanoutTimelineEndpointService } from '@/core/FanoutTimelineEndpointService.js';
 import { ApiError } from '../../error.js';
@@ -66,6 +64,9 @@ export const paramDef = {
 @Injectable()
 export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-disable-line import/no-default-export
 	constructor(
+		@Inject(DI.meta)
+		private serverSettings: MiMeta,
+
 		@Inject(DI.notesRepository)
 		private notesRepository: NotesRepository,
 
@@ -73,10 +74,8 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 		private roleService: RoleService,
 		private activeUsersChart: ActiveUsersChart,
 		private idService: IdService,
-		private cacheService: CacheService,
 		private fanoutTimelineEndpointService: FanoutTimelineEndpointService,
 		private queryService: QueryService,
-		private metaService: MetaService,
 	) {
 		super(meta, paramDef, async (ps, me) => {
 			const untilId = ps.untilId ?? (ps.untilDate ? this.idService.gen(ps.untilDate!) : null);
@@ -89,9 +88,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 
 			if (ps.withReplies && ps.withFiles) throw new ApiError(meta.errors.bothWithRepliesAndWithFiles);
 
-			const serverSettings = await this.metaService.fetch();
-
-			if (!serverSettings.enableFanoutTimeline) {
+			if (!this.serverSettings.enableFanoutTimeline) {
 				const timeline = await this.getFromDb({
 					untilId,
 					sinceId,
@@ -115,7 +112,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 				limit: ps.limit,
 				allowPartial: ps.allowPartial,
 				me,
-				useDbFallback: serverSettings.enableFanoutTimelineDbFallback,
+				useDbFallback: this.serverSettings.enableFanoutTimelineDbFallback,
 				redisTimelines:
 					ps.withFiles ? ['localTimelineWithFiles']
 					: ps.withReplies ? ['localTimeline', 'localTimelineWithReplies']
diff --git a/packages/backend/src/server/api/endpoints/notes/timeline.ts b/packages/backend/src/server/api/endpoints/notes/timeline.ts
index c9b43b5359..7cb11cc1eb 100644
--- a/packages/backend/src/server/api/endpoints/notes/timeline.ts
+++ b/packages/backend/src/server/api/endpoints/notes/timeline.ts
@@ -5,7 +5,7 @@
 
 import { Brackets } from 'typeorm';
 import { Inject, Injectable } from '@nestjs/common';
-import type { NotesRepository, ChannelFollowingsRepository } from '@/models/_.js';
+import type { NotesRepository, ChannelFollowingsRepository, MiMeta } from '@/models/_.js';
 import { Endpoint } from '@/server/api/endpoint-base.js';
 import { QueryService } from '@/core/QueryService.js';
 import ActiveUsersChart from '@/core/chart/charts/active-users.js';
@@ -15,7 +15,6 @@ import { IdService } from '@/core/IdService.js';
 import { CacheService } from '@/core/CacheService.js';
 import { UserFollowingService } from '@/core/UserFollowingService.js';
 import { MiLocalUser } from '@/models/User.js';
-import { MetaService } from '@/core/MetaService.js';
 import { FanoutTimelineEndpointService } from '@/core/FanoutTimelineEndpointService.js';
 
 export const meta = {
@@ -56,6 +55,9 @@ export const paramDef = {
 @Injectable()
 export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-disable-line import/no-default-export
 	constructor(
+		@Inject(DI.meta)
+		private serverSettings: MiMeta,
+
 		@Inject(DI.notesRepository)
 		private notesRepository: NotesRepository,
 
@@ -69,15 +71,12 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 		private fanoutTimelineEndpointService: FanoutTimelineEndpointService,
 		private userFollowingService: UserFollowingService,
 		private queryService: QueryService,
-		private metaService: MetaService,
 	) {
 		super(meta, paramDef, async (ps, me) => {
 			const untilId = ps.untilId ?? (ps.untilDate ? this.idService.gen(ps.untilDate!) : null);
 			const sinceId = ps.sinceId ?? (ps.sinceDate ? this.idService.gen(ps.sinceDate!) : null);
 
-			const serverSettings = await this.metaService.fetch();
-
-			if (!serverSettings.enableFanoutTimeline) {
+			if (!this.serverSettings.enableFanoutTimeline) {
 				const timeline = await this.getFromDb({
 					untilId,
 					sinceId,
@@ -108,7 +107,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 				limit: ps.limit,
 				allowPartial: ps.allowPartial,
 				me,
-				useDbFallback: serverSettings.enableFanoutTimelineDbFallback,
+				useDbFallback: this.serverSettings.enableFanoutTimelineDbFallback,
 				redisTimelines: ps.withFiles ? [`homeTimelineWithFiles:${me.id}`] : [`homeTimeline:${me.id}`],
 				alwaysIncludeMyNotes: true,
 				excludePureRenotes: !ps.withRenotes,
diff --git a/packages/backend/src/server/api/endpoints/notes/translate.ts b/packages/backend/src/server/api/endpoints/notes/translate.ts
index 38a9660aa2..e9a6a36b02 100644
--- a/packages/backend/src/server/api/endpoints/notes/translate.ts
+++ b/packages/backend/src/server/api/endpoints/notes/translate.ts
@@ -4,14 +4,15 @@
  */
 
 import { URLSearchParams } from 'node:url';
-import { Injectable } from '@nestjs/common';
+import { Inject, Injectable } from '@nestjs/common';
 import { Endpoint } from '@/server/api/endpoint-base.js';
 import { NoteEntityService } from '@/core/entities/NoteEntityService.js';
-import { MetaService } from '@/core/MetaService.js';
 import { HttpRequestService } from '@/core/HttpRequestService.js';
 import { GetterService } from '@/server/api/GetterService.js';
 import { RoleService } from '@/core/RoleService.js';
 import { ApiError } from '../../error.js';
+import { MiMeta } from '@/models/_.js';
+import { DI } from '@/di-symbols.js';
 
 export const meta = {
 	tags: ['notes'],
@@ -59,9 +60,11 @@ export const paramDef = {
 @Injectable()
 export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-disable-line import/no-default-export
 	constructor(
+		@Inject(DI.meta)
+		private serverSettings: MiMeta,
+
 		private noteEntityService: NoteEntityService,
 		private getterService: GetterService,
-		private metaService: MetaService,
 		private httpRequestService: HttpRequestService,
 		private roleService: RoleService,
 	) {
@@ -84,9 +87,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 				return;
 			}
 
-			const instance = await this.metaService.fetch();
-
-			if (instance.deeplAuthKey == null) {
+			if (this.serverSettings.deeplAuthKey == null) {
 				throw new ApiError(meta.errors.unavailable);
 			}
 
@@ -94,11 +95,11 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 			if (targetLang.includes('-')) targetLang = targetLang.split('-')[0];
 
 			const params = new URLSearchParams();
-			params.append('auth_key', instance.deeplAuthKey);
+			params.append('auth_key', this.serverSettings.deeplAuthKey);
 			params.append('text', note.text);
 			params.append('target_lang', targetLang);
 
-			const endpoint = instance.deeplIsPro ? 'https://api.deepl.com/v2/translate' : 'https://api-free.deepl.com/v2/translate';
+			const endpoint = this.serverSettings.deeplIsPro ? 'https://api.deepl.com/v2/translate' : 'https://api-free.deepl.com/v2/translate';
 
 			const res = await this.httpRequestService.send(endpoint, {
 				method: 'POST',
diff --git a/packages/backend/src/server/api/endpoints/notes/user-list-timeline.ts b/packages/backend/src/server/api/endpoints/notes/user-list-timeline.ts
index 43877e61ef..6c7185c9eb 100644
--- a/packages/backend/src/server/api/endpoints/notes/user-list-timeline.ts
+++ b/packages/backend/src/server/api/endpoints/notes/user-list-timeline.ts
@@ -5,16 +5,14 @@
 
 import { Inject, Injectable } from '@nestjs/common';
 import { Brackets } from 'typeorm';
-import type { MiUserList, NotesRepository, UserListMembershipsRepository, UserListsRepository } from '@/models/_.js';
+import type { MiMeta, MiUserList, NotesRepository, UserListMembershipsRepository, UserListsRepository } from '@/models/_.js';
 import { Endpoint } from '@/server/api/endpoint-base.js';
 import { NoteEntityService } from '@/core/entities/NoteEntityService.js';
 import ActiveUsersChart from '@/core/chart/charts/active-users.js';
 import { DI } from '@/di-symbols.js';
-import { CacheService } from '@/core/CacheService.js';
 import { IdService } from '@/core/IdService.js';
 import { QueryService } from '@/core/QueryService.js';
 import { MiLocalUser } from '@/models/User.js';
-import { MetaService } from '@/core/MetaService.js';
 import { FanoutTimelineEndpointService } from '@/core/FanoutTimelineEndpointService.js';
 import { ApiError } from '../../error.js';
 
@@ -69,6 +67,9 @@ export const paramDef = {
 @Injectable()
 export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-disable-line import/no-default-export
 	constructor(
+		@Inject(DI.meta)
+		private serverSettings: MiMeta,
+
 		@Inject(DI.notesRepository)
 		private notesRepository: NotesRepository,
 
@@ -80,11 +81,9 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 
 		private noteEntityService: NoteEntityService,
 		private activeUsersChart: ActiveUsersChart,
-		private cacheService: CacheService,
 		private idService: IdService,
 		private fanoutTimelineEndpointService: FanoutTimelineEndpointService,
 		private queryService: QueryService,
-		private metaService: MetaService,
 	) {
 		super(meta, paramDef, async (ps, me) => {
 			const untilId = ps.untilId ?? (ps.untilDate ? this.idService.gen(ps.untilDate!) : null);
@@ -99,9 +98,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 				throw new ApiError(meta.errors.noSuchList);
 			}
 
-			const serverSettings = await this.metaService.fetch();
-
-			if (!serverSettings.enableFanoutTimeline) {
+			if (!this.serverSettings.enableFanoutTimeline) {
 				const timeline = await this.getFromDb(list, {
 					untilId,
 					sinceId,
@@ -124,7 +121,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 				limit: ps.limit,
 				allowPartial: ps.allowPartial,
 				me,
-				useDbFallback: serverSettings.enableFanoutTimelineDbFallback,
+				useDbFallback: this.serverSettings.enableFanoutTimelineDbFallback,
 				redisTimelines: ps.withFiles ? [`userListTimelineWithFiles:${list.id}`] : [`userListTimeline:${list.id}`],
 				alwaysIncludeMyNotes: true,
 				excludePureRenotes: !ps.withRenotes,
diff --git a/packages/backend/src/server/api/endpoints/pinned-users.ts b/packages/backend/src/server/api/endpoints/pinned-users.ts
index 15832ef7f8..5b0b656c63 100644
--- a/packages/backend/src/server/api/endpoints/pinned-users.ts
+++ b/packages/backend/src/server/api/endpoints/pinned-users.ts
@@ -5,11 +5,10 @@
 
 import { IsNull } from 'typeorm';
 import { Inject, Injectable } from '@nestjs/common';
-import type { UsersRepository } from '@/models/_.js';
+import type { MiMeta, UsersRepository } from '@/models/_.js';
 import * as Acct from '@/misc/acct.js';
 import type { MiUser } from '@/models/User.js';
 import { Endpoint } from '@/server/api/endpoint-base.js';
-import { MetaService } from '@/core/MetaService.js';
 import { UserEntityService } from '@/core/entities/UserEntityService.js';
 import { DI } from '@/di-symbols.js';
 
@@ -38,16 +37,16 @@ export const paramDef = {
 @Injectable()
 export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-disable-line import/no-default-export
 	constructor(
+		@Inject(DI.meta)
+		private serverSettings: MiMeta,
+
 		@Inject(DI.usersRepository)
 		private usersRepository: UsersRepository,
 
-		private metaService: MetaService,
 		private userEntityService: UserEntityService,
 	) {
 		super(meta, paramDef, async (ps, me) => {
-			const meta = await this.metaService.fetch();
-
-			const users = await Promise.all(meta.pinnedUsers.map(acct => Acct.parse(acct)).map(acct => this.usersRepository.findOneBy({
+			const users = await Promise.all(this.serverSettings.pinnedUsers.map(acct => Acct.parse(acct)).map(acct => this.usersRepository.findOneBy({
 				usernameLower: acct.username.toLowerCase(),
 				host: acct.host ?? IsNull(),
 			})));
diff --git a/packages/backend/src/server/api/endpoints/server-info.ts b/packages/backend/src/server/api/endpoints/server-info.ts
index c13802eb06..8301c85f2e 100644
--- a/packages/backend/src/server/api/endpoints/server-info.ts
+++ b/packages/backend/src/server/api/endpoints/server-info.ts
@@ -5,9 +5,10 @@
 
 import * as os from 'node:os';
 import si from 'systeminformation';
-import { Injectable } from '@nestjs/common';
+import { Inject, Injectable } from '@nestjs/common';
 import { Endpoint } from '@/server/api/endpoint-base.js';
-import { MetaService } from '@/core/MetaService.js';
+import { MiMeta } from '@/models/_.js';
+import { DI } from '@/di-symbols.js';
 
 export const meta = {
 	requireCredential: false,
@@ -73,10 +74,11 @@ export const paramDef = {
 @Injectable()
 export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-disable-line import/no-default-export
 	constructor(
-		private metaService: MetaService,
+		@Inject(DI.meta)
+		private serverSettings: MiMeta,
 	) {
 		super(meta, paramDef, async () => {
-			if (!(await this.metaService.fetch()).enableServerMachineStats) return {
+			if (!this.serverSettings.enableServerMachineStats) return {
 				machine: '?',
 				cpu: {
 					model: '?',
diff --git a/packages/backend/src/server/api/endpoints/sw/register.ts b/packages/backend/src/server/api/endpoints/sw/register.ts
index a9a33149f9..fd76df2d3c 100644
--- a/packages/backend/src/server/api/endpoints/sw/register.ts
+++ b/packages/backend/src/server/api/endpoints/sw/register.ts
@@ -5,9 +5,8 @@
 
 import { Inject, Injectable } from '@nestjs/common';
 import { IdService } from '@/core/IdService.js';
-import type { SwSubscriptionsRepository } from '@/models/_.js';
+import type { MiMeta, SwSubscriptionsRepository } from '@/models/_.js';
 import { Endpoint } from '@/server/api/endpoint-base.js';
-import { MetaService } from '@/core/MetaService.js';
 import { DI } from '@/di-symbols.js';
 import { PushNotificationService } from '@/core/PushNotificationService.js';
 
@@ -62,11 +61,13 @@ export const paramDef = {
 @Injectable()
 export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-disable-line import/no-default-export
 	constructor(
+		@Inject(DI.meta)
+		private serverSettings: MiMeta,
+
 		@Inject(DI.swSubscriptionsRepository)
 		private swSubscriptionsRepository: SwSubscriptionsRepository,
 
 		private idService: IdService,
-		private metaService: MetaService,
 		private pushNotificationService: PushNotificationService,
 	) {
 		super(meta, paramDef, async (ps, me) => {
@@ -78,12 +79,10 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 				publickey: ps.publickey,
 			});
 
-			const instance = await this.metaService.fetch(true);
-
 			if (exist != null) {
 				return {
 					state: 'already-subscribed' as const,
-					key: instance.swPublicKey,
+					key: this.serverSettings.swPublicKey,
 					userId: me.id,
 					endpoint: exist.endpoint,
 					sendReadMessage: exist.sendReadMessage,
@@ -103,7 +102,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 
 			return {
 				state: 'subscribed' as const,
-				key: instance.swPublicKey,
+				key: this.serverSettings.swPublicKey,
 				userId: me.id,
 				endpoint: ps.endpoint,
 				sendReadMessage: ps.sendReadMessage,
diff --git a/packages/backend/src/server/api/endpoints/username/available.ts b/packages/backend/src/server/api/endpoints/username/available.ts
index affb0996f1..4944be9b05 100644
--- a/packages/backend/src/server/api/endpoints/username/available.ts
+++ b/packages/backend/src/server/api/endpoints/username/available.ts
@@ -5,11 +5,10 @@
 
 import { IsNull } from 'typeorm';
 import { Inject, Injectable } from '@nestjs/common';
-import type { UsedUsernamesRepository, UsersRepository } from '@/models/_.js';
+import type { MiMeta, UsedUsernamesRepository, UsersRepository } from '@/models/_.js';
 import { Endpoint } from '@/server/api/endpoint-base.js';
 import { localUsernameSchema } from '@/models/User.js';
 import { DI } from '@/di-symbols.js';
-import { MetaService } from '@/core/MetaService.js';
 
 export const meta = {
 	tags: ['users'],
@@ -39,13 +38,14 @@ export const paramDef = {
 @Injectable()
 export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-disable-line import/no-default-export
 	constructor(
+		@Inject(DI.meta)
+		private serverSettings: MiMeta,
+
 		@Inject(DI.usersRepository)
 		private usersRepository: UsersRepository,
 
 		@Inject(DI.usedUsernamesRepository)
 		private usedUsernamesRepository: UsedUsernamesRepository,
-
-		private metaService: MetaService,
 	) {
 		super(meta, paramDef, async (ps, me) => {
 			const exist = await this.usersRepository.countBy({
@@ -55,8 +55,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 
 			const exist2 = await this.usedUsernamesRepository.countBy({ username: ps.username.toLowerCase() });
 
-			const meta = await this.metaService.fetch();
-			const isPreserved = meta.preservedUsernames.map(x => x.toLowerCase()).includes(ps.username.toLowerCase());
+			const isPreserved = this.serverSettings.preservedUsernames.map(x => x.toLowerCase()).includes(ps.username.toLowerCase());
 
 			return {
 				available: exist === 0 && exist2 === 0 && !isPreserved,
diff --git a/packages/backend/src/server/api/endpoints/users/notes.ts b/packages/backend/src/server/api/endpoints/users/notes.ts
index cc76c12f1d..7fc11ba369 100644
--- a/packages/backend/src/server/api/endpoints/users/notes.ts
+++ b/packages/backend/src/server/api/endpoints/users/notes.ts
@@ -5,14 +5,13 @@
 
 import { Brackets } from 'typeorm';
 import { Inject, Injectable } from '@nestjs/common';
-import type { NotesRepository } from '@/models/_.js';
+import type { MiMeta, NotesRepository } from '@/models/_.js';
 import { Endpoint } from '@/server/api/endpoint-base.js';
 import { NoteEntityService } from '@/core/entities/NoteEntityService.js';
 import { DI } from '@/di-symbols.js';
 import { CacheService } from '@/core/CacheService.js';
 import { IdService } from '@/core/IdService.js';
 import { QueryService } from '@/core/QueryService.js';
-import { MetaService } from '@/core/MetaService.js';
 import { MiLocalUser } from '@/models/User.js';
 import { FanoutTimelineEndpointService } from '@/core/FanoutTimelineEndpointService.js';
 import { FanoutTimelineName } from '@/core/FanoutTimelineService.js';
@@ -67,6 +66,9 @@ export const paramDef = {
 @Injectable()
 export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-disable-line import/no-default-export
 	constructor(
+		@Inject(DI.meta)
+		private serverSettings: MiMeta,
+
 		@Inject(DI.notesRepository)
 		private notesRepository: NotesRepository,
 
@@ -75,15 +77,12 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 		private cacheService: CacheService,
 		private idService: IdService,
 		private fanoutTimelineEndpointService: FanoutTimelineEndpointService,
-		private metaService: MetaService,
 	) {
 		super(meta, paramDef, async (ps, me) => {
 			const untilId = ps.untilId ?? (ps.untilDate ? this.idService.gen(ps.untilDate!) : null);
 			const sinceId = ps.sinceId ?? (ps.sinceDate ? this.idService.gen(ps.sinceDate!) : null);
 			const isSelf = me && (me.id === ps.userId);
 
-			const serverSettings = await this.metaService.fetch();
-
 			if (ps.withReplies && ps.withFiles) throw new ApiError(meta.errors.bothWithRepliesAndWithFiles);
 
 			// early return if me is blocked by requesting user
@@ -94,7 +93,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 				}
 			}
 
-			if (!serverSettings.enableFanoutTimeline) {
+			if (!this.serverSettings.enableFanoutTimeline) {
 				const timeline = await this.getFromDb({
 					untilId,
 					sinceId,
diff --git a/packages/backend/src/server/web/ClientServerService.ts b/packages/backend/src/server/web/ClientServerService.ts
index 1dc53a9a70..063141273a 100644
--- a/packages/backend/src/server/web/ClientServerService.ts
+++ b/packages/backend/src/server/web/ClientServerService.ts
@@ -24,7 +24,6 @@ import type { Config } from '@/config.js';
 import { getNoteSummary } from '@/misc/get-note-summary.js';
 import { DI } from '@/di-symbols.js';
 import * as Acct from '@/misc/acct.js';
-import { MetaService } from '@/core/MetaService.js';
 import type {
 	DbQueue,
 	DeliverQueue,
@@ -73,6 +72,9 @@ export class ClientServerService {
 		@Inject(DI.config)
 		private config: Config,
 
+		@Inject(DI.meta)
+		private meta: MiMeta,
+
 		@Inject(DI.usersRepository)
 		private usersRepository: UsersRepository,
 
@@ -109,7 +111,6 @@ export class ClientServerService {
 		private clipEntityService: ClipEntityService,
 		private channelEntityService: ChannelEntityService,
 		private reversiGameEntityService: ReversiGameEntityService,
-		private metaService: MetaService,
 		private urlPreviewService: UrlPreviewService,
 		private feedService: FeedService,
 		private roleService: RoleService,
@@ -129,32 +130,30 @@ export class ClientServerService {
 
 	@bindThis
 	private async manifestHandler(reply: FastifyReply) {
-		const instance = await this.metaService.fetch(true);
-
 		let manifest = {
 			// 空文字列の場合右辺を使いたいため
 			// eslint-disable-next-line @typescript-eslint/prefer-nullish-coalescing
-			'short_name': instance.shortName || instance.name || this.config.host,
+			'short_name': this.meta.shortName || this.meta.name || this.config.host,
 			// 空文字列の場合右辺を使いたいため
 			// eslint-disable-next-line @typescript-eslint/prefer-nullish-coalescing
-			'name': instance.name || this.config.host,
+			'name': this.meta.name || this.config.host,
 			'start_url': '/',
 			'display': 'standalone',
 			'background_color': '#313a42',
 			// 空文字列の場合右辺を使いたいため
 			// eslint-disable-next-line @typescript-eslint/prefer-nullish-coalescing
-			'theme_color': instance.themeColor || '#86b300',
+			'theme_color': this.meta.themeColor || '#86b300',
 			'icons': [{
 				// 空文字列の場合右辺を使いたいため
 				// eslint-disable-next-line @typescript-eslint/prefer-nullish-coalescing
-				'src': instance.app192IconUrl || '/static-assets/icons/192.png',
+				'src': this.meta.app192IconUrl || '/static-assets/icons/192.png',
 				'sizes': '192x192',
 				'type': 'image/png',
 				'purpose': 'maskable',
 			}, {
 				// 空文字列の場合右辺を使いたいため
 				// eslint-disable-next-line @typescript-eslint/prefer-nullish-coalescing
-				'src': instance.app512IconUrl || '/static-assets/icons/512.png',
+				'src': this.meta.app512IconUrl || '/static-assets/icons/512.png',
 				'sizes': '512x512',
 				'type': 'image/png',
 				'purpose': 'maskable',
@@ -178,7 +177,7 @@ export class ClientServerService {
 
 		manifest = {
 			...manifest,
-			...JSON.parse(instance.manifestJsonOverride === '' ? '{}' : instance.manifestJsonOverride),
+			...JSON.parse(this.meta.manifestJsonOverride === '' ? '{}' : this.meta.manifestJsonOverride),
 		};
 
 		reply.header('Cache-Control', 'max-age=300');
@@ -453,9 +452,7 @@ export class ClientServerService {
 
 		// OpenSearch XML
 		fastify.get('/opensearch.xml', async (request, reply) => {
-			const meta = await this.metaService.fetch();
-
-			const name = meta.name ?? 'Misskey';
+			const name = this.meta.name ?? 'Misskey';
 			let content = '';
 			content += '<OpenSearchDescription xmlns="http://a9.com/-/spec/opensearch/1.1/" xmlns:moz="http://www.mozilla.org/2006/browser/search/">';
 			content += `<ShortName>${name}</ShortName>`;
@@ -472,14 +469,13 @@ export class ClientServerService {
 		//#endregion
 
 		const renderBase = async (reply: FastifyReply, data: { [key: string]: any } = {}) => {
-			const meta = await this.metaService.fetch();
 			reply.header('Cache-Control', 'public, max-age=30');
 			return await reply.view('base', {
-				img: meta.bannerUrl,
+				img: this.meta.bannerUrl,
 				url: this.config.url,
-				title: meta.name ?? 'Misskey',
-				desc: meta.description,
-				...await this.generateCommonPugData(meta),
+				title: this.meta.name ?? 'Misskey',
+				desc: this.meta.description,
+				...await this.generateCommonPugData(this.meta),
 				...data,
 			});
 		};
@@ -557,7 +553,6 @@ export class ClientServerService {
 
 			if (user != null) {
 				const profile = await this.userProfilesRepository.findOneByOrFail({ userId: user.id });
-				const meta = await this.metaService.fetch();
 				const me = profile.fields
 					? profile.fields
 						.filter(filed => filed.value != null && filed.value.match(/^https?:/))
@@ -573,7 +568,7 @@ export class ClientServerService {
 					user, profile, me,
 					avatarUrl: user.avatarUrl ?? this.userEntityService.getIdenticonUrl(user),
 					sub: request.params.sub,
-					...await this.generateCommonPugData(meta),
+					...await this.generateCommonPugData(this.meta),
 				});
 			} else {
 				// リモートユーザーなので
@@ -611,7 +606,6 @@ export class ClientServerService {
 			if (note) {
 				const _note = await this.noteEntityService.pack(note);
 				const profile = await this.userProfilesRepository.findOneByOrFail({ userId: note.userId });
-				const meta = await this.metaService.fetch();
 				reply.header('Cache-Control', 'public, max-age=15');
 				if (profile.preventAiLearning) {
 					reply.header('X-Robots-Tag', 'noimageai');
@@ -623,7 +617,7 @@ export class ClientServerService {
 					avatarUrl: _note.user.avatarUrl,
 					// TODO: Let locale changeable by instance setting
 					summary: getNoteSummary(_note),
-					...await this.generateCommonPugData(meta),
+					...await this.generateCommonPugData(this.meta),
 				});
 			} else {
 				return await renderBase(reply);
@@ -648,7 +642,6 @@ export class ClientServerService {
 			if (page) {
 				const _page = await this.pageEntityService.pack(page);
 				const profile = await this.userProfilesRepository.findOneByOrFail({ userId: page.userId });
-				const meta = await this.metaService.fetch();
 				if (['public'].includes(page.visibility)) {
 					reply.header('Cache-Control', 'public, max-age=15');
 				} else {
@@ -662,7 +655,7 @@ export class ClientServerService {
 					page: _page,
 					profile,
 					avatarUrl: _page.user.avatarUrl,
-					...await this.generateCommonPugData(meta),
+					...await this.generateCommonPugData(this.meta),
 				});
 			} else {
 				return await renderBase(reply);
@@ -678,7 +671,6 @@ export class ClientServerService {
 			if (flash) {
 				const _flash = await this.flashEntityService.pack(flash);
 				const profile = await this.userProfilesRepository.findOneByOrFail({ userId: flash.userId });
-				const meta = await this.metaService.fetch();
 				reply.header('Cache-Control', 'public, max-age=15');
 				if (profile.preventAiLearning) {
 					reply.header('X-Robots-Tag', 'noimageai');
@@ -688,7 +680,7 @@ export class ClientServerService {
 					flash: _flash,
 					profile,
 					avatarUrl: _flash.user.avatarUrl,
-					...await this.generateCommonPugData(meta),
+					...await this.generateCommonPugData(this.meta),
 				});
 			} else {
 				return await renderBase(reply);
@@ -704,7 +696,6 @@ export class ClientServerService {
 			if (clip && clip.isPublic) {
 				const _clip = await this.clipEntityService.pack(clip);
 				const profile = await this.userProfilesRepository.findOneByOrFail({ userId: clip.userId });
-				const meta = await this.metaService.fetch();
 				reply.header('Cache-Control', 'public, max-age=15');
 				if (profile.preventAiLearning) {
 					reply.header('X-Robots-Tag', 'noimageai');
@@ -714,7 +705,7 @@ export class ClientServerService {
 					clip: _clip,
 					profile,
 					avatarUrl: _clip.user.avatarUrl,
-					...await this.generateCommonPugData(meta),
+					...await this.generateCommonPugData(this.meta),
 				});
 			} else {
 				return await renderBase(reply);
@@ -728,7 +719,6 @@ export class ClientServerService {
 			if (post) {
 				const _post = await this.galleryPostEntityService.pack(post);
 				const profile = await this.userProfilesRepository.findOneByOrFail({ userId: post.userId });
-				const meta = await this.metaService.fetch();
 				reply.header('Cache-Control', 'public, max-age=15');
 				if (profile.preventAiLearning) {
 					reply.header('X-Robots-Tag', 'noimageai');
@@ -738,7 +728,7 @@ export class ClientServerService {
 					post: _post,
 					profile,
 					avatarUrl: _post.user.avatarUrl,
-					...await this.generateCommonPugData(meta),
+					...await this.generateCommonPugData(this.meta),
 				});
 			} else {
 				return await renderBase(reply);
@@ -753,11 +743,10 @@ export class ClientServerService {
 
 			if (channel) {
 				const _channel = await this.channelEntityService.pack(channel);
-				const meta = await this.metaService.fetch();
 				reply.header('Cache-Control', 'public, max-age=15');
 				return await reply.view('channel', {
 					channel: _channel,
-					...await this.generateCommonPugData(meta),
+					...await this.generateCommonPugData(this.meta),
 				});
 			} else {
 				return await renderBase(reply);
@@ -772,11 +761,10 @@ export class ClientServerService {
 
 			if (game) {
 				const _game = await this.reversiGameEntityService.packDetail(game);
-				const meta = await this.metaService.fetch();
 				reply.header('Cache-Control', 'public, max-age=3600');
 				return await reply.view('reversi-game', {
 					game: _game,
-					...await this.generateCommonPugData(meta),
+					...await this.generateCommonPugData(this.meta),
 				});
 			} else {
 				return await renderBase(reply);
@@ -798,26 +786,22 @@ export class ClientServerService {
 
 		//#region embed pages
 		fastify.get('/embed/*', async (request, reply) => {
-			const meta = await this.metaService.fetch();
-
 			reply.removeHeader('X-Frame-Options');
 
 			reply.header('Cache-Control', 'public, max-age=3600');
 			return await reply.view('base-embed', {
-				title: meta.name ?? 'Misskey',
-				...await this.generateCommonPugData(meta),
+				title: this.meta.name ?? 'Misskey',
+				...await this.generateCommonPugData(this.meta),
 			});
 		});
 
 		fastify.get('/_info_card_', async (request, reply) => {
-			const meta = await this.metaService.fetch(true);
-
 			reply.removeHeader('X-Frame-Options');
 
 			return await reply.view('info-card', {
 				version: this.config.version,
 				host: this.config.host,
-				meta: meta,
+				meta: this.meta,
 				originalUsersCount: await this.usersRepository.countBy({ host: IsNull() }),
 				originalNotesCount: await this.notesRepository.countBy({ userHost: IsNull() }),
 			});
diff --git a/packages/backend/src/server/web/UrlPreviewService.ts b/packages/backend/src/server/web/UrlPreviewService.ts
index 8f8f08a305..5d493c2c46 100644
--- a/packages/backend/src/server/web/UrlPreviewService.ts
+++ b/packages/backend/src/server/web/UrlPreviewService.ts
@@ -8,7 +8,6 @@ import { summaly } from '@misskey-dev/summaly';
 import { SummalyResult } from '@misskey-dev/summaly/built/summary.js';
 import { DI } from '@/di-symbols.js';
 import type { Config } from '@/config.js';
-import { MetaService } from '@/core/MetaService.js';
 import { HttpRequestService } from '@/core/HttpRequestService.js';
 import type Logger from '@/logger.js';
 import { query } from '@/misc/prelude/url.js';
@@ -26,7 +25,9 @@ export class UrlPreviewService {
 		@Inject(DI.config)
 		private config: Config,
 
-		private metaService: MetaService,
+		@Inject(DI.meta)
+		private meta: MiMeta,
+
 		private httpRequestService: HttpRequestService,
 		private loggerService: LoggerService,
 	) {
@@ -62,9 +63,7 @@ export class UrlPreviewService {
 			return;
 		}
 
-		const meta = await this.metaService.fetch();
-
-		if (!meta.urlPreviewEnabled) {
+		if (!this.meta.urlPreviewEnabled) {
 			reply.code(403);
 			return {
 				error: new ApiError({
@@ -75,14 +74,14 @@ export class UrlPreviewService {
 			};
 		}
 
-		this.logger.info(meta.urlPreviewSummaryProxyUrl
+		this.logger.info(this.meta.urlPreviewSummaryProxyUrl
 			? `(Proxy) Getting preview of ${url}@${lang} ...`
 			: `Getting preview of ${url}@${lang} ...`);
 
 		try {
-			const summary = meta.urlPreviewSummaryProxyUrl
-				? await this.fetchSummaryFromProxy(url, meta, lang)
-				: await this.fetchSummary(url, meta, lang);
+			const summary = this.meta.urlPreviewSummaryProxyUrl
+				? await this.fetchSummaryFromProxy(url, this.meta, lang)
+				: await this.fetchSummary(url, this.meta, lang);
 
 			this.logger.succ(`Got preview of ${url}: ${summary.title}`);
 
diff --git a/packages/backend/test-server/entry.ts b/packages/backend/test-server/entry.ts
index 866a7e1f5b..04bf62d209 100644
--- a/packages/backend/test-server/entry.ts
+++ b/packages/backend/test-server/entry.ts
@@ -6,12 +6,16 @@ import { MainModule } from '@/MainModule.js';
 import { ServerService } from '@/server/ServerService.js';
 import { loadConfig } from '@/config.js';
 import { NestLogger } from '@/NestLogger.js';
+import { INestApplicationContext } from '@nestjs/common';
 
 const config = loadConfig();
 const originEnv = JSON.stringify(process.env);
 
 process.env.NODE_ENV = 'test';
 
+let app: INestApplicationContext;
+let serverService: ServerService;
+
 /**
  * テスト用のサーバインスタンスを起動する
  */
@@ -20,10 +24,10 @@ async function launch() {
 
 	console.log('starting application...');
 
-	const app = await NestFactory.createApplicationContext(MainModule, {
+	app = await NestFactory.createApplicationContext(MainModule, {
 		logger: new NestLogger(),
 	});
-	const serverService = app.get(ServerService);
+	serverService = app.get(ServerService);
 	await serverService.launch();
 
 	await startControllerEndpoints();
@@ -71,6 +75,20 @@ async function startControllerEndpoints(port = config.port + 1000) {
 
 	fastify.post<{ Body: { key?: string, value?: string } }>('/env-reset', async (req, res) => {
 		process.env = JSON.parse(originEnv);
+
+		await serverService.dispose();
+		await app.close();
+
+		await killTestServer();
+
+		console.log('starting application...');
+
+		app = await NestFactory.createApplicationContext(MainModule, {
+			logger: new NestLogger(),
+		});
+		serverService = app.get(ServerService);
+		await serverService.launch();
+
 		res.code(200).send({ success: true });
 	});
 
diff --git a/packages/backend/test/jest.setup.ts b/packages/backend/test/jest.setup.ts
index 861bc6db66..7c6dd6a55f 100644
--- a/packages/backend/test/jest.setup.ts
+++ b/packages/backend/test/jest.setup.ts
@@ -6,8 +6,6 @@
 import { initTestDb, sendEnvResetRequest } from './utils.js';
 
 beforeAll(async () => {
-	await Promise.all([
-		initTestDb(false),
-		sendEnvResetRequest(),
-	]);
+		await initTestDb(false);
+		await sendEnvResetRequest();
 });
diff --git a/packages/backend/test/misc/mock-resolver.ts b/packages/backend/test/misc/mock-resolver.ts
index 3c7e796700..c8f3db8aac 100644
--- a/packages/backend/test/misc/mock-resolver.ts
+++ b/packages/backend/test/misc/mock-resolver.ts
@@ -17,6 +17,7 @@ import type { UtilityService } from '@/core/UtilityService.js';
 import { bindThis } from '@/decorators.js';
 import type {
 	FollowRequestsRepository,
+	MiMeta,
 	NoteReactionsRepository,
 	NotesRepository,
 	PollsRepository,
@@ -35,6 +36,7 @@ export class MockResolver extends Resolver {
 	constructor(loggerService: LoggerService) {
 		super(
 			{} as Config,
+			{} as MiMeta,
 			{} as UsersRepository,
 			{} as NotesRepository,
 			{} as PollsRepository,
@@ -42,7 +44,6 @@ export class MockResolver extends Resolver {
 			{} as FollowRequestsRepository,
 			{} as UtilityService,
 			{} as InstanceActorService,
-			{} as MetaService,
 			{} as ApRequestService,
 			{} as HttpRequestService,
 			{} as ApRendererService,
diff --git a/packages/backend/test/unit/RoleService.ts b/packages/backend/test/unit/RoleService.ts
index b6cbe4c520..ef80d25f81 100644
--- a/packages/backend/test/unit/RoleService.ts
+++ b/packages/backend/test/unit/RoleService.ts
@@ -13,6 +13,7 @@ import * as lolex from '@sinonjs/fake-timers';
 import { GlobalModule } from '@/GlobalModule.js';
 import { RoleService } from '@/core/RoleService.js';
 import {
+	MiMeta,
 	MiRole,
 	MiRoleAssignment,
 	MiUser,
@@ -41,7 +42,7 @@ describe('RoleService', () => {
 	let usersRepository: UsersRepository;
 	let rolesRepository: RolesRepository;
 	let roleAssignmentsRepository: RoleAssignmentsRepository;
-	let metaService: jest.Mocked<MetaService>;
+	let meta: jest.Mocked<MiMeta>;
 	let notificationService: jest.Mocked<NotificationService>;
 	let clock: lolex.InstalledClock;
 
@@ -142,7 +143,7 @@ describe('RoleService', () => {
 		rolesRepository = app.get<RolesRepository>(DI.rolesRepository);
 		roleAssignmentsRepository = app.get<RoleAssignmentsRepository>(DI.roleAssignmentsRepository);
 
-		metaService = app.get<MetaService>(MetaService) as jest.Mocked<MetaService>;
+		meta = app.get<MiMeta>(DI.meta) as jest.Mocked<MiMeta>;
 		notificationService = app.get<NotificationService>(NotificationService) as jest.Mocked<NotificationService>;
 
 		await roleService.onModuleInit();
@@ -164,11 +165,9 @@ describe('RoleService', () => {
 	describe('getUserPolicies', () => {
 		test('instance default policies', async () => {
 			const user = await createUser();
-			metaService.fetch.mockResolvedValue({
-				policies: {
-					canManageCustomEmojis: false,
-				},
-			} as any);
+			meta.policies = {
+				canManageCustomEmojis: false,
+			};
 
 			const result = await roleService.getUserPolicies(user.id);
 
@@ -177,11 +176,9 @@ describe('RoleService', () => {
 
 		test('instance default policies 2', async () => {
 			const user = await createUser();
-			metaService.fetch.mockResolvedValue({
-				policies: {
-					canManageCustomEmojis: true,
-				},
-			} as any);
+			meta.policies = {
+				canManageCustomEmojis: true,
+			};
 
 			const result = await roleService.getUserPolicies(user.id);
 
@@ -201,11 +198,9 @@ describe('RoleService', () => {
 				},
 			});
 			await roleService.assign(user.id, role.id);
-			metaService.fetch.mockResolvedValue({
-				policies: {
-					canManageCustomEmojis: false,
-				},
-			} as any);
+			meta.policies = {
+				canManageCustomEmojis: false,
+			};
 
 			const result = await roleService.getUserPolicies(user.id);
 
@@ -236,11 +231,9 @@ describe('RoleService', () => {
 			});
 			await roleService.assign(user.id, role1.id);
 			await roleService.assign(user.id, role2.id);
-			metaService.fetch.mockResolvedValue({
-				policies: {
-					driveCapacityMb: 50,
-				},
-			} as any);
+			meta.policies = {
+				driveCapacityMb: 50,
+			};
 
 			const result = await roleService.getUserPolicies(user.id);
 
@@ -260,11 +253,9 @@ describe('RoleService', () => {
 				},
 			});
 			await roleService.assign(user.id, role.id, new Date(Date.now() + (1000 * 60 * 60 * 24)));
-			metaService.fetch.mockResolvedValue({
-				policies: {
-					canManageCustomEmojis: false,
-				},
-			} as any);
+			meta.policies = {
+				canManageCustomEmojis: false,
+			};
 
 			const result = await roleService.getUserPolicies(user.id);
 			expect(result.canManageCustomEmojis).toBe(true);
diff --git a/packages/backend/test/unit/activitypub.ts b/packages/backend/test/unit/activitypub.ts
index 763ce2b336..2fc08aec91 100644
--- a/packages/backend/test/unit/activitypub.ts
+++ b/packages/backend/test/unit/activitypub.ts
@@ -24,7 +24,6 @@ import { MiMeta, MiNote, UserProfilesRepository } from '@/models/_.js';
 import { DI } from '@/di-symbols.js';
 import { secureRndstr } from '@/misc/secure-rndstr.js';
 import { DownloadService } from '@/core/DownloadService.js';
-import { MetaService } from '@/core/MetaService.js';
 import type { MiRemoteUser } from '@/models/User.js';
 import { genAidx } from '@/misc/id/aidx.js';
 import { MockResolver } from '../misc/mock-resolver.js';
@@ -107,7 +106,14 @@ describe('ActivityPub', () => {
 		sensitiveWords: [] as string[],
 		prohibitedWords: [] as string[],
 	} as MiMeta;
-	let meta = metaInitial;
+	const meta = { ...metaInitial };
+
+	function updateMeta(newMeta: Partial<MiMeta>): void {
+		for (const key in meta) {
+			delete (meta as any)[key];
+		}
+		Object.assign(meta, newMeta);
+	}
 
 	beforeAll(async () => {
 		const app = await Test.createTestingModule({
@@ -120,11 +126,8 @@ describe('ActivityPub', () => {
 					};
 				},
 			})
-			.overrideProvider(MetaService).useValue({
-				async fetch(): Promise<MiMeta> {
-					return meta;
-				},
-			}).compile();
+			.overrideProvider(DI.meta).useFactory({ factory: () => meta })
+			.compile();
 
 		await app.init();
 		app.enableShutdownHooks();
@@ -367,7 +370,7 @@ describe('ActivityPub', () => {
 		});
 
 		test('cacheRemoteFiles=false disables caching', async () => {
-			meta = { ...metaInitial, cacheRemoteFiles: false };
+			updateMeta({ ...metaInitial, cacheRemoteFiles: false });
 
 			const imageObject: IApDocument = {
 				type: 'Document',
@@ -396,7 +399,7 @@ describe('ActivityPub', () => {
 		});
 
 		test('cacheRemoteSensitiveFiles=false only affects sensitive files', async () => {
-			meta = { ...metaInitial, cacheRemoteSensitiveFiles: false };
+			updateMeta({ ...metaInitial, cacheRemoteSensitiveFiles: false });
 
 			const imageObject: IApDocument = {
 				type: 'Document',