diff --git a/packages/backend/src/core/FederatedInstanceService.ts b/packages/backend/src/core/FederatedInstanceService.ts
index e028265bdc..1ead73b25a 100644
--- a/packages/backend/src/core/FederatedInstanceService.ts
+++ b/packages/backend/src/core/FederatedInstanceService.ts
@@ -23,8 +23,8 @@ export class FederatedInstanceService {
 		private idService: IdService,
 	) {
 		this.federatedInstanceCache = new RedisKVCache<Instance | null>(this.redisClient, 'federatedInstance', {
-			lifetime: 1000 * 60 * 60 * 24, // 24h
-			memoryCacheLifetime: 1000 * 60 * 30, // 30m
+			lifetime: 1000 * 60 * 30, // 30m
+			memoryCacheLifetime: 1000 * 60 * 3, // 3m
 			fetcher: (key) => this.instancesRepository.findOneBy({ host: key }),
 			toRedisConverter: (value) => JSON.stringify(value),
 			fromRedisConverter: (value) => {
@@ -65,15 +65,10 @@ export class FederatedInstanceService {
 	}
 
 	@bindThis
-	public async updateCachePartial(host: string, data: Partial<Instance>): Promise<void> {
-		host = this.utilityService.toPuny(host);
+	public async update(id: Instance['id'], data: Partial<Instance>): Promise<void> {
+		const result = await this.instancesRepository.update(id, data);
+		const updated = result.raw[0];
 	
-		const cached = await this.federatedInstanceCache.get(host);
-		if (cached == null) return;
-	
-		this.federatedInstanceCache.set(host, {
-			...cached,
-			...data,
-		});
+		this.federatedInstanceCache.set(updated.host, updated);
 	}
 }
diff --git a/packages/backend/src/core/FetchInstanceMetadataService.ts b/packages/backend/src/core/FetchInstanceMetadataService.ts
index bbc8b4332e..1aa262ac1d 100644
--- a/packages/backend/src/core/FetchInstanceMetadataService.ts
+++ b/packages/backend/src/core/FetchInstanceMetadataService.ts
@@ -10,6 +10,7 @@ import { DI } from '@/di-symbols.js';
 import { LoggerService } from '@/core/LoggerService.js';
 import { HttpRequestService } from '@/core/HttpRequestService.js';
 import { bindThis } from '@/decorators.js';
+import { FederatedInstanceService } from '@/core/FederatedInstanceService';
 import type { DOMWindow } from 'jsdom';
 
 type NodeInfo = {
@@ -42,6 +43,7 @@ export class FetchInstanceMetadataService {
 		private appLockService: AppLockService,
 		private httpRequestService: HttpRequestService,
 		private loggerService: LoggerService,
+		private federatedInstanceService: FederatedInstanceService,
 	) {
 		this.logger = this.loggerService.getLogger('metadata', 'cyan');
 	}
@@ -96,7 +98,7 @@ export class FetchInstanceMetadataService {
 			if (favicon) updates.faviconUrl = favicon;
 			if (themeColor) updates.themeColor = themeColor;
 	
-			await this.instancesRepository.update(instance.id, updates);
+			await this.federatedInstanceService.update(instance.id, updates);
 	
 			this.logger.succ(`Successfuly updated metadata of ${instance.host}`);
 		} catch (e) {
diff --git a/packages/backend/src/queue/processors/DeliverProcessorService.ts b/packages/backend/src/queue/processors/DeliverProcessorService.ts
index 0e99b7bcd2..f293bd4d7e 100644
--- a/packages/backend/src/queue/processors/DeliverProcessorService.ts
+++ b/packages/backend/src/queue/processors/DeliverProcessorService.ts
@@ -79,10 +79,7 @@ export class DeliverProcessorService {
 			// Update stats
 			this.federatedInstanceService.fetch(host).then(i => {
 				if (i.isNotResponding) {
-					this.instancesRepository.update(i.id, {
-						isNotResponding: false,
-					});
-					this.federatedInstanceService.updateCachePartial(host, {
+					this.federatedInstanceService.update(i.id, {
 						isNotResponding: false,
 					});
 				}
@@ -101,10 +98,7 @@ export class DeliverProcessorService {
 			// Update stats
 			this.federatedInstanceService.fetch(host).then(i => {
 				if (!i.isNotResponding) {
-					this.instancesRepository.update(i.id, {
-						isNotResponding: true,
-					});
-					this.federatedInstanceService.updateCachePartial(host, {
+					this.federatedInstanceService.update(i.id, {
 						isNotResponding: true,
 					});
 				}
@@ -123,10 +117,7 @@ export class DeliverProcessorService {
 					// 相手が閉鎖していることを明示しているため、配送停止する
 					if (job.data.isSharedInbox && res.statusCode === 410) {
 						this.federatedInstanceService.fetch(host).then(i => {
-							this.instancesRepository.update(i.id, {
-								isSuspended: true,
-							});
-							this.federatedInstanceService.updateCachePartial(host, {
+							this.federatedInstanceService.update(i.id, {
 								isSuspended: true,
 							});
 						});
diff --git a/packages/backend/src/queue/processors/InboxProcessorService.ts b/packages/backend/src/queue/processors/InboxProcessorService.ts
index ed7f38d013..ada6f9e967 100644
--- a/packages/backend/src/queue/processors/InboxProcessorService.ts
+++ b/packages/backend/src/queue/processors/InboxProcessorService.ts
@@ -174,13 +174,10 @@ export class InboxProcessorService {
 
 		// Update stats
 		this.federatedInstanceService.fetch(authUser.user.host).then(i => {
-			this.instancesRepository.update(i.id, {
+			this.federatedInstanceService.update(i.id, {
 				latestRequestReceivedAt: new Date(),
 				isNotResponding: false,
 			});
-			this.federatedInstanceService.updateCachePartial(host, {
-				isNotResponding: false,
-			});
 
 			this.fetchInstanceMetadataService.fetchInstanceMetadata(i);
 
diff --git a/packages/backend/src/server/api/endpoints/admin/federation/update-instance.ts b/packages/backend/src/server/api/endpoints/admin/federation/update-instance.ts
index 0a529ecb08..4fd74e591d 100644
--- a/packages/backend/src/server/api/endpoints/admin/federation/update-instance.ts
+++ b/packages/backend/src/server/api/endpoints/admin/federation/update-instance.ts
@@ -3,6 +3,7 @@ import { Endpoint } from '@/server/api/endpoint-base.js';
 import type { InstancesRepository } from '@/models/index.js';
 import { UtilityService } from '@/core/UtilityService.js';
 import { DI } from '@/di-symbols.js';
+import { FederatedInstanceService } from '@/core/FederatedInstanceService.js';
 
 export const meta = {
 	tags: ['admin'],
@@ -28,6 +29,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 		private instancesRepository: InstancesRepository,
 
 		private utilityService: UtilityService,
+		private federatedInstanceService: FederatedInstanceService,
 	) {
 		super(meta, paramDef, async (ps, me) => {
 			const instance = await this.instancesRepository.findOneBy({ host: this.utilityService.toPuny(ps.host) });
@@ -36,7 +38,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 				throw new Error('instance not found');
 			}
 
-			this.instancesRepository.update({ host: this.utilityService.toPuny(ps.host) }, {
+			this.federatedInstanceService.update(instance.id, {
 				isSuspended: ps.isSuspended,
 			});
 		});