diff --git a/packages/backend/src/core/GlobalEventService.ts b/packages/backend/src/core/GlobalEventService.ts
index 3215b41c8d..d82a99fbf4 100644
--- a/packages/backend/src/core/GlobalEventService.ts
+++ b/packages/backend/src/core/GlobalEventService.ts
@@ -225,7 +225,7 @@ type UndefinedAsNullAll<T> = {
 };
 
 export interface InternalEventTypes {
-	userChangeSuspendedState: { id: MiUser['id']; isSuspended: MiUser['isSuspended']; };
+	userChangeSuspendedState: { id: MiUser['id']; isSuspended: MiUser['isSuspended']; } | { id: MiUser['id']; isRemoteSuspended: MiUser['isRemoteSuspended']; };
 	userChangeDeletedState: { id: MiUser['id']; isDeleted: MiUser['isDeleted']; };
 	userTokenRegenerated: { id: MiUser['id']; oldToken: string; newToken: string; };
 	remoteUserUpdated: { id: MiUser['id']; };
diff --git a/packages/backend/src/core/UserSuspendService.ts b/packages/backend/src/core/UserSuspendService.ts
index 61f7731d1b..e425b01c9f 100644
--- a/packages/backend/src/core/UserSuspendService.ts
+++ b/packages/backend/src/core/UserSuspendService.ts
@@ -5,7 +5,7 @@
 
 import { Inject, Injectable } from '@nestjs/common';
 import type { FollowingsRepository, FollowRequestsRepository, UsersRepository } from '@/models/_.js';
-import type { MiUser } from '@/models/User.js';
+import type { MiRemoteUser, MiUser } from '@/models/User.js';
 import { GlobalEventService } from '@/core/GlobalEventService.js';
 import { DI } from '@/di-symbols.js';
 import { UserEntityService } from '@/core/entities/UserEntityService.js';
@@ -45,11 +45,20 @@ export class UserSuspendService {
 		});
 
 		(async () => {
-			await this.postSuspend(user).catch((e: any) => {});
-			await this.suspendFollowings(user).catch((e: any) => {});
+			await this.postSuspend(user, false).catch((e: any) => { });
+			await this.suspendFollowings(user).catch((e: any) => { });
 		})();
 	}
 
+	@bindThis
+	public async suspendFromRemote(user: { id: MiRemoteUser['id']; host: MiRemoteUser['host'] }): Promise<void> {
+		await this.usersRepository.update(user.id, {
+			isRemoteSuspended: true,
+		});
+
+		this.postSuspend(user, true);
+	}
+
 	@bindThis
 	public async unsuspend(user: MiUser, moderator: MiUser): Promise<void> {
 		await this.usersRepository.update(user.id, {
@@ -63,14 +72,26 @@ export class UserSuspendService {
 		});
 
 		(async () => {
-			await this.postUnsuspend(user).catch((e: any) => {});
-			await this.restoreFollowings(user).catch((e: any) => {});
+			await this.postUnsuspend(user, false).catch((e: any) => { });
+			await this.restoreFollowings(user).catch((e: any) => { });
 		})();
 	}
 
 	@bindThis
-	private async postSuspend(user: { id: MiUser['id']; host: MiUser['host'] }): Promise<void> {
-		this.globalEventService.publishInternalEvent('userChangeSuspendedState', { id: user.id, isSuspended: true });
+	public async unsuspendFromRemote(user: { id: MiRemoteUser['id']; host: MiRemoteUser['host'] }): Promise<void> {
+		await this.usersRepository.update(user.id, {
+			isRemoteSuspended: false,
+		});
+
+		this.postUnsuspend(user, true);
+	}
+
+	@bindThis
+	private async postSuspend(user: { id: MiUser['id']; host: MiUser['host'] }, isFromRemote: boolean): Promise<void> {
+		this.globalEventService.publishInternalEvent(
+			'userChangeSuspendedState',
+			isFromRemote ? { id: user.id, isRemoteSuspended: true } : { id: user.id, isSuspended: true }
+		);
 
 		this.followRequestsRepository.delete({
 			followeeId: user.id,
@@ -85,8 +106,11 @@ export class UserSuspendService {
 	}
 
 	@bindThis
-	private async postUnsuspend(user: MiUser): Promise<void> {
-		this.globalEventService.publishInternalEvent('userChangeSuspendedState', { id: user.id, isSuspended: false });
+	private async postUnsuspend(user: { id: MiUser['id']; host: MiUser['host'] }, isFromRemote: boolean): Promise<void> {
+		this.globalEventService.publishInternalEvent(
+			'userChangeSuspendedState',
+			isFromRemote ? { id: user.id, isRemoteSuspended: false } : { id: user.id, isSuspended: false }
+		);
 
 		if (this.userEntityService.isLocalUser(user)) {
 			this.accountUpdateService.publishToFollowersAndSharedInboxAndRelays(user.id);
@@ -94,7 +118,7 @@ export class UserSuspendService {
 	}
 
 	@bindThis
-	private async suspendFollowings(follower: MiUser) {
+	private async suspendFollowings(follower: { id: MiUser['id'] }) {
 		await this.followingsRepository.update(
 			{
 				followerId: follower.id,
@@ -106,7 +130,18 @@ export class UserSuspendService {
 	}
 
 	@bindThis
-	private async restoreFollowings(follower: MiUser) {
+	private async restoreFollowings(_follower: { id: MiUser['id'] }) {
+		// 最新の情報を取得
+		const follower = await this.usersRepository.findOneBy({ id: _follower.id });
+		if (follower == null) {
+			// ユーザーが削除されている場合は何もしないでおく
+			return;
+		}
+		if (follower.isSuspended || follower.isRemoteSuspended) {
+			// フォロー関係を復元しない
+			return;
+		}
+
 		// フォロー関係を復元（isFollowerSuspended: false）に変更
 		await this.followingsRepository.update(
 			{
diff --git a/packages/backend/src/core/activitypub/models/ApPersonService.ts b/packages/backend/src/core/activitypub/models/ApPersonService.ts
index 4673875e1f..4e548347f0 100644
--- a/packages/backend/src/core/activitypub/models/ApPersonService.ts
+++ b/packages/backend/src/core/activitypub/models/ApPersonService.ts
@@ -48,6 +48,7 @@ import type { ApLoggerService } from '../ApLoggerService.js';
 
 import type { ApImageService } from './ApImageService.js';
 import type { IActor, ICollection, IObject, IOrderedCollection } from '../type.js';
+import { UserSuspendService } from '@/core/UserSuspendService.js';
 
 const nameLength = 128;
 const summaryLength = 2048;
@@ -74,6 +75,7 @@ export class ApPersonService implements OnModuleInit {
 	private instanceChart: InstanceChart;
 	private apLoggerService: ApLoggerService;
 	private accountMoveService: AccountMoveService;
+	private userSuspendService: UserSuspendService;
 	private logger: Logger;
 
 	constructor(
@@ -126,6 +128,7 @@ export class ApPersonService implements OnModuleInit {
 		this.instanceChart = this.moduleRef.get('InstanceChart');
 		this.apLoggerService = this.moduleRef.get('ApLoggerService');
 		this.accountMoveService = this.moduleRef.get('AccountMoveService');
+		this.userSuspendService = this.moduleRef.get('UserSuspendService');
 		this.logger = this.apLoggerService.logger;
 	}
 
@@ -600,6 +603,17 @@ export class ApPersonService implements OnModuleInit {
 			return 'skip';
 		}
 
+		//#region suspend
+		if (exist.isRemoteSuspended === false && person.suspended === true) {
+			// リモートサーバーでアカウントが凍結された
+			this.userSuspendService.suspendFromRemote({ id: exist.id, host: exist.host });
+		}
+		if (exist.isRemoteSuspended === true && person.suspended === false) {
+			// リモートサーバーでアカウントが解凍された
+			this.userSuspendService.unsuspendFromRemote({ id: exist.id, host: exist.host });
+		}
+		//#endregion
+
 		if (person.publicKey) {
 			await this.userPublickeysRepository.update({ userId: exist.id }, {
 				keyId: person.publicKey.id,
diff --git a/packages/backend/test-federation/test/user-suspension.test.ts b/packages/backend/test-federation/test/user-suspension.test.ts
index ae7f88a6a7..e5d119d564 100644
--- a/packages/backend/test-federation/test/user-suspension.test.ts
+++ b/packages/backend/test-federation/test/user-suspension.test.ts
@@ -113,449 +113,4 @@ describe('User Suspension', () => {
 			});
 		});
 	});
-
-	describe('Profile', () => {
-		describe('Consistency of profile', () => {
-			let alice: LoginUser;
-			let aliceWatcher: LoginUser;
-			let aliceWatcherInB: LoginUser;
-
-			beforeAll(async () => {
-				alice = await createAccount('a.test');
-				[
-					aliceWatcher,
-					aliceWatcherInB,
-				] = await Promise.all([
-					createAccount('a.test'),
-					createAccount('b.test'),
-				]);
-			});
-
-			test('Check consistency', async () => {
-				const aliceInA = await aliceWatcher.client.request('users/show', { userId: alice.id });
-				const resolved = await resolveRemoteUser('a.test', aliceInA.id, aliceWatcherInB);
-				const aliceInB = await aliceWatcherInB.client.request('users/show', { userId: resolved.id });
-
-				// console.log(`a.test: ${JSON.stringify(aliceInA, null, '\t')}`);
-				// console.log(`b.test: ${JSON.stringify(aliceInB, null, '\t')}`);
-
-				deepStrictEqualWithExcludedFields(aliceInA, aliceInB, [
-					'id',
-					'host',
-					'avatarUrl',
-					'avatarBlurhash',
-					'instance',
-					'badgeRoles',
-					'url',
-					'uri',
-					'createdAt',
-					'lastFetchedAt',
-					'publicReactions',
-				]);
-			});
-		});
-
-		describe('ffVisibility is federated', () => {
-			let alice: LoginUser, bob: LoginUser;
-			let bobInA: Misskey.entities.UserDetailedNotMe, aliceInB: Misskey.entities.UserDetailedNotMe;
-
-			beforeAll(async () => {
-				[alice, bob] = await Promise.all([
-					createAccount('a.test'),
-					createAccount('b.test'),
-				]);
-
-				[bobInA, aliceInB] = await Promise.all([
-					resolveRemoteUser('b.test', bob.id, alice),
-					resolveRemoteUser('a.test', alice.id, bob),
-				]);
-
-				// NOTE: follow each other
-				await Promise.all([
-					alice.client.request('following/create', { userId: bobInA.id }),
-					bob.client.request('following/create', { userId: aliceInB.id }),
-				]);
-				await sleep();
-			});
-
-			test('Visibility set public by default', async () => {
-				for (const user of await Promise.all([
-					alice.client.request('users/show', { userId: bobInA.id }),
-					bob.client.request('users/show', { userId: aliceInB.id }),
-				])) {
-					strictEqual(user.followersVisibility, 'public');
-					strictEqual(user.followingVisibility, 'public');
-				}
-			});
-
-			/** FIXME: not working */
-			test.skip('Setting private for followersVisibility is federated', async () => {
-				await Promise.all([
-					alice.client.request('i/update', { followersVisibility: 'private' }),
-					bob.client.request('i/update', { followersVisibility: 'private' }),
-				]);
-				await sleep();
-
-				for (const user of await Promise.all([
-					alice.client.request('users/show', { userId: bobInA.id }),
-					bob.client.request('users/show', { userId: aliceInB.id }),
-				])) {
-					strictEqual(user.followersVisibility, 'private');
-					strictEqual(user.followingVisibility, 'public');
-				}
-			});
-
-			test.skip('Setting private for followingVisibility is federated', async () => {
-				await Promise.all([
-					alice.client.request('i/update', { followingVisibility: 'private' }),
-					bob.client.request('i/update', { followingVisibility: 'private' }),
-				]);
-				await sleep();
-
-				for (const user of await Promise.all([
-					alice.client.request('users/show', { userId: bobInA.id }),
-					bob.client.request('users/show', { userId: aliceInB.id }),
-				])) {
-					strictEqual(user.followersVisibility, 'private');
-					strictEqual(user.followingVisibility, 'private');
-				}
-			});
-		});
-
-		describe('isCat is federated', () => {
-			let alice: LoginUser, bob: LoginUser;
-			let bobInA: Misskey.entities.UserDetailedNotMe, aliceInB: Misskey.entities.UserDetailedNotMe;
-
-			beforeAll(async () => {
-				[alice, bob] = await Promise.all([
-					createAccount('a.test'),
-					createAccount('b.test'),
-				]);
-
-				[bobInA, aliceInB] = await Promise.all([
-					resolveRemoteUser('b.test', bob.id, alice),
-					resolveRemoteUser('a.test', alice.id, bob),
-				]);
-			});
-
-			test('Not isCat for default', () => {
-				strictEqual(aliceInB.isCat, false);
-			});
-
-			test('Becoming a cat is sent to their followers', async () => {
-				await bob.client.request('following/create', { userId: aliceInB.id });
-				await sleep();
-
-				await alice.client.request('i/update', { isCat: true });
-				await sleep();
-
-				const res = await bob.client.request('users/show', { userId: aliceInB.id });
-				strictEqual(res.isCat, true);
-			});
-		});
-
-		describe('Pinning Notes', () => {
-			let alice: LoginUser, bob: LoginUser;
-			let aliceInB: Misskey.entities.UserDetailedNotMe;
-
-			beforeAll(async () => {
-				[alice, bob] = await Promise.all([
-					createAccount('a.test'),
-					createAccount('b.test'),
-				]);
-				aliceInB = await resolveRemoteUser('a.test', alice.id, bob);
-
-				await bob.client.request('following/create', { userId: aliceInB.id });
-			});
-
-			test('Pinning localOnly Note is not delivered', async () => {
-				const note = (await alice.client.request('notes/create', { text: 'a', localOnly: true })).createdNote;
-				await alice.client.request('i/pin', { noteId: note.id });
-				await sleep();
-
-				const _aliceInB = await bob.client.request('users/show', { userId: aliceInB.id });
-				strictEqual(_aliceInB.pinnedNoteIds.length, 0);
-			});
-
-			test('Pinning followers-only Note is not delivered', async () => {
-				const note = (await alice.client.request('notes/create', { text: 'a', visibility: 'followers' })).createdNote;
-				await alice.client.request('i/pin', { noteId: note.id });
-				await sleep();
-
-				const _aliceInB = await bob.client.request('users/show', { userId: aliceInB.id });
-				strictEqual(_aliceInB.pinnedNoteIds.length, 0);
-			});
-
-			let pinnedNote: Misskey.entities.Note;
-
-			test('Pinning normal Note is delivered', async () => {
-				pinnedNote = (await alice.client.request('notes/create', { text: 'a' })).createdNote;
-				await alice.client.request('i/pin', { noteId: pinnedNote.id });
-				await sleep();
-
-				const _aliceInB = await bob.client.request('users/show', { userId: aliceInB.id });
-				strictEqual(_aliceInB.pinnedNoteIds.length, 1);
-				const pinnedNoteInB = await resolveRemoteNote('a.test', pinnedNote.id, bob);
-				strictEqual(_aliceInB.pinnedNotes[0].id, pinnedNoteInB.id);
-			});
-
-			test('Unpinning normal Note is delivered', async () => {
-				await alice.client.request('i/unpin', { noteId: pinnedNote.id });
-				await sleep();
-
-				const _aliceInB = await bob.client.request('users/show', { userId: aliceInB.id });
-				strictEqual(_aliceInB.pinnedNoteIds.length, 0);
-			});
-		});
-	});
-
-	describe('Follow / Unfollow', () => {
-		let alice: LoginUser, bob: LoginUser;
-		let bobInA: Misskey.entities.UserDetailedNotMe, aliceInB: Misskey.entities.UserDetailedNotMe;
-
-		beforeAll(async () => {
-			[alice, bob] = await Promise.all([
-				createAccount('a.test'),
-				createAccount('b.test'),
-			]);
-
-			[bobInA, aliceInB] = await Promise.all([
-				resolveRemoteUser('b.test', bob.id, alice),
-				resolveRemoteUser('a.test', alice.id, bob),
-			]);
-		});
-
-		describe('Follow a.test ==> b.test', () => {
-			beforeAll(async () => {
-				await alice.client.request('following/create', { userId: bobInA.id });
-
-				await sleep();
-			});
-
-			test('Check consistency with `users/following` and `users/followers` endpoints', async () => {
-				await Promise.all([
-					strictEqual(
-						(await alice.client.request('users/following', { userId: alice.id }))
-							.some(v => v.followeeId === bobInA.id),
-						true,
-					),
-					strictEqual(
-						(await bob.client.request('users/followers', { userId: bob.id }))
-							.some(v => v.followerId === aliceInB.id),
-						true,
-					),
-				]);
-			});
-		});
-
-		describe('Unfollow a.test ==> b.test', () => {
-			beforeAll(async () => {
-				await alice.client.request('following/delete', { userId: bobInA.id });
-
-				await sleep();
-			});
-
-			test('Check consistency with `users/following` and `users/followers` endpoints', async () => {
-				await Promise.all([
-					strictEqual(
-						(await alice.client.request('users/following', { userId: alice.id }))
-							.some(v => v.followeeId === bobInA.id),
-						false,
-					),
-					strictEqual(
-						(await bob.client.request('users/followers', { userId: bob.id }))
-							.some(v => v.followerId === aliceInB.id),
-						false,
-					),
-				]);
-			});
-		});
-	});
-
-	describe('Follow requests', () => {
-		let alice: LoginUser, bob: LoginUser;
-		let bobInA: Misskey.entities.UserDetailedNotMe, aliceInB: Misskey.entities.UserDetailedNotMe;
-
-		beforeAll(async () => {
-			[alice, bob] = await Promise.all([
-				createAccount('a.test'),
-				createAccount('b.test'),
-			]);
-
-			[bobInA, aliceInB] = await Promise.all([
-				resolveRemoteUser('b.test', bob.id, alice),
-				resolveRemoteUser('a.test', alice.id, bob),
-			]);
-
-			await alice.client.request('i/update', { isLocked: true });
-		});
-
-		describe('Send follow request from Bob to Alice and cancel', () => {
-			describe('Bob sends follow request to Alice', () => {
-				beforeAll(async () => {
-					await bob.client.request('following/create', { userId: aliceInB.id });
-					await sleep();
-				});
-
-				test('Alice should have a request', async () => {
-					const requests = await alice.client.request('following/requests/list', {});
-					strictEqual(requests.length, 1);
-					strictEqual(requests[0].followee.id, alice.id);
-					strictEqual(requests[0].follower.id, bobInA.id);
-				});
-			});
-
-			describe('Alice cancels it', () => {
-				beforeAll(async () => {
-					await bob.client.request('following/requests/cancel', { userId: aliceInB.id });
-					await sleep();
-				});
-
-				test('Alice should have no requests', async () => {
-					const requests = await alice.client.request('following/requests/list', {});
-					strictEqual(requests.length, 0);
-				});
-			});
-		});
-
-		describe('Send follow request from Bob to Alice and reject', () => {
-			beforeAll(async () => {
-				await bob.client.request('following/create', { userId: aliceInB.id });
-				await sleep();
-
-				await alice.client.request('following/requests/reject', { userId: bobInA.id });
-				await sleep();
-			});
-
-			test('Bob should have no requests', async () => {
-				await rejects(
-					async () => await bob.client.request('following/requests/cancel', { userId: aliceInB.id }),
-					(err: any) => {
-						strictEqual(err.code, 'FOLLOW_REQUEST_NOT_FOUND');
-						return true;
-					},
-				);
-			});
-
-			test('Bob doesn\'t follow Alice', async () => {
-				const following = await bob.client.request('users/following', { userId: bob.id });
-				strictEqual(following.length, 0);
-			});
-		});
-
-		describe('Send follow request from Bob to Alice and accept', () => {
-			beforeAll(async () => {
-				await bob.client.request('following/create', { userId: aliceInB.id });
-				await sleep();
-
-				await alice.client.request('following/requests/accept', { userId: bobInA.id });
-				await sleep();
-			});
-
-			test('Bob follows Alice', async () => {
-				const following = await bob.client.request('users/following', { userId: bob.id });
-				strictEqual(following.length, 1);
-				strictEqual(following[0].followeeId, aliceInB.id);
-				strictEqual(following[0].followerId, bob.id);
-			});
-		});
-	});
-
-	describe('Deletion', () => {
-		describe('Check Delete consistency', () => {
-			let alice: LoginUser, bob: LoginUser;
-			let bobInA: Misskey.entities.UserDetailedNotMe, aliceInB: Misskey.entities.UserDetailedNotMe;
-
-			beforeAll(async () => {
-				[alice, bob] = await Promise.all([
-					createAccount('a.test'),
-					createAccount('b.test'),
-				]);
-
-				[bobInA, aliceInB] = await Promise.all([
-					resolveRemoteUser('b.test', bob.id, alice),
-					resolveRemoteUser('a.test', alice.id, bob),
-				]);
-			});
-
-			test('Bob follows Alice, and Alice deleted themself', async () => {
-				await bob.client.request('following/create', { userId: aliceInB.id });
-				await sleep();
-
-				const followers = await alice.client.request('users/followers', { userId: alice.id });
-				strictEqual(followers.length, 1); // followed by Bob
-
-				await alice.client.request('i/delete-account', { password: alice.password });
-				await sleep();
-
-				const following = await bob.client.request('users/following', { userId: bob.id });
-				strictEqual(following.length, 0); // no following relation
-
-				await rejects(
-					async () => await bob.client.request('following/create', { userId: aliceInB.id }),
-					(err: any) => {
-						strictEqual(err.code, 'NO_SUCH_USER');
-						return true;
-					},
-				);
-			});
-		});
-
-		describe('Deletion of remote user for moderation', () => {
-			let alice: LoginUser, bob: LoginUser;
-			let bobInA: Misskey.entities.UserDetailedNotMe, aliceInB: Misskey.entities.UserDetailedNotMe;
-
-			beforeAll(async () => {
-				[alice, bob] = await Promise.all([
-					createAccount('a.test'),
-					createAccount('b.test'),
-				]);
-
-				[bobInA, aliceInB] = await Promise.all([
-					resolveRemoteUser('b.test', bob.id, alice),
-					resolveRemoteUser('a.test', alice.id, bob),
-				]);
-			});
-
-			test('Bob follows Alice, then Alice gets deleted in B server', async () => {
-				await bob.client.request('following/create', { userId: aliceInB.id });
-				await sleep();
-
-				const followers = await alice.client.request('users/followers', { userId: alice.id });
-				strictEqual(followers.length, 1); // followed by Bob
-
-				await bAdmin.client.request('admin/delete-account', { userId: aliceInB.id });
-				await sleep();
-
-				/**
-				 * FIXME: remote account is not deleted!
-				 *        @see https://github.com/misskey-dev/misskey/issues/14728
-				 */
-				const deletedAlice = await bob.client.request('users/show', { userId: aliceInB.id });
-				assert(deletedAlice.id, aliceInB.id);
-
-				// TODO: why still following relation?
-				const following = await bob.client.request('users/following', { userId: bob.id });
-				strictEqual(following.length, 1);
-				await rejects(
-					async () => await bob.client.request('following/create', { userId: aliceInB.id }),
-					(err: any) => {
-						strictEqual(err.code, 'ALREADY_FOLLOWING');
-						return true;
-					},
-				);
-			});
-
-			test('Alice tries to follow Bob, but it is not processed', async () => {
-				await alice.client.request('following/create', { userId: bobInA.id });
-				await sleep();
-
-				const following = await alice.client.request('users/following', { userId: alice.id });
-				strictEqual(following.length, 0); // Not following Bob because B server doesn't return Accept
-
-				const followers = await bob.client.request('users/followers', { userId: bob.id });
-				strictEqual(followers.length, 0); // Alice's Follow is not processed
-			});
-		});
-	});
 });
diff --git a/packages/backend/test/unit/UserSuspendService.ts b/packages/backend/test/unit/UserSuspendService.ts
index 974b2c1903..b80e79b64d 100644
--- a/packages/backend/test/unit/UserSuspendService.ts
+++ b/packages/backend/test/unit/UserSuspendService.ts
@@ -400,7 +400,7 @@ describe('UserSuspendService', () => {
 		});
 	});
 
-	describe('remote user suspension', () => {
+	describe('suspension for remote user', () => {
 		test('should suspend remote user without AP delivery', async () => {
 			const remoteUser = await createUser({ host: genHost() });
 			const moderator = await createUser();
@@ -422,9 +422,7 @@ describe('UserSuspendService', () => {
 			// ActivityPub配信が呼ばれていないことを確認
 			expect(queueService.deliver).not.toHaveBeenCalled();
 		});
-	});
 
-	describe('remote user unsuspension', () => {
 		test('should unsuspend remote user without AP delivery', async () => {
 			const remoteUser = await createUser({ host: genHost(), isSuspended: true });
 			const moderator = await createUser();
@@ -448,4 +446,36 @@ describe('UserSuspendService', () => {
 			expect(queueService.deliver).not.toHaveBeenCalled();
 		});
 	});
+
+	describe('suspension from remote', () => {
+		test('should suspend remote user and post suspend event', async () => {
+			const remoteUser = { id: secureRndstr(16), host: genHost() };
+			await userSuspendService.suspendFromRemote(remoteUser);
+
+			// ユーザーがリモート凍結されているかチェック
+			const suspendedUser = await usersRepository.findOneBy({ id: remoteUser.id });
+			expect(suspendedUser?.isRemoteSuspended).toBe(true);
+
+			// イベントが発行されているかチェック
+			expect(globalEventService.publishInternalEvent).toHaveBeenCalledWith(
+				'userChangeSuspendedState',
+				{ id: remoteUser.id, isRemoteSuspended: true },
+			);
+		});
+
+		test('should unsuspend remote user and post unsuspend event', async () => {
+			const remoteUser = { id: secureRndstr(16), host: genHost() };
+			await userSuspendService.unsuspendFromRemote(remoteUser);
+
+			// ユーザーのリモート凍結が解除されているかチェック
+			const unsuspendedUser = await usersRepository.findOneBy({ id: remoteUser.id });
+			expect(unsuspendedUser?.isRemoteSuspended).toBe(false);
+
+			// イベントが発行されているかチェック
+			expect(globalEventService.publishInternalEvent).toHaveBeenCalledWith(
+				'userChangeSuspendedState',
+				{ id: remoteUser.id, isRemoteSuspended: false },
+			);
+		});
+	});
 });