diff --git a/packages/backend/src/core/CoreModule.ts b/packages/backend/src/core/CoreModule.ts
index 3c35dfc4ff..997d81facc 100644
--- a/packages/backend/src/core/CoreModule.ts
+++ b/packages/backend/src/core/CoreModule.ts
@@ -19,6 +19,7 @@ import { TimeService } from '@/core/TimeService.js';
 import { EnvService } from '@/core/EnvService.js';
 import { ApUtilityService } from '@/core/activitypub/ApUtilityService.js';
 import { ApLogService } from '@/core/ApLogService.js';
+import { UpdateInstanceQueue } from '@/core/UpdateInstanceQueue.js';
 import { AccountMoveService } from './AccountMoveService.js';
 import { AccountUpdateService } from './AccountUpdateService.js';
 import { AnnouncementService } from './AnnouncementService.js';
@@ -220,6 +221,7 @@ const $UserRenoteMutingService: Provider = { provide: 'UserRenoteMutingService',
 const $UserSearchService: Provider = { provide: 'UserSearchService', useExisting: UserSearchService };
 const $UserSuspendService: Provider = { provide: 'UserSuspendService', useExisting: UserSuspendService };
 const $UserAuthService: Provider = { provide: 'UserAuthService', useExisting: UserAuthService };
+const $UpdateInstanceQueue: Provider = { provide: 'UpdateInstanceQueue', useExisting: UpdateInstanceQueue };
 const $VideoProcessingService: Provider = { provide: 'VideoProcessingService', useExisting: VideoProcessingService };
 const $UserWebhookService: Provider = { provide: 'UserWebhookService', useExisting: UserWebhookService };
 const $SystemWebhookService: Provider = { provide: 'SystemWebhookService', useExisting: SystemWebhookService };
@@ -378,6 +380,7 @@ const $SponsorsService: Provider = { provide: 'SponsorsService', useExisting: Sp
 		UserSearchService,
 		UserSuspendService,
 		UserAuthService,
+		UpdateInstanceQueue,
 		VideoProcessingService,
 		UserWebhookService,
 		SystemWebhookService,
@@ -532,6 +535,7 @@ const $SponsorsService: Provider = { provide: 'SponsorsService', useExisting: Sp
 		$UserSearchService,
 		$UserSuspendService,
 		$UserAuthService,
+		$UpdateInstanceQueue,
 		$VideoProcessingService,
 		$UserWebhookService,
 		$SystemWebhookService,
@@ -687,6 +691,7 @@ const $SponsorsService: Provider = { provide: 'SponsorsService', useExisting: Sp
 		UserSearchService,
 		UserSuspendService,
 		UserAuthService,
+		UpdateInstanceQueue,
 		VideoProcessingService,
 		UserWebhookService,
 		SystemWebhookService,
@@ -840,6 +845,7 @@ const $SponsorsService: Provider = { provide: 'SponsorsService', useExisting: Sp
 		$UserSearchService,
 		$UserSuspendService,
 		$UserAuthService,
+		$UpdateInstanceQueue,
 		$VideoProcessingService,
 		$UserWebhookService,
 		$SystemWebhookService,
diff --git a/packages/backend/src/core/UpdateInstanceQueue.ts b/packages/backend/src/core/UpdateInstanceQueue.ts
new file mode 100644
index 0000000000..3fcd215ffa
--- /dev/null
+++ b/packages/backend/src/core/UpdateInstanceQueue.ts
@@ -0,0 +1,52 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import { Injectable, OnApplicationShutdown } from '@nestjs/common';
+import { CollapsedQueue } from '@/misc/collapsed-queue.js';
+import { bindThis } from '@/decorators.js';
+import { MiNote } from '@/models/Note.js';
+import { FederatedInstanceService } from '@/core/FederatedInstanceService.js';
+
+type UpdateInstanceJob = {
+	latestRequestReceivedAt: Date,
+	shouldUnsuspend: boolean,
+};
+
+// Moved from InboxProcessorService to allow access from ApInboxService
+@Injectable()
+export class UpdateInstanceQueue extends CollapsedQueue<MiNote['id'], UpdateInstanceJob> implements OnApplicationShutdown {
+	constructor(
+		private readonly federatedInstanceService: FederatedInstanceService,
+	) {
+		super(process.env.NODE_ENV !== 'test' ? 60 * 1000 * 5 : 0, (id, job) => this.collapseUpdateInstanceJobs(id, job), (id, job) => this.performUpdateInstance(id, job));
+	}
+
+	@bindThis
+	private collapseUpdateInstanceJobs(oldJob: UpdateInstanceJob, newJob: UpdateInstanceJob) {
+		const latestRequestReceivedAt = oldJob.latestRequestReceivedAt < newJob.latestRequestReceivedAt
+			? newJob.latestRequestReceivedAt
+			: oldJob.latestRequestReceivedAt;
+		const shouldUnsuspend = oldJob.shouldUnsuspend || newJob.shouldUnsuspend;
+		return {
+			latestRequestReceivedAt,
+			shouldUnsuspend,
+		};
+	}
+
+	@bindThis
+	private async performUpdateInstance(id: string, job: UpdateInstanceJob) {
+		await this.federatedInstanceService.update(id, {
+			latestRequestReceivedAt: new Date(),
+			isNotResponding: false,
+			// もしサーバーが死んでるために配信が止まっていた場合には自動的に復活させてあげる
+			suspensionState: job.shouldUnsuspend ? 'none' : undefined,
+		});
+	}
+
+	@bindThis
+	async onApplicationShutdown() {
+		await this.performAllNow();
+	}
+}
diff --git a/packages/backend/src/core/activitypub/ApInboxService.ts b/packages/backend/src/core/activitypub/ApInboxService.ts
index be1de3eab0..6e1359cbdc 100644
--- a/packages/backend/src/core/activitypub/ApInboxService.ts
+++ b/packages/backend/src/core/activitypub/ApInboxService.ts
@@ -3,7 +3,7 @@
  * SPDX-License-Identifier: AGPL-3.0-only
  */
 
-import { forwardRef, Inject, Injectable } from '@nestjs/common';
+import { Inject, Injectable } from '@nestjs/common';
 import { In } from 'typeorm';
 import * as Bull from 'bullmq';
 import { DI } from '@/di-symbols.js';
@@ -35,7 +35,7 @@ import { IdentifiableError } from '@/misc/identifiable-error.js';
 import InstanceChart from '@/core/chart/charts/instance.js';
 import FederationChart from '@/core/chart/charts/federation.js';
 import { FetchInstanceMetadataService } from '@/core/FetchInstanceMetadataService.js';
-import { InboxProcessorService } from '@/queue/processors/InboxProcessorService.js';
+import { UpdateInstanceQueue } from '@/core/UpdateInstanceQueue.js';
 import { getApHrefNullable, getApId, getApIds, getApType, getNullableApId, isAccept, isActor, isAdd, isAnnounce, isApObject, isBlock, isCollection, isCollectionOrOrderedCollection, isCreate, isDelete, isFlag, isFollow, isLike, isDislike, isMove, isPost, isReject, isRemove, isTombstone, isUndo, isUpdate, validActor, validPost, isActivity } from './type.js';
 import { ApNoteService } from './models/ApNoteService.js';
 import { ApLoggerService } from './ApLoggerService.js';
@@ -96,9 +96,7 @@ export class ApInboxService {
 		private readonly fetchInstanceMetadataService: FetchInstanceMetadataService,
 		private readonly instanceChart: InstanceChart,
 		private readonly federationChart: FederationChart,
-
-		@Inject(forwardRef(() => InboxProcessorService))
-		private readonly inboxProcessorService: InboxProcessorService,
+		private readonly updateInstanceQueue: UpdateInstanceQueue,
 	) {
 		this.logger = this.apLoggerService.logger;
 	}
@@ -430,7 +428,7 @@ export class ApInboxService {
 
 			if (i == null) return;
 
-			this.inboxProcessorService.updateInstanceQueue.enqueue(i.id, {
+			this.updateInstanceQueue.enqueue(i.id, {
 				latestRequestReceivedAt: new Date(),
 				shouldUnsuspend: i.suspensionState === 'autoSuspendedForNotResponding',
 			});
diff --git a/packages/backend/src/queue/processors/InboxProcessorService.ts b/packages/backend/src/queue/processors/InboxProcessorService.ts
index 839c8c183a..fc7c66591a 100644
--- a/packages/backend/src/queue/processors/InboxProcessorService.ts
+++ b/packages/backend/src/queue/processors/InboxProcessorService.ts
@@ -4,7 +4,7 @@
  */
 
 import { URL } from 'node:url';
-import { forwardRef, Inject, Injectable, OnApplicationShutdown } from '@nestjs/common';
+import { Inject, Injectable, OnApplicationShutdown } from '@nestjs/common';
 import httpSignature from '@peertube/http-signature';
 import * as Bull from 'bullmq';
 import type Logger from '@/logger.js';
@@ -25,13 +25,14 @@ import { JsonLdService } from '@/core/activitypub/JsonLdService.js';
 import { ApInboxService } from '@/core/activitypub/ApInboxService.js';
 import { bindThis } from '@/decorators.js';
 import { IdentifiableError } from '@/misc/identifiable-error.js';
-import { CollapsedQueue } from '@/misc/collapsed-queue.js';
-import { MiNote } from '@/models/Note.js';
+//import { CollapsedQueue } from '@/misc/collapsed-queue.js';
+//import { MiNote } from '@/models/Note.js';
 import { MiMeta } from '@/models/Meta.js';
 import { DI } from '@/di-symbols.js';
 import { SkApInboxLog } from '@/models/_.js';
 import type { Config } from '@/config.js';
 import { ApLogService, calculateDurationSince } from '@/core/ApLogService.js';
+import { UpdateInstanceQueue } from '@/core/UpdateInstanceQueue.js';
 import { QueueLoggerService } from '../QueueLoggerService.js';
 import type { InboxJobData } from '../types.js';
 
@@ -43,7 +44,7 @@ type UpdateInstanceJob = {
 @Injectable()
 export class InboxProcessorService implements OnApplicationShutdown {
 	private logger: Logger;
-	public readonly updateInstanceQueue: CollapsedQueue<MiNote['id'], UpdateInstanceJob>;
+	//private updateInstanceQueue: CollapsedQueue<MiNote['id'], UpdateInstanceJob>;
 
 	constructor(
 		@Inject(DI.meta)
@@ -53,8 +54,6 @@ export class InboxProcessorService implements OnApplicationShutdown {
 		private config: Config,
 
 		private utilityService: UtilityService,
-
-		@Inject(forwardRef(() => ApInboxService))
 		private apInboxService: ApInboxService,
 		private federatedInstanceService: FederatedInstanceService,
 		private fetchInstanceMetadataService: FetchInstanceMetadataService,
@@ -66,9 +65,10 @@ export class InboxProcessorService implements OnApplicationShutdown {
 		private federationChart: FederationChart,
 		private queueLoggerService: QueueLoggerService,
 		private readonly apLogService: ApLogService,
+		private readonly updateInstanceQueue: UpdateInstanceQueue,
 	) {
 		this.logger = this.queueLoggerService.logger.createSubLogger('inbox');
-		this.updateInstanceQueue = new CollapsedQueue(process.env.NODE_ENV !== 'test' ? 60 * 1000 * 5 : 0, this.collapseUpdateInstanceJobs, this.performUpdateInstance);
+		//this.updateInstanceQueue = new CollapsedQueue(process.env.NODE_ENV !== 'test' ? 60 * 1000 * 5 : 0, this.collapseUpdateInstanceJobs, this.performUpdateInstance);
 	}
 
 	@bindThis
@@ -335,9 +335,7 @@ export class InboxProcessorService implements OnApplicationShutdown {
 	}
 
 	@bindThis
-	public async dispose(): Promise<void> {
-		await this.updateInstanceQueue.performAllNow();
-	}
+	public async dispose(): Promise<void> {}
 
 	@bindThis
 	async onApplicationShutdown(signal?: string) {