diff --git a/packages/backend/src/services/logger.ts b/packages/backend/src/services/logger.ts
index e53279e31c..3fcf28671e 100644
--- a/packages/backend/src/services/logger.ts
+++ b/packages/backend/src/services/logger.ts
@@ -144,12 +144,12 @@ export default class Logger {
 		}
 	}
 
+	// Used when the process can't continue (fatal error)
 	public error(
 		x: string | Error,
 		data?: Record<string, any> | null,
 		important = false,
 	): void {
-		// 実行を継続できない状況で使う
 		if (x instanceof Error) {
 			data = data || {};
 			data.e = x;
@@ -166,30 +166,30 @@ export default class Logger {
 		}
 	}
 
+	// Used when the process can continue but some action should be taken
 	public warn(
 		message: string,
 		data?: Record<string, any> | null,
 		important = false,
 	): void {
-		// 実行を継続できるが改善すべき状況で使う
 		this.log("warning", message, data, important);
 	}
 
+	// Used when something is successful
 	public succ(
 		message: string,
 		data?: Record<string, any> | null,
 		important = false,
 	): void {
-		// 何かに成功した状況で使う
 		this.log("success", message, data, important);
 	}
 
+	// Used for debugging (information necessary for developers but unnecessary for users)
 	public debug(
 		message: string,
 		data?: Record<string, any> | null,
 		important = false,
 	): void {
-		// Used for debugging (information necessary for developers but unnecessary for users)
 		// Fixed if statement is ignored when logLevel includes debug
 		if (
 			config.logLevel?.includes("debug") ||
@@ -200,12 +200,12 @@ export default class Logger {
 		}
 	}
 
+	// Other generic logs
 	public info(
 		message: string,
 		data?: Record<string, any> | null,
 		important = false,
 	): void {
-		// それ以外
 		this.log("info", message, data, important);
 	}
 }