diff --git a/packages/backend/src/core/chart/ChartManagementService.ts b/packages/backend/src/core/chart/ChartManagementService.ts
index 79681370a1..316feec6ee 100644
--- a/packages/backend/src/core/chart/ChartManagementService.ts
+++ b/packages/backend/src/core/chart/ChartManagementService.ts
@@ -6,6 +6,8 @@
 import { Injectable } from '@nestjs/common';
 
 import { bindThis } from '@/decorators.js';
+import { ChartLoggerService } from '@/core/chart/ChartLoggerService.js';
+import Logger from '@/logger.js';
 import FederationChart from './charts/federation.js';
 import NotesChart from './charts/notes.js';
 import UsersChart from './charts/users.js';
@@ -24,6 +26,7 @@ import type { OnApplicationShutdown } from '@nestjs/common';
 export class ChartManagementService implements OnApplicationShutdown {
 	private charts;
 	private saveIntervalId: NodeJS.Timeout;
+	private readonly logger: Logger;
 
 	constructor(
 		private federationChart: FederationChart,
@@ -38,6 +41,7 @@ export class ChartManagementService implements OnApplicationShutdown {
 		private perUserFollowingChart: PerUserFollowingChart,
 		private perUserDriveChart: PerUserDriveChart,
 		private apRequestChart: ApRequestChart,
+		private chartLoggerService: ChartLoggerService,
 	) {
 		this.charts = [
 			this.federationChart,
@@ -53,6 +57,7 @@ export class ChartManagementService implements OnApplicationShutdown {
 			this.perUserDriveChart,
 			this.apRequestChart,
 		];
+		this.logger = chartLoggerService.logger;
 	}
 
 	@bindThis
@@ -62,6 +67,7 @@ export class ChartManagementService implements OnApplicationShutdown {
 			for (const chart of this.charts) {
 				chart.save();
 			}
+			this.logger.info('All charts saved');
 		}, 1000 * 60 * 20);
 	}
 
@@ -72,6 +78,7 @@ export class ChartManagementService implements OnApplicationShutdown {
 			await Promise.all(
 				this.charts.map(chart => chart.save()),
 			);
+			this.logger.info('All charts saved');
 		}
 	}
 
diff --git a/packages/backend/src/core/chart/core.ts b/packages/backend/src/core/chart/core.ts
index af5485a46e..234c1d63b4 100644
--- a/packages/backend/src/core/chart/core.ts
+++ b/packages/backend/src/core/chart/core.ts
@@ -368,7 +368,7 @@ export default abstract class Chart<T extends Schema> {
 			// 初期ログデータを作成
 			data = this.getNewLog(null);
 
-			this.logger.info(`${this.name + (group ? `:${group}` : '')}(${span}): Initial commit created`);
+			this.logger.debug(`${this.name + (group ? `:${group}` : '')}(${span}): Initial commit created`);
 		}
 
 		const date = Chart.dateToTimestamp(current);
@@ -398,7 +398,7 @@ export default abstract class Chart<T extends Schema> {
 				...columns,
 			}) as RawRecord<T>;
 
-			this.logger.info(`${this.name + (group ? `:${group}` : '')}(${span}): New commit created`);
+			this.logger.debug(`${this.name + (group ? `:${group}` : '')}(${span}): New commit created`);
 
 			return log;
 		} finally {
@@ -418,7 +418,7 @@ export default abstract class Chart<T extends Schema> {
 	@bindThis
 	public async save(): Promise<void> {
 		if (this.buffer.length === 0) {
-			this.logger.info(`${this.name}: Write skipped`);
+			this.logger.debug(`${this.name}: Write skipped`);
 			return;
 		}
 
@@ -519,7 +519,7 @@ export default abstract class Chart<T extends Schema> {
 					.execute(),
 			]);
 
-			this.logger.info(`${this.name + (logHour.group ? `:${logHour.group}` : '')}: Updated`);
+			this.logger.debug(`${this.name + (logHour.group ? `:${logHour.group}` : '')}: Updated`);
 
 			// TODO: この一連の処理が始まった後に新たにbufferに入ったものは消さないようにする
 			this.buffer = this.buffer.filter(q => q.group != null && (q.group !== logHour.group));