diff --git a/packages/backend/src/queue/processors/CleanRemoteNotesProcessorService.ts b/packages/backend/src/queue/processors/CleanRemoteNotesProcessorService.ts
new file mode 100644
index 0000000000..555304f904
--- /dev/null
+++ b/packages/backend/src/queue/processors/CleanRemoteNotesProcessorService.ts
@@ -0,0 +1,80 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import { setTimeout } from 'node:timers/promises';
+import { Inject, Injectable } from '@nestjs/common';
+import { IsNull, MoreThan, Not } from 'typeorm';
+import { DI } from '@/di-symbols.js';
+import type { MiNote, NotesRepository } from '@/models/_.js';
+import type Logger from '@/logger.js';
+import { bindThis } from '@/decorators.js';
+import { QueueLoggerService } from '../QueueLoggerService.js';
+import type * as Bull from 'bullmq';
+
+@Injectable()
+export class CleanRemoteNotesProcessorService {
+	private logger: Logger;
+
+	constructor(
+		@Inject(DI.notesRepository)
+		private notesRepository: NotesRepository,
+
+		private queueLoggerService: QueueLoggerService,
+	) {
+		this.logger = this.queueLoggerService.logger.createSubLogger('clean-remote-notes');
+	}
+
+	@bindThis
+	public async process(job: Bull.Job<Record<string, unknown>>): Promise<void> {
+		this.logger.info('garbage collecting remote notes...');
+
+		const maxDuration = 1000 * 60 * 60; // 1 hour
+		const startAt = Date.now();
+
+		let deletedCount = 0;
+		let cursor: MiNote['id'] | null = null;
+
+		while (true) {
+			const notes = await this.notesRepository.find({
+				where: {
+					userHost: Not(IsNull()),
+					// TODO: お気に入りされてないか、クリップに入ってないかなどの判定
+					...(cursor ? { id: MoreThan(cursor) } : {}),
+				},
+				take: 50,
+				order: {
+					id: 1,
+				},
+			});
+
+			if (notes.length === 0) {
+				job.updateProgress(100);
+				break;
+			}
+
+			await this.notesRepository.delete(notes.map(note => note.id));
+
+			cursor = notes.at(-1)?.id ?? null;
+
+			deletedCount += notes.length;
+
+			const elapsed = Date.now() - startAt;
+
+			if (elapsed >= maxDuration) {
+				this.logger.info(`Reached maximum duration of ${maxDuration}ms, stopping...`);
+				job.updateProgress(100);
+				break;
+			}
+
+			job.updateProgress((elapsed / maxDuration) * 100);
+
+			await setTimeout(1000 * 5); // Sleep for 5s to avoid overwhelming the db
+		}
+
+		this.logger.succ('garbage collection of remote notes completed.');
+
+		// TODO: 実行結果をDBに保存する
+	}
+}