diff --git a/packages/backend/src/models/repositories/user.ts b/packages/backend/src/models/repositories/user.ts
index 7f971f534..17b7987a4 100644
--- a/packages/backend/src/models/repositories/user.ts
+++ b/packages/backend/src/models/repositories/user.ts
@@ -41,65 +41,6 @@ export class UserRepository extends Repository<User> {
 	public validateBirthday = ajv.compile(this.birthdaySchema);
 	//#endregion
 
-	private suspendedUsersCache: Set<User['id']> = new Set();
-	private silencedUsersCache: Set<User['id']> = new Set();
-	private moderatorsCache: Set<User['id']> = new Set();
-
-	constructor() {
-		super();
-
-		const fetchCache = () => {
-			this.find({
-				where: {
-					isSuspended: true,
-				},
-				select: ['id'],
-			}).then(users => {
-				this.suspendedUsersCache = new Set(users.map(user => user.id));
-			});
-
-			this.find({
-				where: {
-					isSilenced: true,
-				},
-				select: ['id'],
-			}).then(users => {
-				this.silencedUsersCache = new Set(users.map(user => user.id));
-			});
-
-			this.find({
-				where: [{
-					isAdmin: true,
-				}, {
-					isModerator: true,
-				}],
-				select: ['id'],
-			}).then(users => {
-				this.moderatorsCache = new Set(users.map(user => user.id));
-			});
-		};
-
-		setImmediate(() => {
-			fetchCache();
-		});
-
-		setInterval(() => {
-			fetchCache();
-		}, 1000 * 60 * 5);
-	}
-
-	public checkSuspended(userId: User['id']): boolean {
-		return this.suspendedUsersCache.has(userId);
-	}
-
-	public checkSilenced(userId: User['id']): boolean {
-		return this.silencedUsersCache.has(userId);
-	}
-
-	public checkModerator(userId: User['id']): boolean {
-		return this.moderatorsCache.has(userId);
-	}
-
 	public async getRelation(me: User['id'], target: User['id']) {
 		const [following1, following2, followReq1, followReq2, toBlocking, fromBlocked, mute] = await Promise.all([
 			Followings.findOne({
diff --git a/packages/backend/src/remote/activitypub/kernel/announce/note.ts b/packages/backend/src/remote/activitypub/kernel/announce/note.ts
index 43585f36c..680749f4d 100644
--- a/packages/backend/src/remote/activitypub/kernel/announce/note.ts
+++ b/packages/backend/src/remote/activitypub/kernel/announce/note.ts
@@ -18,6 +18,10 @@ const logger = apLogger;
 export default async function(resolver: Resolver, actor: CacheableRemoteUser, activity: IAnnounce, targetUri: string): Promise<void> {
 	const uri = getApId(activity);
 
+	if (actor.isSuspended) {
+		return;
+	}
+
 	// アナウンス先をブロックしてたら中断
 	const meta = await fetchMeta();
 	if (meta.blockedHosts.includes(extractDbHost(uri))) return;
diff --git a/packages/backend/src/remote/activitypub/kernel/index.ts b/packages/backend/src/remote/activitypub/kernel/index.ts
index 423a1c773..254a12160 100644
--- a/packages/backend/src/remote/activitypub/kernel/index.ts
+++ b/packages/backend/src/remote/activitypub/kernel/index.ts
@@ -38,7 +38,7 @@ export async function performActivity(actor: CacheableRemoteUser, activity: IObj
 }
 
 async function performOneActivity(actor: CacheableRemoteUser, activity: IObject): Promise<void> {
-	if (Users.checkSuspended(actor.id)) return;
+	if (actor.isSuspended) return;
 
 	if (isCreate(activity)) {
 		await create(actor, activity);
diff --git a/packages/backend/src/remote/activitypub/models/image.ts b/packages/backend/src/remote/activitypub/models/image.ts
index 1bdb769a6..33316dcd9 100644
--- a/packages/backend/src/remote/activitypub/models/image.ts
+++ b/packages/backend/src/remote/activitypub/models/image.ts
@@ -15,7 +15,7 @@ const logger = apLogger;
  */
 export async function createImage(actor: CacheableRemoteUser, value: any): Promise<DriveFile> {
 	// 投稿者が凍結されていたらスキップ
-	if (Users.checkSuspended(actor.id)) {
+	if (actor.isSuspended) {
 		throw new Error('actor has been suspended');
 	}
 
diff --git a/packages/backend/src/remote/activitypub/models/note.ts b/packages/backend/src/remote/activitypub/models/note.ts
index b978798ad..bdcec6b25 100644
--- a/packages/backend/src/remote/activitypub/models/note.ts
+++ b/packages/backend/src/remote/activitypub/models/note.ts
@@ -93,7 +93,7 @@ export async function createNote(value: string | IObject, resolver?: Resolver, s
 	const actor = await resolvePerson(getOneApId(note.attributedTo), resolver) as CacheableRemoteUser;
 
 	// 投稿者が凍結されていたらスキップ
-	if (Users.checkSuspended(actor.id)) {
+	if (actor.isSuspended) {
 		throw new Error('actor has been suspended');
 	}
 
diff --git a/packages/backend/src/server/api/call.ts b/packages/backend/src/server/api/call.ts
index 28b58dd7e..fe9fb352c 100644
--- a/packages/backend/src/server/api/call.ts
+++ b/packages/backend/src/server/api/call.ts
@@ -41,7 +41,7 @@ export default async (endpoint: string, user: CacheableLocalUser | null | undefi
 		});
 	}
 
-	if (ep.meta.requireCredential && Users.checkSuspended(user!.id)) {
+	if (ep.meta.requireCredential && user!.isSuspended) {
 		throw new ApiError({
 			message: 'Your account has been suspended.',
 			code: 'YOUR_ACCOUNT_SUSPENDED',
diff --git a/packages/backend/src/server/api/endpoints/drive/files/delete.ts b/packages/backend/src/server/api/endpoints/drive/files/delete.ts
index 660e757ed..eac8eabfc 100644
--- a/packages/backend/src/server/api/endpoints/drive/files/delete.ts
+++ b/packages/backend/src/server/api/endpoints/drive/files/delete.ts
@@ -42,7 +42,7 @@ export default define(meta, paramDef, async (ps, user) => {
 		throw new ApiError(meta.errors.noSuchFile);
 	}
 
-	if (!Users.checkModerator(user.id) && (file.userId !== user.id)) {
+	if ((!user.isAdmin && !user.isModerator) && (file.userId !== user.id)) {
 		throw new ApiError(meta.errors.accessDenied);
 	}
 
diff --git a/packages/backend/src/server/api/endpoints/drive/files/show.ts b/packages/backend/src/server/api/endpoints/drive/files/show.ts
index fe2d35ed2..16b313cab 100644
--- a/packages/backend/src/server/api/endpoints/drive/files/show.ts
+++ b/packages/backend/src/server/api/endpoints/drive/files/show.ts
@@ -70,7 +70,7 @@ export default define(meta, paramDef, async (ps, user) => {
 		throw new ApiError(meta.errors.noSuchFile);
 	}
 
-	if (!Users.checkModerator(user.id) && (file.userId !== user.id)) {
+	if ((!user.isAdmin && !user.isModerator) && (file.userId !== user.id)) {
 		throw new ApiError(meta.errors.accessDenied);
 	}
 
diff --git a/packages/backend/src/server/api/endpoints/drive/files/update.ts b/packages/backend/src/server/api/endpoints/drive/files/update.ts
index 56d2b385e..30d7847b5 100644
--- a/packages/backend/src/server/api/endpoints/drive/files/update.ts
+++ b/packages/backend/src/server/api/endpoints/drive/files/update.ts
@@ -64,7 +64,7 @@ export default define(meta, paramDef, async (ps, user) => {
 		throw new ApiError(meta.errors.noSuchFile);
 	}
 
-	if (!Users.checkModerator(user.id) && (file.userId !== user.id)) {
+	if ((!user.isAdmin && !user.isModerator) && (file.userId !== user.id)) {
 		throw new ApiError(meta.errors.accessDenied);
 	}
 
diff --git a/packages/backend/src/server/api/endpoints/notes/delete.ts b/packages/backend/src/server/api/endpoints/notes/delete.ts
index c4471f0ab..a1ab06d46 100644
--- a/packages/backend/src/server/api/endpoints/notes/delete.ts
+++ b/packages/backend/src/server/api/endpoints/notes/delete.ts
@@ -48,7 +48,7 @@ export default define(meta, paramDef, async (ps, user) => {
 		throw e;
 	});
 
-	if (!Users.checkModerator(user.id) && (note.userId !== user.id)) {
+	if ((!user.isAdmin && !user.isModerator) && (note.userId !== user.id)) {
 		throw new ApiError(meta.errors.accessDenied);
 	}
 
diff --git a/packages/backend/src/server/api/endpoints/notes/global-timeline.ts b/packages/backend/src/server/api/endpoints/notes/global-timeline.ts
index e60e706fd..09a819466 100644
--- a/packages/backend/src/server/api/endpoints/notes/global-timeline.ts
+++ b/packages/backend/src/server/api/endpoints/notes/global-timeline.ts
@@ -49,7 +49,7 @@ export const paramDef = {
 export default define(meta, paramDef, async (ps, user) => {
 	const m = await fetchMeta();
 	if (m.disableGlobalTimeline) {
-		if (user == null || !Users.checkModerator(user.id)) {
+		if (user == null || (!user.isAdmin && !user.isModerator)) {
 			throw new ApiError(meta.errors.gtlDisabled);
 		}
 	}
diff --git a/packages/backend/src/server/api/endpoints/notes/hybrid-timeline.ts b/packages/backend/src/server/api/endpoints/notes/hybrid-timeline.ts
index 4f3e1d9cc..7c9c12296 100644
--- a/packages/backend/src/server/api/endpoints/notes/hybrid-timeline.ts
+++ b/packages/backend/src/server/api/endpoints/notes/hybrid-timeline.ts
@@ -56,7 +56,7 @@ export const paramDef = {
 // eslint-disable-next-line import/no-default-export
 export default define(meta, paramDef, async (ps, user) => {
 	const m = await fetchMeta();
-	if (m.disableLocalTimeline && !Users.checkModerator(user.id)) {
+	if (m.disableLocalTimeline && (!user.isAdmin && !user.isModerator)) {
 		throw new ApiError(meta.errors.stlDisabled);
 	}
 
diff --git a/packages/backend/src/server/api/endpoints/notes/local-timeline.ts b/packages/backend/src/server/api/endpoints/notes/local-timeline.ts
index be308cd09..bb0bbe2a2 100644
--- a/packages/backend/src/server/api/endpoints/notes/local-timeline.ts
+++ b/packages/backend/src/server/api/endpoints/notes/local-timeline.ts
@@ -55,7 +55,7 @@ export const paramDef = {
 export default define(meta, paramDef, async (ps, user) => {
 	const m = await fetchMeta();
 	if (m.disableLocalTimeline) {
-		if (user == null || !Users.checkModerator(user.id)) {
+		if (user == null || (!user.isAdmin && !user.isModerator)) {
 			throw new ApiError(meta.errors.ltlDisabled);
 		}
 	}
diff --git a/packages/backend/src/server/api/endpoints/users/show.ts b/packages/backend/src/server/api/endpoints/users/show.ts
index d2545ceee..263c102a7 100644
--- a/packages/backend/src/server/api/endpoints/users/show.ts
+++ b/packages/backend/src/server/api/endpoints/users/show.ts
@@ -61,7 +61,7 @@ export const paramDef = {
 export default define(meta, paramDef, async (ps, me) => {
 	let user;
 
-	const isAdminOrModerator = me && Users.checkModerator(me.id);
+	const isAdminOrModerator = me && (me.isAdmin || me.isModerator);
 
 	if (ps.userIds) {
 		if (ps.userIds.length === 0) {
diff --git a/packages/backend/src/services/note/create.ts b/packages/backend/src/services/note/create.ts
index 605f9e54a..98bcc88ec 100644
--- a/packages/backend/src/services/note/create.ts
+++ b/packages/backend/src/services/note/create.ts
@@ -150,7 +150,7 @@ export default async (user: { id: User['id']; username: User['username']; host:
 	if (data.channel != null) data.localOnly = true;
 
 	// サイレンス
-	if (Users.checkSilenced(user.id) && data.visibility === 'public' && data.channel == null) {
+	if (user.isSilenced && data.visibility === 'public' && data.channel == null) {
 		data.visibility = 'home';
 	}