diff --git a/packages/backend/src/boot/index.ts b/packages/backend/src/boot/index.ts
index 489350a155..8caf7d062e 100644
--- a/packages/backend/src/boot/index.ts
+++ b/packages/backend/src/boot/index.ts
@@ -4,6 +4,7 @@ import Xev from "xev";
 
 import Logger from "@/services/logger.js";
 import { envOption } from "../env.js";
+import { inspect } from "node:util";
 
 // for typeorm
 import "reflect-metadata";
@@ -82,7 +83,7 @@ if (!envOption.quiet) {
 // Display detail of uncaught exception
 process.on("uncaughtException", (err) => {
 	try {
-		logger.error(err);
+		logger.error(inspect(err));
 	} catch {}
 });
 
diff --git a/packages/backend/src/boot/master.ts b/packages/backend/src/boot/master.ts
index 4099629c44..9418f59e4c 100644
--- a/packages/backend/src/boot/master.ts
+++ b/packages/backend/src/boot/master.ts
@@ -13,6 +13,7 @@ import type { Config } from "@/config/types.js";
 import { envOption } from "@/env.js";
 import { showMachineInfo } from "@/misc/show-machine-info.js";
 import { db, initDb } from "@/db/postgre.js";
+import { inspect } from "node:util";
 
 const _filename = fileURLToPath(import.meta.url);
 const _dirname = dirname(_filename);
@@ -100,7 +101,7 @@ export async function masterMain() {
 		await connectDb();
 	} catch (e) {
 		bootLogger.error(
-			`Fatal error occurred during initialization: ${e}`,
+			`Fatal error occurred during initialization:\n${inspect(e)}`,
 			null,
 			true,
 		);
@@ -182,15 +183,15 @@ async function connectDb(): Promise<void> {
 
 	// Try to connect to DB
 	try {
-		dbLogger.info("Connecting...");
+		dbLogger.info("Connecting to the database...");
 		await initDb();
 		const v = await db
 			.query("SHOW server_version")
 			.then((x) => x[0].server_version);
 		dbLogger.succ(`Connected: v${v}`);
 	} catch (e) {
-		dbLogger.error("Cannot connect", null, true);
-		dbLogger.error(e);
+		dbLogger.error("Failed to connect to the database", null, true);
+		dbLogger.error(inspect(e));
 		process.exit(1);
 	}
 }
diff --git a/packages/backend/src/index.ts b/packages/backend/src/index.ts
index 33b5826a7e..ab4c90b33e 100644
--- a/packages/backend/src/index.ts
+++ b/packages/backend/src/index.ts
@@ -4,10 +4,11 @@
 
 import { EventEmitter } from "node:events";
 import boot from "./boot/index.js";
+import { inspect } from "node:util";
 
 Error.stackTraceLimit = Infinity;
 EventEmitter.defaultMaxListeners = 128;
 
 boot().catch((err) => {
-	console.error(err);
+	console.error(inspect(err));
 });
diff --git a/packages/backend/src/misc/before-shutdown.ts b/packages/backend/src/misc/before-shutdown.ts
index 0820418356..14b0afcd53 100644
--- a/packages/backend/src/misc/before-shutdown.ts
+++ b/packages/backend/src/misc/before-shutdown.ts
@@ -1,6 +1,7 @@
 // https://gist.github.com/nfantone/1eaa803772025df69d07f4dbf5df7e58
 
 "use strict";
+const inspect = require("node:util");
 
 /**
  * @callback BeforeShutdownListener
@@ -71,9 +72,7 @@ async function shutdownHandler(signalOrEvent: string) {
 		} catch (err) {
 			if (err instanceof Error) {
 				console.warn(
-					`A shutdown handler failed before completing with: ${
-						err.message || err
-					}`,
+					`A shutdown handler failed before completing with:\n${inspect(err)}`,
 				);
 			}
 		}
diff --git a/packages/backend/src/misc/captcha.ts b/packages/backend/src/misc/captcha.ts
index b3b3dca39d..c163d4d82d 100644
--- a/packages/backend/src/misc/captcha.ts
+++ b/packages/backend/src/misc/captcha.ts
@@ -2,6 +2,7 @@ import fetch from "node-fetch";
 import { URLSearchParams } from "node:url";
 import { getAgentByUrl } from "@/misc/fetch.js";
 import config from "@/config/index.js";
+import { inspect } from "node:util";
 
 export async function verifyRecaptcha(secret: string, response: string) {
 	const result = await getCaptchaResponse(
@@ -9,7 +10,7 @@ export async function verifyRecaptcha(secret: string, response: string) {
 		secret,
 		response,
 	).catch((e) => {
-		throw new Error(`recaptcha-request-failed: ${e.message}`);
+		throw new Error(`recaptcha-request-failed:\n${inspect(e)}`);
 	});
 
 	if (result.success !== true) {
@@ -26,7 +27,7 @@ export async function verifyHcaptcha(secret: string, response: string) {
 		secret,
 		response,
 	).catch((e) => {
-		throw new Error(`hcaptcha-request-failed: ${e.message}`);
+		throw new Error(`hcaptcha-request-failed:\n${inspect(e)}`);
 	});
 
 	if (result.success !== true) {
@@ -62,7 +63,7 @@ async function getCaptchaResponse(
 		//timeout: 10 * 1000,
 		agent: getAgentByUrl,
 	}).catch((e) => {
-		throw new Error(`${e.message || e}`);
+		throw new Error(`${inspect(e)}`);
 	});
 
 	if (!res.ok) {
diff --git a/packages/backend/src/misc/emoji-meta.ts b/packages/backend/src/misc/emoji-meta.ts
index 2b9365b826..539a034817 100644
--- a/packages/backend/src/misc/emoji-meta.ts
+++ b/packages/backend/src/misc/emoji-meta.ts
@@ -5,6 +5,7 @@ import { FILE_TYPE_BROWSERSAFE } from "@/const.js";
 import Logger from "@/services/logger.js";
 import { Cache } from "./cache.js";
 import { redisClient } from "@/db/redis.js";
+import { inspect } from "node:util";
 
 export type Size = {
 	width: number;
@@ -44,7 +45,7 @@ export async function getEmojiSize(url: string): Promise<Size> {
 		}
 		return { width, height };
 	} catch (e) {
-		throw new Error(`Unable to retrieve metadata: ${e}`);
+		throw new Error(`Unable to retrieve metadata:\n${inspect(e)}`);
 	}
 }
 
diff --git a/packages/backend/src/misc/get-file-info.ts b/packages/backend/src/misc/get-file-info.ts
index 4195ed7aa4..dadbda9e9e 100644
--- a/packages/backend/src/misc/get-file-info.ts
+++ b/packages/backend/src/misc/get-file-info.ts
@@ -7,6 +7,7 @@ import probeImageSize from "probe-image-size";
 import isSvg from "is-svg";
 import sharp from "sharp";
 import { encode } from "blurhash";
+import { inspect } from "node:util";
 
 const pipeline = util.promisify(stream.pipeline);
 
@@ -65,7 +66,7 @@ export async function getFileInfo(path: string): Promise<FileInfo> {
 		].includes(type.mime)
 	) {
 		const imageSize = await detectImageSize(path).catch((e) => {
-			warnings.push(`detectImageSize failed: ${e}`);
+			warnings.push(`detectImageSize failed:\n${inspect(e)}`);
 			return undefined;
 		});
 
@@ -102,7 +103,7 @@ export async function getFileInfo(path: string): Promise<FileInfo> {
 		].includes(type.mime)
 	) {
 		blurhash = await getBlurhash(path).catch((e) => {
-			warnings.push(`getBlurhash failed: ${e}`);
+			warnings.push(`getBlurhash failed:\n${inspect(e)}`);
 			return undefined;
 		});
 	}
diff --git a/packages/backend/src/misc/i18n.ts b/packages/backend/src/misc/i18n.ts
index 742bdb0f69..48c741f80e 100644
--- a/packages/backend/src/misc/i18n.ts
+++ b/packages/backend/src/misc/i18n.ts
@@ -21,7 +21,7 @@ export class I18n<T extends Record<string, any>> {
 				}
 			}
 			return str;
-		} catch (e) {
+		} catch {
 			console.warn(`missing localization '${key}'`);
 			return key;
 		}
diff --git a/packages/backend/src/misc/process-masto-notes.ts b/packages/backend/src/misc/process-masto-notes.ts
index 1327b4cff0..03968944ec 100644
--- a/packages/backend/src/misc/process-masto-notes.ts
+++ b/packages/backend/src/misc/process-masto-notes.ts
@@ -8,6 +8,7 @@ import * as tar from "tar-stream";
 import gunzip from "gunzip-maybe";
 import decompress from "decompress";
 import * as Path from "node:path";
+import { inspect } from "node:util";
 
 const logger = new Logger("process-masto-notes");
 
@@ -103,7 +104,7 @@ function unzipZip(fn: string, dir: string) {
 function unzipTarGz(fn: string, dir: string) {
 	return new Promise(async (resolve, reject) => {
 		const onErr = (err: any) => {
-			logger.error(`pipe broken: ${err}`);
+			logger.error(`pipe broken:\n${inspect(err)}`);
 			reject();
 		};
 		try {
@@ -120,7 +121,7 @@ function unzipTarGz(fn: string, dir: string) {
 						.on("error", onErr);
 					next();
 				} catch (e) {
-					logger.error(`create dir error:${e}`);
+					logger.error(`create dir error:\n${inspect(e)}`);
 					reject();
 				}
 			});
@@ -136,7 +137,7 @@ function unzipTarGz(fn: string, dir: string) {
 				.pipe(extract)
 				.on("error", onErr);
 		} catch (e) {
-			logger.error(`unzipTarGz error: ${e}`);
+			logger.error(`unzipTarGz error:\n${inspect(e)}`);
 			reject();
 		}
 	});
diff --git a/packages/backend/src/queue/processors/background/index-all-notes.ts b/packages/backend/src/queue/processors/background/index-all-notes.ts
index 262724cbd6..115f2147b6 100644
--- a/packages/backend/src/queue/processors/background/index-all-notes.ts
+++ b/packages/backend/src/queue/processors/background/index-all-notes.ts
@@ -7,6 +7,7 @@ import { MoreThan } from "typeorm";
 import { index } from "@/services/note/create.js";
 import { Note } from "@/models/entities/note.js";
 import meilisearch from "@/db/meilisearch.js";
+import { inspect } from "node:util";
 
 const logger = queueLogger.createSubLogger("index-all-notes");
 
@@ -43,7 +44,7 @@ export default async function indexAllNotes(
 				relations: ["user"],
 			});
 		} catch (e: any) {
-			logger.error(`Failed to query notes ${e}`);
+			logger.error(`Failed to query notes:\n${inspect(e)}`);
 			done(e);
 			break;
 		}
diff --git a/packages/backend/src/queue/processors/db/export-custom-emojis.ts b/packages/backend/src/queue/processors/db/export-custom-emojis.ts
index 86de43af42..a1ca3a91c5 100644
--- a/packages/backend/src/queue/processors/db/export-custom-emojis.ts
+++ b/packages/backend/src/queue/processors/db/export-custom-emojis.ts
@@ -11,6 +11,7 @@ import { createTemp, createTempDir } from "@/misc/create-temp.js";
 import { downloadUrl } from "@/misc/download-url.js";
 import config from "@/config/index.js";
 import { IsNull } from "typeorm";
+import { inspect } from "node:util";
 
 const logger = queueLogger.createSubLogger("export-custom-emojis");
 
@@ -76,7 +77,7 @@ export async function exportCustomEmojis(
 			downloaded = true;
 		} catch (e) {
 			// TODO: 何度か再試行
-			logger.error(e instanceof Error ? e : new Error(e as string));
+			logger.error(inspect(e));
 		}
 
 		if (!downloaded) {
diff --git a/packages/backend/src/queue/processors/db/import-blocking.ts b/packages/backend/src/queue/processors/db/import-blocking.ts
index 290c9dbceb..4d2732e32f 100644
--- a/packages/backend/src/queue/processors/db/import-blocking.ts
+++ b/packages/backend/src/queue/processors/db/import-blocking.ts
@@ -9,6 +9,7 @@ import { Users, DriveFiles } from "@/models/index.js";
 import type { DbUserImportJobData } from "@/queue/types.js";
 import block from "@/services/blocking/create.js";
 import { IsNull } from "typeorm";
+import { inspect } from "node:util";
 
 const logger = queueLogger.createSubLogger("import-blocking");
 
@@ -70,7 +71,7 @@ export async function importBlocking(
 
 			await block(user, target);
 		} catch (e) {
-			logger.warn(`Error in line:${linenum} ${e}`);
+			logger.warn(`Error in line ${linenum}:\n${inspect(e)}`);
 		}
 	}
 
diff --git a/packages/backend/src/queue/processors/db/import-following.ts b/packages/backend/src/queue/processors/db/import-following.ts
index b1a7cd2c9b..a08cf6c751 100644
--- a/packages/backend/src/queue/processors/db/import-following.ts
+++ b/packages/backend/src/queue/processors/db/import-following.ts
@@ -9,6 +9,7 @@ import { Users, DriveFiles } from "@/models/index.js";
 import type { DbUserImportJobData } from "@/queue/types.js";
 import { queueLogger } from "../../logger.js";
 import type Bull from "bull";
+import { inspect } from "node:util";
 
 const logger = queueLogger.createSubLogger("import-following");
 
@@ -68,7 +69,7 @@ export async function importFollowing(
 
 				follow(user, target);
 			} catch (e) {
-				logger.warn(`Error in line:${linenum} ${e}`);
+				logger.warn(`Error in line ${linenum}:\n${inspect(e)}`);
 			}
 		}
 	} else {
@@ -106,7 +107,7 @@ export async function importFollowing(
 
 				follow(user, target);
 			} catch (e) {
-				logger.warn(`Error in line:${linenum} ${e}`);
+				logger.warn(`Error in line ${linenum}:\n${inspect(e)}`);
 			}
 		}
 	}
diff --git a/packages/backend/src/queue/processors/db/import-muting.ts b/packages/backend/src/queue/processors/db/import-muting.ts
index 80e0567397..8a378ef6ab 100644
--- a/packages/backend/src/queue/processors/db/import-muting.ts
+++ b/packages/backend/src/queue/processors/db/import-muting.ts
@@ -10,6 +10,7 @@ import type { DbUserImportJobData } from "@/queue/types.js";
 import type { User } from "@/models/entities/user.js";
 import { genId } from "@/misc/gen-id.js";
 import { IsNull } from "typeorm";
+import { inspect } from "node:util";
 
 const logger = queueLogger.createSubLogger("import-muting");
 
@@ -71,7 +72,7 @@ export async function importMuting(
 
 			await mute(user, target);
 		} catch (e) {
-			logger.warn(`Error in line:${linenum} ${e}`);
+			logger.warn(`Error in line ${linenum}: ${inspect(e)}`);
 		}
 	}
 
diff --git a/packages/backend/src/queue/processors/db/import-posts.ts b/packages/backend/src/queue/processors/db/import-posts.ts
index 526489c634..eee74bddeb 100644
--- a/packages/backend/src/queue/processors/db/import-posts.ts
+++ b/packages/backend/src/queue/processors/db/import-posts.ts
@@ -8,6 +8,7 @@ import {
 	createImportCkPostJob,
 	createImportMastoPostJob,
 } from "@/queue/index.js";
+import { inspect } from "node:util";
 
 const logger = queueLogger.createSubLogger("import-posts");
 
@@ -44,7 +45,7 @@ export async function importPosts(
 			}
 		} catch (e) {
 			// handle error
-			logger.warn(`Failed reading Mastodon archive: ${e}`);
+			logger.warn(`Failed to read Mastodon archive:\n${inspect(e)}`);
 		}
 		logger.succ("Mastodon archive imported");
 		done();
@@ -69,7 +70,7 @@ export async function importPosts(
 		}
 	} catch (e) {
 		// handle error
-		logger.warn(`Error reading: ${e}`);
+		logger.warn(`Error occured while reading:\n${inspect(e)}`);
 	}
 
 	logger.succ("Imported");
diff --git a/packages/backend/src/queue/processors/db/import-user-lists.ts b/packages/backend/src/queue/processors/db/import-user-lists.ts
index 0c23f06991..886c316041 100644
--- a/packages/backend/src/queue/processors/db/import-user-lists.ts
+++ b/packages/backend/src/queue/processors/db/import-user-lists.ts
@@ -15,6 +15,7 @@ import {
 import { genId } from "@/misc/gen-id.js";
 import type { DbUserImportJobData } from "@/queue/types.js";
 import { IsNull } from "typeorm";
+import { inspect } from "node:util";
 
 const logger = queueLogger.createSubLogger("import-user-lists");
 
@@ -87,7 +88,7 @@ export async function importUserLists(
 
 			pushUserToUserList(target, list!);
 		} catch (e) {
-			logger.warn(`Error in line:${linenum} ${e}`);
+			logger.warn(`Error in line ${linenum}:\n${inspect(e)}`);
 		}
 	}
 
diff --git a/packages/backend/src/queue/processors/inbox.ts b/packages/backend/src/queue/processors/inbox.ts
index 116f279ac3..54364d1a72 100644
--- a/packages/backend/src/queue/processors/inbox.ts
+++ b/packages/backend/src/queue/processors/inbox.ts
@@ -23,6 +23,7 @@ import type { CacheableRemoteUser } from "@/models/entities/user.js";
 import type { UserPublickey } from "@/models/entities/user-publickey.js";
 import { shouldBlockInstance } from "@/misc/should-block-instance.js";
 import { verifySignature } from "@/remote/activitypub/check-fetch.js";
+import { inspect } from "node:util";
 
 const logger = new Logger("inbox");
 
@@ -78,9 +79,7 @@ export default async (job: Bull.Job<InboxJobData>): Promise<string> => {
 				if (e.isClientError) {
 					return `skip: Ignored deleted actors on both ends ${activity.actor} - ${e.statusCode}`;
 				}
-				throw new Error(
-					`Error in actor ${activity.actor} - ${e.statusCode || e}`,
-				);
+				throw new Error(`Error in actor ${activity.actor}\n${inspect(e)}`);
 			}
 		}
 	}
diff --git a/packages/backend/src/queue/processors/system/local-emoji-size.ts b/packages/backend/src/queue/processors/system/local-emoji-size.ts
index d696bbd863..73595ed77b 100644
--- a/packages/backend/src/queue/processors/system/local-emoji-size.ts
+++ b/packages/backend/src/queue/processors/system/local-emoji-size.ts
@@ -4,6 +4,7 @@ import { Emojis } from "@/models/index.js";
 
 import { queueLogger } from "../../logger.js";
 import { getEmojiSize } from "@/misc/emoji-meta.js";
+import { inspect } from "node:util";
 
 const logger = queueLogger.createSubLogger("local-emoji-size");
 
@@ -27,7 +28,7 @@ export async function setLocalEmojiSizes(
 			});
 		} catch (e) {
 			logger.error(
-				`Unable to set emoji size (${i + 1}/${emojis.length}): ${e}`,
+				`Unable to set emoji size (${i + 1}/${emojis.length}):\n${inspect(e)}`,
 			);
 			/* skip if any error happens */
 		} finally {
diff --git a/packages/backend/src/queue/processors/system/verify-links.ts b/packages/backend/src/queue/processors/system/verify-links.ts
index 4ee88c6310..230e55de52 100644
--- a/packages/backend/src/queue/processors/system/verify-links.ts
+++ b/packages/backend/src/queue/processors/system/verify-links.ts
@@ -4,6 +4,7 @@ import { UserProfiles } from "@/models/index.js";
 import { Not } from "typeorm";
 import { queueLogger } from "../../logger.js";
 import { verifyLink } from "@/services/fetch-rel-me.js";
+import { inspect } from "node:util";
 
 const logger = queueLogger.createSubLogger("verify-links");
 
@@ -32,7 +33,7 @@ export async function verifyLinks(
 					fields: user.fields,
 				});
 			} catch (e) {
-				logger.error(`Failed to update user ${user.userId} ${e}`);
+				logger.error(`Failed to update user ${user.userId}:\n${inspect(e)}`);
 				done(e);
 			}
 		}
diff --git a/packages/backend/src/remote/activitypub/deliver-manager.ts b/packages/backend/src/remote/activitypub/deliver-manager.ts
index c97d1c99ae..c4f8ca2069 100644
--- a/packages/backend/src/remote/activitypub/deliver-manager.ts
+++ b/packages/backend/src/remote/activitypub/deliver-manager.ts
@@ -3,6 +3,8 @@ import { Users, Followings } from "@/models/index.js";
 import type { ILocalUser, IRemoteUser, User } from "@/models/entities/user.js";
 import { deliver } from "@/queue/index.js";
 import { skippedInstances } from "@/misc/skipped-instances.js";
+import { apLogger } from "./logger";
+import { inspect } from "node:util";
 
 //#region types
 interface IRecipe {
@@ -131,8 +133,7 @@ export default class DeliverManager {
 					host: new URL(inbox).host,
 				});
 			} catch (error) {
-				console.error(error);
-				console.error(`Invalid Inbox ${inbox}`);
+				apLogger.error(`Invalid Inbox ${inbox}:\n${inspect(error)}`);
 			}
 		}
 
diff --git a/packages/backend/src/remote/activitypub/kernel/accept/index.ts b/packages/backend/src/remote/activitypub/kernel/accept/index.ts
index 5c73760ff3..bb03bf9a62 100644
--- a/packages/backend/src/remote/activitypub/kernel/accept/index.ts
+++ b/packages/backend/src/remote/activitypub/kernel/accept/index.ts
@@ -4,6 +4,7 @@ import acceptFollow from "./follow.js";
 import type { IAccept } from "../../type.js";
 import { isFollow, getApType } from "../../type.js";
 import { apLogger } from "../../logger.js";
+import { inspect } from "node:util";
 
 const logger = apLogger;
 
@@ -18,7 +19,7 @@ export default async (
 	const resolver = new Resolver();
 
 	const object = await resolver.resolve(activity.object).catch((e) => {
-		logger.error(`Resolution failed: ${e}`);
+		logger.error(`Resolution failed:\n${inspect(e)}`);
 		throw e;
 	});
 
diff --git a/packages/backend/src/remote/activitypub/kernel/announce/note.ts b/packages/backend/src/remote/activitypub/kernel/announce/note.ts
index 50b59932cf..cc33b681eb 100644
--- a/packages/backend/src/remote/activitypub/kernel/announce/note.ts
+++ b/packages/backend/src/remote/activitypub/kernel/announce/note.ts
@@ -11,6 +11,7 @@ import { parseAudience } from "../../audience.js";
 import { StatusError } from "@/misc/fetch.js";
 import { Notes } from "@/models/index.js";
 import { shouldBlockInstance } from "@/misc/should-block-instance.js";
+import { inspect } from "node:util";
 
 const logger = apLogger;
 
@@ -53,9 +54,7 @@ export default async function (
 					return;
 				}
 
-				logger.warn(
-					`Error in announce target ${targetUri} - ${e.statusCode || e}`,
-				);
+				logger.warn(`Error in announce target ${targetUri}:\n${inspect(e)}`);
 			}
 			throw e;
 		}
diff --git a/packages/backend/src/remote/activitypub/kernel/create/index.ts b/packages/backend/src/remote/activitypub/kernel/create/index.ts
index 3dcf648247..d3bc1936d5 100644
--- a/packages/backend/src/remote/activitypub/kernel/create/index.ts
+++ b/packages/backend/src/remote/activitypub/kernel/create/index.ts
@@ -5,6 +5,7 @@ import type { ICreate } from "../../type.js";
 import { getApId, isPost, getApType } from "../../type.js";
 import { apLogger } from "../../logger.js";
 import { toArray, concat, unique } from "@/prelude/array.js";
+import { inspect } from "node:util";
 
 const logger = apLogger;
 
@@ -39,7 +40,7 @@ export default async (
 	const resolver = new Resolver();
 
 	const object = await resolver.resolve(activity.object).catch((e) => {
-		logger.error(`Resolution failed: ${e}`);
+		logger.error(`Resolution failed:\n${inspect(e)}`);
 		throw e;
 	});
 
diff --git a/packages/backend/src/remote/activitypub/kernel/index.ts b/packages/backend/src/remote/activitypub/kernel/index.ts
index a90ac02345..aa99f6c320 100644
--- a/packages/backend/src/remote/activitypub/kernel/index.ts
+++ b/packages/backend/src/remote/activitypub/kernel/index.ts
@@ -40,6 +40,7 @@ import move from "./move/index.js";
 import type { IObject, IActivity } from "../type.js";
 import { extractDbHost } from "@/misc/convert-host.js";
 import { shouldBlockInstance } from "@/misc/should-block-instance.js";
+import { inspect } from "node:util";
 
 export async function performActivity(
 	actor: CacheableRemoteUser,
@@ -54,9 +55,7 @@ export async function performActivity(
 			try {
 				await performOneActivity(actor, act);
 			} catch (err) {
-				if (err instanceof Error || typeof err === "string") {
-					apLogger.error(err);
-				}
+				apLogger.error(inspect(err));
 			}
 		}
 	} else {
@@ -90,9 +89,9 @@ async function performOneActivity(
 	} else if (isReject(activity)) {
 		await reject(actor, activity);
 	} else if (isAdd(activity)) {
-		await add(actor, activity).catch((err) => apLogger.error(err));
+		await add(actor, activity).catch((err) => apLogger.error(inspect(err)));
 	} else if (isRemove(activity)) {
-		await remove(actor, activity).catch((err) => apLogger.error(err));
+		await remove(actor, activity).catch((err) => apLogger.error(inspect(err)));
 	} else if (isAnnounce(activity)) {
 		await announce(actor, activity);
 	} else if (isLike(activity)) {
diff --git a/packages/backend/src/remote/activitypub/kernel/reject/index.ts b/packages/backend/src/remote/activitypub/kernel/reject/index.ts
index 10edb0f7a2..001231d030 100644
--- a/packages/backend/src/remote/activitypub/kernel/reject/index.ts
+++ b/packages/backend/src/remote/activitypub/kernel/reject/index.ts
@@ -4,6 +4,7 @@ import rejectFollow from "./follow.js";
 import type { IReject } from "../../type.js";
 import { isFollow, getApType } from "../../type.js";
 import { apLogger } from "../../logger.js";
+import { inspect } from "node:util";
 
 const logger = apLogger;
 
@@ -18,7 +19,7 @@ export default async (
 	const resolver = new Resolver();
 
 	const object = await resolver.resolve(activity.object).catch((e) => {
-		logger.error(`Resolution failed: ${e}`);
+		logger.error(`Resolution failed:\n${inspect(e)}`);
 		throw e;
 	});
 
diff --git a/packages/backend/src/remote/activitypub/kernel/undo/index.ts b/packages/backend/src/remote/activitypub/kernel/undo/index.ts
index f0e2316fab..c1c18271f9 100644
--- a/packages/backend/src/remote/activitypub/kernel/undo/index.ts
+++ b/packages/backend/src/remote/activitypub/kernel/undo/index.ts
@@ -15,6 +15,7 @@ import undoAccept from "./accept.js";
 import { undoAnnounce } from "./announce.js";
 import Resolver from "../../resolver.js";
 import { apLogger } from "../../logger.js";
+import { inspect } from "node:util";
 
 const logger = apLogger;
 
@@ -33,7 +34,7 @@ export default async (
 	const resolver = new Resolver();
 
 	const object = await resolver.resolve(activity.object).catch((e) => {
-		logger.error(`Resolution failed: ${e}`);
+		logger.error(`Resolution failed:\n${inspect(e)}`);
 		throw e;
 	});
 
diff --git a/packages/backend/src/remote/activitypub/kernel/update/index.ts b/packages/backend/src/remote/activitypub/kernel/update/index.ts
index 558a20ce0f..933f2c99e0 100644
--- a/packages/backend/src/remote/activitypub/kernel/update/index.ts
+++ b/packages/backend/src/remote/activitypub/kernel/update/index.ts
@@ -5,6 +5,7 @@ import { apLogger } from "../../logger.js";
 import { updateNote } from "../../models/note.js";
 import Resolver from "../../resolver.js";
 import { updatePerson } from "../../models/person.js";
+import { inspect } from "node:util";
 
 /**
  * Handler for the Update activity
@@ -22,7 +23,7 @@ export default async (
 	const resolver = new Resolver();
 
 	const object = await resolver.resolve(activity.object).catch((e) => {
-		apLogger.error(`Resolution failed: ${e}`);
+		apLogger.error(`Resolution failed:\n${inspect(e)}`);
 		throw e;
 	});
 
diff --git a/packages/backend/src/remote/activitypub/models/note.ts b/packages/backend/src/remote/activitypub/models/note.ts
index fb617953e5..19b8fe49e7 100644
--- a/packages/backend/src/remote/activitypub/models/note.ts
+++ b/packages/backend/src/remote/activitypub/models/note.ts
@@ -50,6 +50,7 @@ import { DB_MAX_IMAGE_COMMENT_LENGTH } from "@/misc/hard-limits.js";
 import { truncate } from "@/misc/truncate.js";
 import { type Size, getEmojiSize } from "@/misc/emoji-meta.js";
 import { langmap } from "@/misc/langmap.js";
+import { inspect } from "node:util";
 
 const logger = apLogger;
 
@@ -242,9 +243,7 @@ export async function createNote(
 						}
 					}
 
-					logger.warn(
-						`Error in inReplyTo ${note.inReplyTo} - ${e.statusCode || e}`,
-					);
+					logger.warn(`Error in inReplyTo ${note.inReplyTo}:\n${inspect(e)}`);
 					throw e;
 				})
 		: null;
@@ -359,7 +358,7 @@ export async function createNote(
 	}
 
 	const emojis = await extractEmojis(note.tag || [], actor.host).catch((e) => {
-		logger.info(`extractEmojis: ${e}`);
+		logger.info(`extractEmojis:\n${inspect(e)}`);
 		return [] as Emoji[];
 	});
 
diff --git a/packages/backend/src/remote/activitypub/models/person.ts b/packages/backend/src/remote/activitypub/models/person.ts
index 9030d3d904..72bcc15c44 100644
--- a/packages/backend/src/remote/activitypub/models/person.ts
+++ b/packages/backend/src/remote/activitypub/models/person.ts
@@ -47,6 +47,7 @@ import Resolver from "../resolver.js";
 import { extractApHashtags } from "./tag.js";
 import { resolveNote, extractEmojis } from "./note.js";
 import { resolveImage } from "./image.js";
+import { inspect } from "node:util";
 
 const logger = apLogger;
 
@@ -349,7 +350,7 @@ export async function createPerson(
 				throw new Error("already registered");
 			}
 		} else {
-			logger.error(e instanceof Error ? e : new Error(e as string));
+			logger.error(inspect(e));
 			throw e;
 		}
 	}
@@ -389,7 +390,7 @@ export async function createPerson(
 
 	//#region Get custom emoji
 	const emojis = await extractEmojis(person.tag || [], host).catch((e) => {
-		logger.info(`extractEmojis: ${e}`);
+		logger.info(`extractEmojis:\n${inspect(e)}`);
 		return [] as Emoji[];
 	});
 
@@ -400,7 +401,9 @@ export async function createPerson(
 	});
 	//#endregion
 
-	await updateFeatured(user!.id, resolver).catch((err) => logger.error(err));
+	await updateFeatured(user!.id, resolver).catch((err) =>
+		logger.error(inspect(err)),
+	);
 
 	return user!;
 }
@@ -451,7 +454,7 @@ export async function updatePerson(
 
 	// Custom pictogram acquisition
 	const emojis = await extractEmojis(person.tag || [], user.host).catch((e) => {
-		logger.info(`extractEmojis: ${e}`);
+		logger.info(`extractEmojis:\n${inspect(e)}`);
 		return [] as Emoji[];
 	});
 
@@ -617,7 +620,9 @@ export async function updatePerson(
 		},
 	);
 
-	await updateFeatured(user.id, resolver).catch((err) => logger.error(err));
+	await updateFeatured(user.id, resolver).catch((err) =>
+		logger.error(inspect(err)),
+	);
 }
 
 /**
diff --git a/packages/backend/src/remote/resolve-user.ts b/packages/backend/src/remote/resolve-user.ts
index a6c1e399a5..f73b670273 100644
--- a/packages/backend/src/remote/resolve-user.ts
+++ b/packages/backend/src/remote/resolve-user.ts
@@ -8,6 +8,7 @@ import { toPuny } from "@/misc/convert-host.js";
 import webFinger from "./webfinger.js";
 import { createPerson, updatePerson } from "./activitypub/models/person.js";
 import { remoteLogger } from "./logger.js";
+import { inspect } from "node:util";
 
 const logger = remoteLogger.createSubLogger("resolve-user");
 
@@ -118,9 +119,7 @@ async function resolveSelf(acctLower: string) {
 	logger.info(`WebFinger for ${chalk.yellow(acctLower)}`);
 	const finger = await webFinger(acctLower).catch((e) => {
 		logger.error(
-			`Failed to WebFinger for ${chalk.yellow(acctLower)}: ${
-				e.statusCode || e.message
-			}`,
+			`Failed to WebFinger for ${chalk.yellow(acctLower)}:\n${inspect(e)}`,
 		);
 		throw new Error(
 			`Failed to WebFinger for ${acctLower}: ${e.statusCode || e.message}`,
diff --git a/packages/backend/src/server/activitypub.ts b/packages/backend/src/server/activitypub.ts
index 660db98e48..7c437d3d6d 100644
--- a/packages/backend/src/server/activitypub.ts
+++ b/packages/backend/src/server/activitypub.ts
@@ -58,7 +58,7 @@ function inbox(ctx: Router.RouterContext) {
 			headers: ["(request-target)", "digest", "host", "date"],
 		});
 	} catch (e) {
-		serverLogger.warn(`inbox: signature parse error: ${inspect(e)}`);
+		serverLogger.warn(`inbox: signature parse error:\n${inspect(e)}`);
 		ctx.status = 401;
 
 		if (e instanceof Error) {
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 b4a345306b..a3e3fafa2f 100644
--- a/packages/backend/src/server/api/endpoints/drive/files/create.ts
+++ b/packages/backend/src/server/api/endpoints/drive/files/create.ts
@@ -7,6 +7,7 @@ import { MINUTE } from "@/const.js";
 import define from "@/server/api/define.js";
 import { apiLogger } from "@/server/api/logger.js";
 import { ApiError } from "@/server/api/error.js";
+import { inspect } from "node:util";
 
 export const meta = {
 	tags: ["drive"],
@@ -112,9 +113,8 @@ export default define(
 			});
 			return await DriveFiles.pack(driveFile, { self: true });
 		} catch (e) {
-			if (e instanceof Error || typeof e === "string") {
-				apiLogger.error(e);
-			}
+			if (typeof e === "string") apiLogger.error(e);
+			if (e instanceof Error) apiLogger.error(inspect(e));
 			if (e instanceof IdentifiableError) {
 				if (e.id === "282f77bf-5816-4f72-9264-aa14d8261a21")
 					throw new ApiError(meta.errors.inappropriate);
diff --git a/packages/backend/src/server/api/endpoints/i/known-as.ts b/packages/backend/src/server/api/endpoints/i/known-as.ts
index 39bf6fff83..070d6d7f00 100644
--- a/packages/backend/src/server/api/endpoints/i/known-as.ts
+++ b/packages/backend/src/server/api/endpoints/i/known-as.ts
@@ -9,6 +9,7 @@ import { apiLogger } from "@/server/api/logger.js";
 import define from "@/server/api/define.js";
 import { ApiError } from "@/server/api/error.js";
 import { parse } from "@/misc/acct.js";
+import { inspect } from "node:util";
 
 export const meta = {
 	tags: ["users"],
@@ -74,7 +75,7 @@ export default define(meta, paramDef, async (ps, user) => {
 		const { username, host } = parse(line);
 
 		const aka = await resolveUser(username, host).catch((e) => {
-			apiLogger.warn(`failed to resolve remote user: ${e}`);
+			apiLogger.warn(`failed to resolve remote user:\n${inspect(e)}`);
 			throw new ApiError(meta.errors.noSuchUser);
 		});
 
diff --git a/packages/backend/src/server/api/endpoints/i/move.ts b/packages/backend/src/server/api/endpoints/i/move.ts
index c6d1205f98..6bd76a621d 100644
--- a/packages/backend/src/server/api/endpoints/i/move.ts
+++ b/packages/backend/src/server/api/endpoints/i/move.ts
@@ -13,6 +13,7 @@ import { Followings, Users } from "@/models/index.js";
 import config from "@/config/index.js";
 import { publishMainStream } from "@/services/stream.js";
 import { parse } from "@/misc/acct.js";
+import { inspect } from "node:util";
 
 export const meta = {
 	tags: ["users"],
@@ -99,7 +100,7 @@ export default define(meta, paramDef, async (ps, user) => {
 	if (!host) throw new ApiError(meta.errors.notRemote);
 
 	const moveTo: User = await resolveUser(username, host).catch((e) => {
-		apiLogger.warn(`failed to resolve remote user: ${e}`);
+		apiLogger.warn(`failed to resolve remote user:\n${inspect(e)}`);
 		throw new ApiError(meta.errors.noSuchMoveTarget);
 	});
 	let fromUrl: string | null = user.uri;
diff --git a/packages/backend/src/server/api/index.ts b/packages/backend/src/server/api/index.ts
index 1eb55a77e0..1bb8ad4939 100644
--- a/packages/backend/src/server/api/index.ts
+++ b/packages/backend/src/server/api/index.ts
@@ -22,8 +22,10 @@ import signupPending from "./private/signup-pending.js";
 import verifyEmail from "./private/verify-email.js";
 import { koaBody } from "koa-body";
 import { convertAttachment } from "./mastodon/converters.js";
+import { apiLogger } from "./logger.js";
 
 import { convertId, IdConvertType as IdType } from "backend-rs";
+import { inspect } from "node:util";
 
 // re-export native rust id conversion (function and enum)
 export { IdType, convertId };
@@ -90,7 +92,7 @@ mastoFileRouter.post("/v1/media", upload.single("file"), async (ctx) => {
 		const data = await client.uploadMedia(multipartData);
 		ctx.body = convertAttachment(data.data as Entity.Attachment);
 	} catch (e: any) {
-		console.error(e);
+		apiLogger.error(inspect(e));
 		ctx.status = 401;
 		ctx.body = e.response.data;
 	}
@@ -109,7 +111,7 @@ mastoFileRouter.post("/v2/media", upload.single("file"), async (ctx) => {
 		const data = await client.uploadMedia(multipartData, ctx.request.body);
 		ctx.body = convertAttachment(data.data as Entity.Attachment);
 	} catch (e: any) {
-		console.error(e);
+		apiLogger.error(inspect(e));
 		ctx.status = 401;
 		ctx.body = e.response.data;
 	}
diff --git a/packages/backend/src/server/api/mastodon/ApiMastodonCompatibleService.ts b/packages/backend/src/server/api/mastodon/ApiMastodonCompatibleService.ts
index e029bc604e..ec3600537c 100644
--- a/packages/backend/src/server/api/mastodon/ApiMastodonCompatibleService.ts
+++ b/packages/backend/src/server/api/mastodon/ApiMastodonCompatibleService.ts
@@ -16,6 +16,8 @@ import {
 import { convertId, IdType } from "@/server/api/index.js";
 import { Users } from "@/models/index.js";
 import { IsNull } from "typeorm";
+import { apiLogger } from "../logger.js";
+import { inspect } from "node:util";
 
 export function getClient(
 	BASE_URL: string,
@@ -45,7 +47,7 @@ export function apiMastodonCompatible(router: Router): void {
 			const data = await client.getInstanceCustomEmojis();
 			ctx.body = data.data;
 		} catch (e: any) {
-			console.error(e);
+			apiLogger.error(inspect(e));
 			ctx.status = 401;
 			ctx.body = e.response.data;
 		}
@@ -73,7 +75,7 @@ export function apiMastodonCompatible(router: Router): void {
 					: convertAccount((await client.getAccount(admin.id)).data);
 			ctx.body = await getInstance(data.data, contact);
 		} catch (e: any) {
-			console.error(e);
+			apiLogger.error(inspect(e));
 			ctx.status = 401;
 			ctx.body = e.response.data;
 		}
@@ -89,7 +91,7 @@ export function apiMastodonCompatible(router: Router): void {
 				convertAnnouncement(announcement),
 			);
 		} catch (e: any) {
-			console.error(e);
+			apiLogger.error(inspect(e));
 			ctx.status = 401;
 			ctx.body = e.response.data;
 		}
@@ -107,7 +109,7 @@ export function apiMastodonCompatible(router: Router): void {
 				);
 				ctx.body = data.data;
 			} catch (e: any) {
-				console.error(e);
+				apiLogger.error(inspect(e));
 				ctx.status = 401;
 				ctx.body = e.response.data;
 			}
@@ -123,7 +125,7 @@ export function apiMastodonCompatible(router: Router): void {
 			const data = await client.getFilters();
 			ctx.body = data.data.map((filter) => convertFilter(filter));
 		} catch (e: any) {
-			console.error(e);
+			apiLogger.error(inspect(e));
 			ctx.status = 401;
 			ctx.body = e.response.data;
 		}
@@ -138,7 +140,7 @@ export function apiMastodonCompatible(router: Router): void {
 			const data = await client.getInstanceTrends();
 			ctx.body = data.data;
 		} catch (e: any) {
-			console.error(e);
+			apiLogger.error(inspect(e));
 			ctx.status = 401;
 			ctx.body = e.response.data;
 		}
@@ -153,7 +155,7 @@ export function apiMastodonCompatible(router: Router): void {
 			const data = await client.getPreferences();
 			ctx.body = data.data;
 		} catch (e: any) {
-			console.error(e);
+			apiLogger.error(inspect(e));
 			ctx.status = 401;
 			ctx.body = e.response.data;
 		}
diff --git a/packages/backend/src/server/api/mastodon/endpoints/account.ts b/packages/backend/src/server/api/mastodon/endpoints/account.ts
index 76c3af378d..a6f953677c 100644
--- a/packages/backend/src/server/api/mastodon/endpoints/account.ts
+++ b/packages/backend/src/server/api/mastodon/endpoints/account.ts
@@ -9,6 +9,8 @@ import {
 	convertRelationship,
 	convertStatus,
 } from "../converters.js";
+import { apiLogger } from "../../logger.js";
+import { inspect } from "node:util";
 
 const relationshipModel = {
 	id: "",
@@ -52,8 +54,7 @@ export function apiAccountMastodon(router: Router): void {
 			console.log(acct);
 			ctx.body = acct;
 		} catch (e: any) {
-			console.error(e);
-			console.error(e.response.data);
+			apiLogger.error(inspect(e));
 			ctx.status = 401;
 			ctx.body = e.response.data;
 		}
@@ -68,8 +69,7 @@ export function apiAccountMastodon(router: Router): void {
 			);
 			ctx.body = convertAccount(data.data);
 		} catch (e: any) {
-			console.error(e);
-			console.error(e.response.data);
+			apiLogger.error(inspect(e));
 			ctx.status = 401;
 			ctx.body = e.response.data;
 		}
@@ -85,8 +85,7 @@ export function apiAccountMastodon(router: Router): void {
 			);
 			ctx.body = convertAccount(data.data.accounts[0]);
 		} catch (e: any) {
-			console.error(e);
-			console.error(e.response.data);
+			apiLogger.error(inspect(e));
 			ctx.status = 401;
 			ctx.body = e.response.data;
 		}
@@ -119,10 +118,9 @@ export function apiAccountMastodon(router: Router): void {
 				convertRelationship(relationship),
 			);
 		} catch (e: any) {
-			console.error(e);
+			apiLogger.error(inspect(e));
 			let data = e.response.data;
 			data.users = users;
-			console.error(data);
 			ctx.status = 401;
 			ctx.body = data;
 		}
@@ -136,8 +134,7 @@ export function apiAccountMastodon(router: Router): void {
 			const data = await client.getAccount(calcId);
 			ctx.body = convertAccount(data.data);
 		} catch (e: any) {
-			console.error(e);
-			console.error(e.response.data);
+			apiLogger.error(inspect(e));
 			ctx.status = 401;
 			ctx.body = e.response.data;
 		}
@@ -155,8 +152,7 @@ export function apiAccountMastodon(router: Router): void {
 				);
 				ctx.body = data.data.map((status) => convertStatus(status));
 			} catch (e: any) {
-				console.error(e);
-				console.error(e.response.data);
+				apiLogger.error(inspect(e));
 				ctx.status = 401;
 				ctx.body = e.response.data;
 			}
@@ -174,8 +170,7 @@ export function apiAccountMastodon(router: Router): void {
 				);
 				ctx.body = data.data.map((tag) => convertFeaturedTag(tag));
 			} catch (e: any) {
-				console.error(e);
-				console.error(e.response.data);
+				apiLogger.error(inspect(e));
 				ctx.status = 401;
 				ctx.body = e.response.data;
 			}
@@ -194,8 +189,7 @@ export function apiAccountMastodon(router: Router): void {
 				);
 				ctx.body = data.data.map((account) => convertAccount(account));
 			} catch (e: any) {
-				console.error(e);
-				console.error(e.response.data);
+				apiLogger.error(inspect(e));
 				ctx.status = 401;
 				ctx.body = e.response.data;
 			}
@@ -214,8 +208,7 @@ export function apiAccountMastodon(router: Router): void {
 				);
 				ctx.body = data.data.map((account) => convertAccount(account));
 			} catch (e: any) {
-				console.error(e);
-				console.error(e.response.data);
+				apiLogger.error(inspect(e));
 				ctx.status = 401;
 				ctx.body = e.response.data;
 			}
@@ -233,8 +226,7 @@ export function apiAccountMastodon(router: Router): void {
 				);
 				ctx.body = data.data.map((list) => convertList(list));
 			} catch (e: any) {
-				console.error(e);
-				console.error(e.response.data);
+				apiLogger.error(inspect(e));
 				ctx.status = 401;
 				ctx.body = e.response.data;
 			}
@@ -254,8 +246,7 @@ export function apiAccountMastodon(router: Router): void {
 				acct.following = true;
 				ctx.body = acct;
 			} catch (e: any) {
-				console.error(e);
-				console.error(e.response.data);
+				apiLogger.error(inspect(e));
 				ctx.status = 401;
 				ctx.body = e.response.data;
 			}
@@ -275,8 +266,7 @@ export function apiAccountMastodon(router: Router): void {
 				acct.following = false;
 				ctx.body = acct;
 			} catch (e: any) {
-				console.error(e);
-				console.error(e.response.data);
+				apiLogger.error(inspect(e));
 				ctx.status = 401;
 				ctx.body = e.response.data;
 			}
@@ -294,8 +284,7 @@ export function apiAccountMastodon(router: Router): void {
 				);
 				ctx.body = convertRelationship(data.data);
 			} catch (e: any) {
-				console.error(e);
-				console.error(e.response.data);
+				apiLogger.error(inspect(e));
 				ctx.status = 401;
 				ctx.body = e.response.data;
 			}
@@ -313,8 +302,7 @@ export function apiAccountMastodon(router: Router): void {
 				);
 				ctx.body = convertRelationship(data.data);
 			} catch (e: any) {
-				console.error(e);
-				console.error(e.response.data);
+				apiLogger.error(inspect(e));
 				ctx.status = 401;
 				ctx.body = e.response.data;
 			}
@@ -333,8 +321,7 @@ export function apiAccountMastodon(router: Router): void {
 				);
 				ctx.body = convertRelationship(data.data);
 			} catch (e: any) {
-				console.error(e);
-				console.error(e.response.data);
+				apiLogger.error(inspect(e));
 				ctx.status = 401;
 				ctx.body = e.response.data;
 			}
@@ -352,8 +339,7 @@ export function apiAccountMastodon(router: Router): void {
 				);
 				ctx.body = convertRelationship(data.data);
 			} catch (e: any) {
-				console.error(e);
-				console.error(e.response.data);
+				apiLogger.error(inspect(e));
 				ctx.status = 401;
 				ctx.body = e.response.data;
 			}
@@ -367,8 +353,7 @@ export function apiAccountMastodon(router: Router): void {
 			const data = await client.getFeaturedTags();
 			ctx.body = data.data.map((tag) => convertFeaturedTag(tag));
 		} catch (e: any) {
-			console.error(e);
-			console.error(e.response.data);
+			apiLogger.error(inspect(e));
 			ctx.status = 401;
 			ctx.body = e.response.data;
 		}
@@ -381,8 +366,7 @@ export function apiAccountMastodon(router: Router): void {
 			const data = await client.getFollowedTags();
 			ctx.body = data.data;
 		} catch (e: any) {
-			console.error(e);
-			console.error(e.response.data);
+			apiLogger.error(inspect(e));
 			ctx.status = 401;
 			ctx.body = e.response.data;
 		}
@@ -397,8 +381,7 @@ export function apiAccountMastodon(router: Router): void {
 			);
 			ctx.body = data.data.map((status) => convertStatus(status));
 		} catch (e: any) {
-			console.error(e);
-			console.error(e.response.data);
+			apiLogger.error(inspect(e));
 			ctx.status = 401;
 			ctx.body = e.response.data;
 		}
@@ -413,8 +396,7 @@ export function apiAccountMastodon(router: Router): void {
 			);
 			ctx.body = data.data.map((status) => convertStatus(status));
 		} catch (e: any) {
-			console.error(e);
-			console.error(e.response.data);
+			apiLogger.error(inspect(e));
 			ctx.status = 401;
 			ctx.body = e.response.data;
 		}
@@ -429,8 +411,7 @@ export function apiAccountMastodon(router: Router): void {
 			);
 			ctx.body = data.data.map((account) => convertAccount(account));
 		} catch (e: any) {
-			console.error(e);
-			console.error(e.response.data);
+			apiLogger.error(inspect(e));
 			ctx.status = 401;
 			ctx.body = e.response.data;
 		}
@@ -445,8 +426,7 @@ export function apiAccountMastodon(router: Router): void {
 			);
 			ctx.body = data.data.map((account) => convertAccount(account));
 		} catch (e: any) {
-			console.error(e);
-			console.error(e.response.data);
+			apiLogger.error(inspect(e));
 			ctx.status = 401;
 			ctx.body = e.response.data;
 		}
@@ -461,8 +441,7 @@ export function apiAccountMastodon(router: Router): void {
 			);
 			ctx.body = data.data.map((account) => convertAccount(account));
 		} catch (e: any) {
-			console.error(e);
-			console.error(e.response.data);
+			apiLogger.error(inspect(e));
 			ctx.status = 401;
 			ctx.body = e.response.data;
 		}
@@ -479,8 +458,7 @@ export function apiAccountMastodon(router: Router): void {
 				);
 				ctx.body = convertRelationship(data.data);
 			} catch (e: any) {
-				console.error(e);
-				console.error(e.response.data);
+				apiLogger.error(inspect(e));
 				ctx.status = 401;
 				ctx.body = e.response.data;
 			}
@@ -498,8 +476,7 @@ export function apiAccountMastodon(router: Router): void {
 				);
 				ctx.body = convertRelationship(data.data);
 			} catch (e: any) {
-				console.error(e);
-				console.error(e.response.data);
+				apiLogger.error(inspect(e));
 				ctx.status = 401;
 				ctx.body = e.response.data;
 			}
diff --git a/packages/backend/src/server/api/mastodon/endpoints/auth.ts b/packages/backend/src/server/api/mastodon/endpoints/auth.ts
index 3c7ece920a..e65e310b14 100644
--- a/packages/backend/src/server/api/mastodon/endpoints/auth.ts
+++ b/packages/backend/src/server/api/mastodon/endpoints/auth.ts
@@ -1,5 +1,7 @@
 import Router from "@koa/router";
 import { getClient } from "../ApiMastodonCompatibleService.js";
+import { apiLogger } from "@/server/api/logger.js";
+import { inspect } from "node:util";
 
 const readScope = [
 	"read:account",
@@ -70,7 +72,7 @@ export function apiAuthMastodon(router: Router): void {
 			console.log(returns);
 			ctx.body = returns;
 		} catch (e: any) {
-			console.error(e);
+			apiLogger.error(inspect(e));
 			ctx.status = 401;
 			ctx.body = e.response.data;
 		}
diff --git a/packages/backend/src/server/api/mastodon/endpoints/filter.ts b/packages/backend/src/server/api/mastodon/endpoints/filter.ts
index 6524fd2f6e..30fb1e1eab 100644
--- a/packages/backend/src/server/api/mastodon/endpoints/filter.ts
+++ b/packages/backend/src/server/api/mastodon/endpoints/filter.ts
@@ -2,6 +2,8 @@ import Router from "@koa/router";
 import { getClient } from "../ApiMastodonCompatibleService.js";
 import { IdType, convertId } from "@/server/api/index.js";
 import { convertFilter } from "../converters.js";
+import { apiLogger } from "@/server/api/logger.js";
+import { inspect } from "node:util";
 
 export function apiFilterMastodon(router: Router): void {
 	router.get("/v1/filters", async (ctx) => {
@@ -13,7 +15,7 @@ export function apiFilterMastodon(router: Router): void {
 			const data = await client.getFilters();
 			ctx.body = data.data.map((filter) => convertFilter(filter));
 		} catch (e: any) {
-			console.error(e);
+			apiLogger.error(inspect(e));
 			ctx.status = 401;
 			ctx.body = e.response.data;
 		}
@@ -30,7 +32,7 @@ export function apiFilterMastodon(router: Router): void {
 			);
 			ctx.body = convertFilter(data.data);
 		} catch (e: any) {
-			console.error(e);
+			apiLogger.error(inspect(e));
 			ctx.status = 401;
 			ctx.body = e.response.data;
 		}
@@ -45,7 +47,7 @@ export function apiFilterMastodon(router: Router): void {
 			const data = await client.createFilter(body.phrase, body.context, body);
 			ctx.body = convertFilter(data.data);
 		} catch (e: any) {
-			console.error(e);
+			apiLogger.error(inspect(e));
 			ctx.status = 401;
 			ctx.body = e.response.data;
 		}
@@ -64,7 +66,7 @@ export function apiFilterMastodon(router: Router): void {
 			);
 			ctx.body = convertFilter(data.data);
 		} catch (e: any) {
-			console.error(e);
+			apiLogger.error(inspect(e));
 			ctx.status = 401;
 			ctx.body = e.response.data;
 		}
@@ -81,7 +83,7 @@ export function apiFilterMastodon(router: Router): void {
 			);
 			ctx.body = data.data;
 		} catch (e: any) {
-			console.error(e);
+			apiLogger.error(inspect(e));
 			ctx.status = 401;
 			ctx.body = e.response.data;
 		}
diff --git a/packages/backend/src/server/api/mastodon/endpoints/notifications.ts b/packages/backend/src/server/api/mastodon/endpoints/notifications.ts
index 9628eccdde..3df740a91e 100644
--- a/packages/backend/src/server/api/mastodon/endpoints/notifications.ts
+++ b/packages/backend/src/server/api/mastodon/endpoints/notifications.ts
@@ -3,6 +3,9 @@ import { convertId, IdType } from "@/server/api/index.js";
 import { getClient } from "../ApiMastodonCompatibleService.js";
 import { convertTimelinesArgsId } from "./timeline.js";
 import { convertNotification } from "../converters.js";
+import { apiLogger } from "@/server/api/logger.js";
+import { inspect } from "node:util";
+
 function toLimitToInt(q: any) {
 	if (q.limit) if (typeof q.limit === "string") q.limit = parseInt(q.limit, 10);
 	return q;
@@ -30,7 +33,7 @@ export function apiNotificationsMastodon(router: Router): void {
 			});
 			ctx.body = ret;
 		} catch (e: any) {
-			console.error(e);
+			apiLogger.error(inspect(e));
 			ctx.status = 401;
 			ctx.body = e.response.data;
 		}
@@ -55,7 +58,7 @@ export function apiNotificationsMastodon(router: Router): void {
 				data.type = "favourite";
 			}
 		} catch (e: any) {
-			console.error(e);
+			apiLogger.error(inspect(e));
 			ctx.status = 401;
 			ctx.body = e.response.data;
 		}
@@ -70,7 +73,7 @@ export function apiNotificationsMastodon(router: Router): void {
 			const data = await client.dismissNotifications();
 			ctx.body = data.data;
 		} catch (e: any) {
-			console.error(e);
+			apiLogger.error(inspect(e));
 			ctx.status = 401;
 			ctx.body = e.response.data;
 		}
@@ -87,7 +90,7 @@ export function apiNotificationsMastodon(router: Router): void {
 			);
 			ctx.body = data.data;
 		} catch (e: any) {
-			console.error(e);
+			apiLogger.error(inspect(e));
 			ctx.status = 401;
 			ctx.body = e.response.data;
 		}
diff --git a/packages/backend/src/server/api/mastodon/endpoints/search.ts b/packages/backend/src/server/api/mastodon/endpoints/search.ts
index c9bbab0a4f..533a1f5e1c 100644
--- a/packages/backend/src/server/api/mastodon/endpoints/search.ts
+++ b/packages/backend/src/server/api/mastodon/endpoints/search.ts
@@ -4,6 +4,8 @@ import axios from "axios";
 import { Converter } from "megalodon";
 import { convertTimelinesArgsId, limitToInt } from "./timeline.js";
 import { convertAccount, convertStatus } from "../converters.js";
+import { apiLogger } from "@/server/api/logger.js";
+import { inspect } from "node:util";
 
 export function apiSearchMastodon(router: Router): void {
 	router.get("/v1/search", async (ctx) => {
@@ -17,7 +19,7 @@ export function apiSearchMastodon(router: Router): void {
 			const data = await client.search(query.q, type, query);
 			ctx.body = data.data;
 		} catch (e: any) {
-			console.error(e);
+			apiLogger.error(inspect(e));
 			ctx.status = 401;
 			ctx.body = e.response.data;
 		}
@@ -50,7 +52,7 @@ export function apiSearchMastodon(router: Router): void {
 				hashtags: tags?.data?.hashtags ?? [],
 			};
 		} catch (e: any) {
-			console.error(e);
+			apiLogger.error(inspect(e));
 			ctx.status = 401;
 			ctx.body = e.response.data;
 		}
@@ -66,7 +68,7 @@ export function apiSearchMastodon(router: Router): void {
 			);
 			ctx.body = data.map((status) => convertStatus(status));
 		} catch (e: any) {
-			console.error(e);
+			apiLogger.error(inspect(e));
 			ctx.status = 401;
 			ctx.body = e.response.data;
 		}
@@ -89,7 +91,7 @@ export function apiSearchMastodon(router: Router): void {
 			console.log(data);
 			ctx.body = data;
 		} catch (e: any) {
-			console.error(e);
+			apiLogger.error(inspect(e));
 			ctx.status = 401;
 			ctx.body = e.response.data;
 		}
@@ -109,8 +111,7 @@ async function getHighlight(
 		const data: MisskeyEntity.Note[] = api.data;
 		return data.map((note) => new Converter(BASE_URL).note(note, domain));
 	} catch (e: any) {
-		console.log(e);
-		console.log(e.response.data);
+		apiLogger.info(inspect(e));
 		return [];
 	}
 }
@@ -131,7 +132,7 @@ async function getFeaturedUser(
 			state: "alive",
 		});
 		const data: MisskeyEntity.UserDetail[] = api.data;
-		console.log(data);
+		apiLogger.info(inspect(data));
 		return data.map((u) => {
 			return {
 				source: "past_interactions",
@@ -139,8 +140,7 @@ async function getFeaturedUser(
 			};
 		});
 	} catch (e: any) {
-		console.log(e);
-		console.log(e.response.data);
+		apiLogger.info(inspect(e));
 		return [];
 	}
 }
diff --git a/packages/backend/src/server/api/mastodon/endpoints/status.ts b/packages/backend/src/server/api/mastodon/endpoints/status.ts
index ac1cbe602d..33201d9edf 100644
--- a/packages/backend/src/server/api/mastodon/endpoints/status.ts
+++ b/packages/backend/src/server/api/mastodon/endpoints/status.ts
@@ -12,6 +12,8 @@ import {
 	convertStatus,
 } from "../converters.js";
 import { fetchMeta } from "@/misc/fetch-meta.js";
+import { apiLogger } from "@/server/api/logger.js";
+import { inspect } from "node:util";
 
 function normalizeQuery(data: any) {
 	const str = querystring.stringify(data);
@@ -54,7 +56,7 @@ export function apiStatusMastodon(router: Router): void {
 					const data = await client.deleteEmojiReaction(id, react);
 					ctx.body = data.data;
 				} catch (e: any) {
-					console.error(e);
+					apiLogger.error(inspect(e));
 					ctx.status = 401;
 					ctx.body = e.response.data;
 				}
@@ -91,7 +93,7 @@ export function apiStatusMastodon(router: Router): void {
 			const data = await client.postStatus(text, body);
 			ctx.body = convertStatus(data.data);
 		} catch (e: any) {
-			console.error(e);
+			apiLogger.error(inspect(e));
 			ctx.status = 401;
 			ctx.body = e.response.data;
 		}
@@ -106,7 +108,7 @@ export function apiStatusMastodon(router: Router): void {
 			);
 			ctx.body = convertStatus(data.data);
 		} catch (e: any) {
-			console.error(e);
+			apiLogger.error(inspect(e));
 			ctx.status = ctx.status == 404 ? 404 : 401;
 			ctx.body = e.response.data;
 		}
@@ -121,7 +123,7 @@ export function apiStatusMastodon(router: Router): void {
 			);
 			ctx.body = data.data;
 		} catch (e: any) {
-			console.error(e.response.data, request.params.id);
+			apiLogger.error(inspect(e));
 			ctx.status = 401;
 			ctx.body = e.response.data;
 		}
@@ -153,7 +155,7 @@ export function apiStatusMastodon(router: Router): void {
 				);
 				ctx.body = data.data;
 			} catch (e: any) {
-				console.error(e);
+				apiLogger.error(inspect(e));
 				ctx.status = 401;
 				ctx.body = e.response.data;
 			}
@@ -171,7 +173,7 @@ export function apiStatusMastodon(router: Router): void {
 				);
 				ctx.body = data.data.map((account) => convertAccount(account));
 			} catch (e: any) {
-				console.error(e);
+				apiLogger.error(inspect(e));
 				ctx.status = 401;
 				ctx.body = e.response.data;
 			}
@@ -189,7 +191,7 @@ export function apiStatusMastodon(router: Router): void {
 				);
 				ctx.body = data.data.map((account) => convertAccount(account));
 			} catch (e: any) {
-				console.error(e);
+				apiLogger.error(inspect(e));
 				ctx.status = 401;
 				ctx.body = e.response.data;
 			}
@@ -207,7 +209,7 @@ export function apiStatusMastodon(router: Router): void {
 				);
 				ctx.body = data.data.map((account) => convertAccount(account));
 			} catch (e: any) {
-				console.error(e);
+				apiLogger.error(inspect(e));
 				ctx.status = 401;
 				ctx.body = e.response.data;
 			}
@@ -229,8 +231,7 @@ export function apiStatusMastodon(router: Router): void {
 				//const data = await client.favouriteStatus(ctx.params.id) as any;
 				ctx.body = convertStatus(a.data);
 			} catch (e: any) {
-				console.error(e);
-				console.error(e.response.data);
+				apiLogger.error(inspect(e));
 				ctx.status = 401;
 				ctx.body = e.response.data;
 			}
@@ -251,7 +252,7 @@ export function apiStatusMastodon(router: Router): void {
 				);
 				ctx.body = convertStatus(data.data);
 			} catch (e: any) {
-				console.error(e);
+				apiLogger.error(inspect(e));
 				ctx.status = 401;
 				ctx.body = e.response.data;
 			}
@@ -270,7 +271,7 @@ export function apiStatusMastodon(router: Router): void {
 				);
 				ctx.body = convertStatus(data.data);
 			} catch (e: any) {
-				console.error(e);
+				apiLogger.error(inspect(e));
 				ctx.status = 401;
 				ctx.body = e.response.data;
 			}
@@ -289,7 +290,7 @@ export function apiStatusMastodon(router: Router): void {
 				);
 				ctx.body = convertStatus(data.data);
 			} catch (e: any) {
-				console.error(e);
+				apiLogger.error(inspect(e));
 				ctx.status = 401;
 				ctx.body = e.response.data;
 			}
@@ -308,7 +309,7 @@ export function apiStatusMastodon(router: Router): void {
 				);
 				ctx.body = convertStatus(data.data);
 			} catch (e: any) {
-				console.error(e);
+				apiLogger.error(inspect(e));
 				ctx.status = 401;
 				ctx.body = e.response.data;
 			}
@@ -327,7 +328,7 @@ export function apiStatusMastodon(router: Router): void {
 				);
 				ctx.body = convertStatus(data.data);
 			} catch (e: any) {
-				console.error(e);
+				apiLogger.error(inspect(e));
 				ctx.status = 401;
 				ctx.body = e.response.data;
 			}
@@ -346,7 +347,7 @@ export function apiStatusMastodon(router: Router): void {
 				);
 				ctx.body = convertStatus(data.data);
 			} catch (e: any) {
-				console.error(e);
+				apiLogger.error(inspect(e));
 				ctx.status = 401;
 				ctx.body = e.response.data;
 			}
@@ -365,7 +366,7 @@ export function apiStatusMastodon(router: Router): void {
 				);
 				ctx.body = convertStatus(data.data);
 			} catch (e: any) {
-				console.error(e);
+				apiLogger.error(inspect(e));
 				ctx.status = 401;
 				ctx.body = e.response.data;
 			}
@@ -385,7 +386,7 @@ export function apiStatusMastodon(router: Router): void {
 				);
 				ctx.body = convertStatus(data.data);
 			} catch (e: any) {
-				console.error(e);
+				apiLogger.error(inspect(e));
 				ctx.status = 401;
 				ctx.body = e.response.data;
 			}
@@ -405,7 +406,7 @@ export function apiStatusMastodon(router: Router): void {
 				);
 				ctx.body = convertStatus(data.data);
 			} catch (e: any) {
-				console.error(e);
+				apiLogger.error(inspect(e));
 				ctx.status = 401;
 				ctx.body = e.response.data;
 			}
@@ -422,7 +423,7 @@ export function apiStatusMastodon(router: Router): void {
 			);
 			ctx.body = convertAttachment(data.data);
 		} catch (e: any) {
-			console.error(e);
+			apiLogger.error(inspect(e));
 			ctx.status = 401;
 			ctx.body = e.response.data;
 		}
@@ -438,7 +439,7 @@ export function apiStatusMastodon(router: Router): void {
 			);
 			ctx.body = convertAttachment(data.data);
 		} catch (e: any) {
-			console.error(e);
+			apiLogger.error(inspect(e));
 			ctx.status = 401;
 			ctx.body = e.response.data;
 		}
@@ -453,7 +454,7 @@ export function apiStatusMastodon(router: Router): void {
 			);
 			ctx.body = convertPoll(data.data);
 		} catch (e: any) {
-			console.error(e);
+			apiLogger.error(inspect(e));
 			ctx.status = 401;
 			ctx.body = e.response.data;
 		}
@@ -471,7 +472,7 @@ export function apiStatusMastodon(router: Router): void {
 				);
 				ctx.body = convertPoll(data.data);
 			} catch (e: any) {
-				console.error(e);
+				apiLogger.error(inspect(e));
 				ctx.status = 401;
 				ctx.body = e.response.data;
 			}
diff --git a/packages/backend/src/server/api/mastodon/endpoints/timeline.ts b/packages/backend/src/server/api/mastodon/endpoints/timeline.ts
index 05741c4cef..9d29ef3f7a 100644
--- a/packages/backend/src/server/api/mastodon/endpoints/timeline.ts
+++ b/packages/backend/src/server/api/mastodon/endpoints/timeline.ts
@@ -8,6 +8,8 @@ import {
 	convertStatus,
 } from "../converters.js";
 import { convertId, IdType } from "@/server/api/index.js";
+import { apiLogger } from "@/server/api/logger.js";
+import { inspect } from "node:util";
 
 export function limitToInt(q: ParsedUrlQuery) {
 	let object: any = q;
@@ -71,8 +73,7 @@ export function apiTimelineMastodon(router: Router): void {
 					  );
 			ctx.body = data.data.map((status) => convertStatus(status));
 		} catch (e: any) {
-			console.error(e);
-			console.error(e.response.data);
+			apiLogger.error(inspect(e));
 			ctx.status = 401;
 			ctx.body = e.response.data;
 		}
@@ -90,8 +91,7 @@ export function apiTimelineMastodon(router: Router): void {
 				);
 				ctx.body = data.data.map((status) => convertStatus(status));
 			} catch (e: any) {
-				console.error(e);
-				console.error(e.response.data);
+				apiLogger.error(inspect(e));
 				ctx.status = 401;
 				ctx.body = e.response.data;
 			}
@@ -107,8 +107,7 @@ export function apiTimelineMastodon(router: Router): void {
 			);
 			ctx.body = data.data.map((status) => convertStatus(status));
 		} catch (e: any) {
-			console.error(e);
-			console.error(e.response.data);
+			apiLogger.error(inspect(e));
 			ctx.status = 401;
 			ctx.body = e.response.data;
 		}
@@ -126,8 +125,7 @@ export function apiTimelineMastodon(router: Router): void {
 				);
 				ctx.body = data.data.map((status) => convertStatus(status));
 			} catch (e: any) {
-				console.error(e);
-				console.error(e.response.data);
+				apiLogger.error(inspect(e));
 				ctx.status = 401;
 				ctx.body = e.response.data;
 			}
@@ -145,8 +143,7 @@ export function apiTimelineMastodon(router: Router): void {
 				convertConversation(conversation),
 			);
 		} catch (e: any) {
-			console.error(e);
-			console.error(e.response.data);
+			apiLogger.error(inspect(e));
 			ctx.status = 401;
 			ctx.body = e.response.data;
 		}
@@ -159,8 +156,7 @@ export function apiTimelineMastodon(router: Router): void {
 			const data = await client.getLists();
 			ctx.body = data.data.map((list) => convertList(list));
 		} catch (e: any) {
-			console.error(e);
-			console.error(e.response.data);
+			apiLogger.error(inspect(e));
 			ctx.status = 401;
 			ctx.body = e.response.data;
 		}
@@ -177,8 +173,7 @@ export function apiTimelineMastodon(router: Router): void {
 				);
 				ctx.body = convertList(data.data);
 			} catch (e: any) {
-				console.error(e);
-				console.error(e.response.data);
+				apiLogger.error(inspect(e));
 				ctx.status = 401;
 				ctx.body = e.response.data;
 			}
@@ -192,8 +187,7 @@ export function apiTimelineMastodon(router: Router): void {
 			const data = await client.createList((ctx.request.body as any).title);
 			ctx.body = convertList(data.data);
 		} catch (e: any) {
-			console.error(e);
-			console.error(e.response.data);
+			apiLogger.error(inspect(e));
 			ctx.status = 401;
 			ctx.body = e.response.data;
 		}
@@ -211,8 +205,7 @@ export function apiTimelineMastodon(router: Router): void {
 				);
 				ctx.body = convertList(data.data);
 			} catch (e: any) {
-				console.error(e);
-				console.error(e.response.data);
+				apiLogger.error(inspect(e));
 				ctx.status = 401;
 				ctx.body = e.response.data;
 			}
@@ -230,8 +223,7 @@ export function apiTimelineMastodon(router: Router): void {
 				);
 				ctx.body = data.data;
 			} catch (e: any) {
-				console.error(e);
-				console.error(e.response.data);
+				apiLogger.error(inspect(e));
 				ctx.status = 401;
 				ctx.body = e.response.data;
 			}
@@ -250,8 +242,7 @@ export function apiTimelineMastodon(router: Router): void {
 				);
 				ctx.body = data.data.map((account) => convertAccount(account));
 			} catch (e: any) {
-				console.error(e);
-				console.error(e.response.data);
+				apiLogger.error(inspect(e));
 				ctx.status = 401;
 				ctx.body = e.response.data;
 			}
@@ -272,8 +263,7 @@ export function apiTimelineMastodon(router: Router): void {
 				);
 				ctx.body = data.data;
 			} catch (e: any) {
-				console.error(e);
-				console.error(e.response.data);
+				apiLogger.error(inspect(e));
 				ctx.status = 401;
 				ctx.body = e.response.data;
 			}
@@ -294,8 +284,7 @@ export function apiTimelineMastodon(router: Router): void {
 				);
 				ctx.body = data.data;
 			} catch (e: any) {
-				console.error(e);
-				console.error(e.response.data);
+				apiLogger.error(inspect(e));
 				ctx.status = 401;
 				ctx.body = e.response.data;
 			}
diff --git a/packages/backend/src/server/api/private/signup.ts b/packages/backend/src/server/api/private/signup.ts
index d60e5a1910..ba6d23d28f 100644
--- a/packages/backend/src/server/api/private/signup.ts
+++ b/packages/backend/src/server/api/private/signup.ts
@@ -9,6 +9,7 @@ import { sendEmail } from "@/services/send-email.js";
 import { genId } from "@/misc/gen-id.js";
 import { validateEmailForAccount } from "@/services/validate-email-for-account.js";
 import { hashPassword } from "@/misc/password.js";
+import { inspect } from "node:util";
 
 export default async (ctx: Koa.Context) => {
 	const body = ctx.request.body;
diff --git a/packages/backend/src/server/api/stream/index.ts b/packages/backend/src/server/api/stream/index.ts
index 86408a03d0..071bcb8da1 100644
--- a/packages/backend/src/server/api/stream/index.ts
+++ b/packages/backend/src/server/api/stream/index.ts
@@ -27,6 +27,8 @@ import type Channel from "./channel.js";
 import type { StreamEventEmitter, StreamMessages } from "./types.js";
 import { Converter } from "megalodon";
 import { getClient } from "@/server/api/mastodon/ApiMastodonCompatibleService.js";
+import { apiLogger } from "@/server/api/logger.js";
+import { inspect } from "node:util";
 
 /**
  * Main stream connection
@@ -183,7 +185,7 @@ export default class Connection {
 						const tl = await client.getHomeTimeline();
 						for (const t of tl.data) forSubscribe.push(t.id);
 					} catch (e: any) {
-						console.error(e);
+						apiLogger.error(inspect(e));
 					}
 				} else if (simpleObj.stream === "public:local") {
 					this.currentSubscribe.push(["public:local"]);
diff --git a/packages/backend/src/server/file/send-drive-file.ts b/packages/backend/src/server/file/send-drive-file.ts
index 090ea35027..e7aaf78dcb 100644
--- a/packages/backend/src/server/file/send-drive-file.ts
+++ b/packages/backend/src/server/file/send-drive-file.ts
@@ -16,6 +16,7 @@ import { GenerateVideoThumbnail } from "@/services/drive/generate-video-thumbnai
 import { StatusError } from "@/misc/fetch.js";
 import { ByteRangeReadable } from "./byte-range-readable.js";
 import { FILE_TYPE_BROWSERSAFE } from "@/const.js";
+import { inspect } from "node:util";
 
 const _filename = fileURLToPath(import.meta.url);
 const _dirname = dirname(_filename);
@@ -106,7 +107,7 @@ export default async function (ctx: Koa.Context) {
 				);
 				ctx.set("Cache-Control", "max-age=31536000, immutable");
 			} catch (e) {
-				serverLogger.error(`${e}`);
+				serverLogger.error(`${inspect(e)}`);
 
 				if (e instanceof StatusError && e.isClientError) {
 					ctx.status = e.statusCode;
diff --git a/packages/backend/src/server/index.ts b/packages/backend/src/server/index.ts
index 3a9f62f337..00ad0baef9 100644
--- a/packages/backend/src/server/index.ts
+++ b/packages/backend/src/server/index.ts
@@ -33,6 +33,7 @@ import { initializeStreamingServer } from "./api/streaming.js";
 import { koaBody } from "koa-body";
 import removeTrailingSlash from "koa-remove-trailing-slashes";
 import { v4 as uuid } from "uuid";
+import { inspect } from "node:util";
 
 export const serverLogger = new Logger("server", "gray", false);
 
@@ -194,10 +195,10 @@ mastoRouter.post("/oauth/token", async (ctx) => {
 			scope: body.scope || "read write follow push",
 			created_at: Math.floor(new Date().getTime() / 1000),
 		};
-		console.log("token-response", ret);
+		serverLogger.info("token-response", ret);
 		ctx.body = ret;
 	} catch (err: any) {
-		console.error(err);
+		serverLogger.error(inspect(err));
 		ctx.status = 401;
 		ctx.body = err.response.data;
 	}
diff --git a/packages/backend/src/server/proxy/proxy-media.ts b/packages/backend/src/server/proxy/proxy-media.ts
index ed607daa0e..a505d74a0f 100644
--- a/packages/backend/src/server/proxy/proxy-media.ts
+++ b/packages/backend/src/server/proxy/proxy-media.ts
@@ -12,6 +12,7 @@ import { StatusError } from "@/misc/fetch.js";
 import { FILE_TYPE_BROWSERSAFE } from "@/const.js";
 import { serverLogger } from "../index.js";
 import { isMimeImage } from "@/misc/is-mime-image.js";
+import { inspect } from "node:util";
 
 export async function proxyMedia(ctx: Koa.Context) {
 	let url = "url" in ctx.query ? ctx.query.url : `https://${ctx.params.url}`;
@@ -130,7 +131,7 @@ export async function proxyMedia(ctx: Koa.Context) {
 		ctx.set("Cache-Control", "max-age=31536000, immutable");
 		ctx.body = image.data;
 	} catch (e) {
-		serverLogger.error(`${e}`);
+		serverLogger.error(`${inspect(e)}`);
 
 		if (e instanceof StatusError && (e.statusCode === 302 || e.isClientError)) {
 			ctx.status = e.statusCode;
diff --git a/packages/backend/src/server/web/url-preview.ts b/packages/backend/src/server/web/url-preview.ts
index c9f3b6cac9..9b32cabab1 100644
--- a/packages/backend/src/server/web/url-preview.ts
+++ b/packages/backend/src/server/web/url-preview.ts
@@ -5,6 +5,7 @@ import Logger from "@/services/logger.js";
 import config from "@/config/index.js";
 import { query } from "@/prelude/url.js";
 import { getJson } from "@/misc/fetch.js";
+import { inspect } from "node:util";
 
 const logger = new Logger("url-preview");
 
@@ -69,7 +70,7 @@ export const urlPreviewHandler = async (ctx: Koa.Context) => {
 
 		ctx.body = summary;
 	} catch (err) {
-		logger.warn(`Failed to get preview of ${url}: ${err}`);
+		logger.warn(`Failed to get preview of ${url}:\n${inspect(err)}`);
 		ctx.status = 200;
 		ctx.set("Cache-Control", "max-age=86400, immutable");
 		ctx.body = "{}";
diff --git a/packages/backend/src/services/drive/add-file.ts b/packages/backend/src/services/drive/add-file.ts
index b9a66bcd26..73869f1d44 100644
--- a/packages/backend/src/services/drive/add-file.ts
+++ b/packages/backend/src/services/drive/add-file.ts
@@ -33,6 +33,7 @@ import { convertSharpToWebp } from "./image-processor.js";
 import { driveLogger } from "./logger.js";
 import { GenerateVideoThumbnail } from "./generate-video-thumbnail.js";
 import { deleteFile } from "./delete-file.js";
+import { inspect } from "node:util";
 
 const logger = driveLogger.createSubLogger("register", "yellow");
 
@@ -234,7 +235,7 @@ export async function generateAlts(
 				thumbnail,
 			};
 		} catch (err) {
-			logger.warn(`GenerateVideoThumbnail failed: ${err}`);
+			logger.warn(`GenerateVideoThumbnail failed:\n${inspect(err)}`);
 			return {
 				webpublic: null,
 				thumbnail: null,
@@ -289,7 +290,7 @@ export async function generateAlts(
 			metadata.height <= 2048
 		);
 	} catch (err) {
-		logger.warn(`sharp failed: ${err}`);
+		logger.warn(`sharp failed:\n${inspect(err)}`);
 		return {
 			webpublic: null,
 			thumbnail: null,
@@ -315,7 +316,7 @@ export async function generateAlts(
 				logger.debug("web image not created (not an required image)");
 			}
 		} catch (err) {
-			logger.warn("web image not created (an error occured)", err as Error);
+			logger.warn(`web image not created (an error occured):\n${inspect(err)}`);
 		}
 	} else {
 		if (satisfyWebpublic)
@@ -342,7 +343,7 @@ export async function generateAlts(
 			logger.debug("thumbnail not created (not an required file)");
 		}
 	} catch (err) {
-		logger.warn("thumbnail not created (an error occured)", err as Error);
+		logger.warn(`thumbnail not created (an error occured):\n${inspect(err)}`);
 	}
 	// #endregion thumbnail
 
@@ -629,7 +630,7 @@ export async function addFile({
 					userId: user ? user.id : IsNull(),
 				})) as DriveFile;
 			} else {
-				logger.error(err as Error);
+				logger.error(inspect(err));
 				throw err;
 			}
 		}
diff --git a/packages/backend/src/services/drive/s3.ts b/packages/backend/src/services/drive/s3.ts
index d01f89cbbf..8886309222 100644
--- a/packages/backend/src/services/drive/s3.ts
+++ b/packages/backend/src/services/drive/s3.ts
@@ -2,6 +2,7 @@ import { URL } from "node:url";
 import S3 from "aws-sdk/clients/s3.js"; // TODO: migrate to SDK v3
 import type { Meta } from "@/models/entities/meta.js";
 import { getAgentByUrl } from "@/misc/fetch.js";
+import { inspect } from "node:util";
 
 export function getS3(meta: Meta) {
 	const u =
@@ -27,7 +28,7 @@ export function getS3(meta: Meta) {
 		});
 	} catch (e) {
 		throw new Error(
-			`Failed to construct S3 client, assembled S3 URL: ${u}\n${e}`,
+			`Failed to construct S3 client, assembled S3 URL: ${u}\n${inspect(e)}`,
 		);
 	}
 }
diff --git a/packages/backend/src/services/drive/upload-from-url.ts b/packages/backend/src/services/drive/upload-from-url.ts
index adbeee5a82..551d3757ca 100644
--- a/packages/backend/src/services/drive/upload-from-url.ts
+++ b/packages/backend/src/services/drive/upload-from-url.ts
@@ -7,6 +7,7 @@ import type { DriveFile } from "@/models/entities/drive-file.js";
 import { DriveFiles } from "@/models/index.js";
 import { driveLogger } from "./logger.js";
 import { addFile } from "./add-file.js";
+import { inspect } from "node:util";
 
 const logger = driveLogger.createSubLogger("downloader");
 
@@ -78,10 +79,7 @@ export async function uploadFromUrl({
 		logger.succ(`Got: ${driveFile.id}`);
 		return driveFile!;
 	} catch (e) {
-		logger.error(`Failed to create drive file: ${e}`, {
-			url: url,
-			e: e,
-		});
+		logger.error(`Failed to create drive file:\n${inspect(e)}`);
 		throw e;
 	} finally {
 		cleanup();
diff --git a/packages/backend/src/services/fetch-instance-metadata.ts b/packages/backend/src/services/fetch-instance-metadata.ts
index a4cc33bca5..6795db0690 100644
--- a/packages/backend/src/services/fetch-instance-metadata.ts
+++ b/packages/backend/src/services/fetch-instance-metadata.ts
@@ -7,6 +7,7 @@ import type { Instance } from "@/models/entities/instance.js";
 import { Instances } from "@/models/index.js";
 import { getFetchInstanceMetadataLock } from "@/misc/app-lock.js";
 import Logger from "@/services/logger.js";
+import { inspect } from "node:util";
 
 const logger = new Logger("metadata", "cyan");
 
@@ -77,7 +78,9 @@ export async function fetchInstanceMetadata(
 
 		logger.succ(`Successfuly updated metadata of ${instance.host}`);
 	} catch (e) {
-		logger.error(`Failed to update metadata of ${instance.host}: ${e}`);
+		logger.error(
+			`Failed to update metadata of ${instance.host}:\n${inspect(e)}`,
+		);
 	} finally {
 		await lock.release();
 	}
@@ -111,7 +114,7 @@ async function fetchNodeinfo(instance: Instance): Promise<NodeInfo> {
 			if (e.statusCode === 404) {
 				throw new Error("No nodeinfo provided");
 			} else {
-				throw new Error(e.statusCode || e.message);
+				throw new Error(inspect(e));
 			}
 		})) as Record<string, unknown>;
 
@@ -137,14 +140,16 @@ async function fetchNodeinfo(instance: Instance): Promise<NodeInfo> {
 		}
 
 		const info = await getJson(link.href).catch((e) => {
-			throw new Error(e.statusCode || e.message);
+			throw new Error(inspect(e));
 		});
 
 		logger.succ(`Successfuly fetched nodeinfo of ${instance.host}`);
 
 		return info as NodeInfo;
 	} catch (e) {
-		logger.error(`Failed to fetch nodeinfo of ${instance.host}: ${e.message}`);
+		logger.error(
+			`Failed to fetch nodeinfo of ${instance.host}:\n${inspect(e)}`,
+		);
 
 		throw e;
 	}
diff --git a/packages/backend/src/services/note/create.ts b/packages/backend/src/services/note/create.ts
index 6edf5f2ec2..16fab4b689 100644
--- a/packages/backend/src/services/note/create.ts
+++ b/packages/backend/src/services/note/create.ts
@@ -68,6 +68,10 @@ import meilisearch from "@/db/meilisearch.js";
 import { redisClient } from "@/db/redis.js";
 import { Mutex } from "redis-semaphore";
 import { langmap } from "@/misc/langmap.js";
+import Logger from "@/services/logger.js";
+import { inspect } from "node:util";
+
+const logger = new Logger("create-note");
 
 const mutedWordsCache = new Cache<
 	{ userId: UserProfile["userId"]; mutedWords: UserProfile["mutedWords"] }[]
@@ -814,7 +818,7 @@ async function insertNote(
 			throw err;
 		}
 
-		console.error(e);
+		logger.error(inspect(e));
 
 		throw e;
 	}
diff --git a/packages/backend/src/services/send-email.ts b/packages/backend/src/services/send-email.ts
index ccc6b365d9..fcc93c79fb 100644
--- a/packages/backend/src/services/send-email.ts
+++ b/packages/backend/src/services/send-email.ts
@@ -2,6 +2,7 @@ import * as nodemailer from "nodemailer";
 import { fetchMeta } from "@/misc/fetch-meta.js";
 import Logger from "@/services/logger.js";
 import config from "@/config/index.js";
+import { inspect } from "node:util";
 
 export const logger = new Logger("email");
 
@@ -67,7 +68,7 @@ export async function sendEmail(
 
 		logger.info(`Message sent: ${info.messageId}`);
 	} catch (err) {
-		logger.error(err as Error);
+		logger.error(inspect(err));
 		throw err;
 	}
 }
diff --git a/packages/client/src/components/MkVisibilityPicker.vue b/packages/client/src/components/MkVisibilityPicker.vue
index 7f7eac52c4..16746d7376 100644
--- a/packages/client/src/components/MkVisibilityPicker.vue
+++ b/packages/client/src/components/MkVisibilityPicker.vue
@@ -95,9 +95,7 @@
 					<i :class="icon('ph-eye-slash')"></i>
 				</div>
 				<div :class="$style.body">
-					<span :class="$style.itemTitle">{{
-						i18n.ts.private
-					}}</span>
+					<span :class="$style.itemTitle">{{ i18n.ts.private }}</span>
 					<span :class="$style.itemDescription">{{
 						i18n.ts.privateDescription
 					}}</span>