diff --git a/packages/backend/src/server/api/common/generate-muted-instance-query.ts b/packages/backend/src/server/api/common/generate-muted-instance-query.ts
deleted file mode 100644
index d1c5b3765..000000000
--- a/packages/backend/src/server/api/common/generate-muted-instance-query.ts
+++ /dev/null
@@ -1,39 +0,0 @@
-import { User } from '@/models/entities/user.js';
-import { UserProfiles } from '@/models/index.js';
-import { SelectQueryBuilder, Brackets } from 'typeorm';
-
-function createMutesQuery(id: string) {
-	return UserProfiles.createQueryBuilder('user_profile')
-		.select('user_profile.mutedInstances')
-		.where('user_profile.userId = :muterId', { muterId: id });
-}
-
-export function generateMutedInstanceQuery(q: SelectQueryBuilder<any>, me: { id: User['id'] }) {
-	const mutingQuery = createMutesQuery(me.id);
-
-	q
-		.andWhere(new Brackets(qb => { qb
-			.andWhere('note.userHost IS NULL')
-			.orWhere(`NOT((${ mutingQuery.getQuery() })::jsonb ? note.userHost)`);
-		}))
-		.andWhere(new Brackets(qb => { qb
-			.where(`note.replyUserHost IS NULL`)
-			.orWhere(`NOT ((${ mutingQuery.getQuery() })::jsonb ? note.replyUserHost)`);
-		}))
-		.andWhere(new Brackets(qb => { qb
-			.where(`note.renoteUserHost IS NULL`)
-			.orWhere(`NOT ((${ mutingQuery.getQuery() })::jsonb ? note.renoteUserHost)`);
-		}));
-	q.setParameters(mutingQuery.getParameters());
-}
-
-export function generateMutedInstanceNotificationQuery(q: SelectQueryBuilder<any>, me: { id: User['id'] }) {
-	const mutingQuery = createMutesQuery(me.id);
-
-	q.andWhere(new Brackets(qb => { qb 
-		.andWhere('notifier.host IS NULL')
-		.orWhere(`NOT (( ${mutingQuery.getQuery()} )::jsonb ? notifier.host)`);
-	}));
-
-	q.setParameters(mutingQuery.getParameters());
-}
diff --git a/packages/backend/src/server/api/common/generate-muted-user-query.ts b/packages/backend/src/server/api/common/generate-muted-user-query.ts
index 79cb3ff89..e276ff2bd 100644
--- a/packages/backend/src/server/api/common/generate-muted-user-query.ts
+++ b/packages/backend/src/server/api/common/generate-muted-user-query.ts
@@ -1,6 +1,6 @@
-import { User } from '@/models/entities/user.js';
-import { Mutings } from '@/models/index.js';
 import { SelectQueryBuilder, Brackets } from 'typeorm';
+import { User } from '@/models/entities/user.js';
+import { Mutings, UserProfiles } from '@/models/index.js';
 
 export function generateMutedUserQuery(q: SelectQueryBuilder<any>, me: { id: User['id'] }, exclude?: User) {
 	const mutingQuery = Mutings.createQueryBuilder('muting')
@@ -11,21 +11,39 @@ export function generateMutedUserQuery(q: SelectQueryBuilder<any>, me: { id: Use
 		mutingQuery.andWhere('muting.muteeId != :excludeId', { excludeId: exclude.id });
 	}
 
+	const mutingInstanceQuery = UserProfiles.createQueryBuilder('user_profile')
+		.select('user_profile.mutedInstances')
+		.where('user_profile.userId = :muterId', { muterId: me.id });
+
 	// 投稿の作者をミュートしていない かつ
 	// 投稿の返信先の作者をミュートしていない かつ
 	// 投稿の引用元の作者をミュートしていない
 	q
 		.andWhere(`note.userId NOT IN (${ mutingQuery.getQuery() })`)
 		.andWhere(new Brackets(qb => { qb
-			.where(`note.replyUserId IS NULL`)
+			.where('note.replyUserId IS NULL')
 			.orWhere(`note.replyUserId NOT IN (${ mutingQuery.getQuery() })`);
 		}))
 		.andWhere(new Brackets(qb => { qb
-			.where(`note.renoteUserId IS NULL`)
+			.where('note.renoteUserId IS NULL')
 			.orWhere(`note.renoteUserId NOT IN (${ mutingQuery.getQuery() })`);
+		}))
+		// mute instances
+		.andWhere(new Brackets(qb => { qb
+			.andWhere('note.userHost IS NULL')
+			.orWhere(`NOT ((${ mutingInstanceQuery.getQuery() })::jsonb ? note.userHost)`);
+		}))
+		.andWhere(new Brackets(qb => { qb
+			.where('note.replyUserHost IS NULL')
+			.orWhere(`NOT ((${ mutingInstanceQuery.getQuery() })::jsonb ? note.replyUserHost)`);
+		}))
+		.andWhere(new Brackets(qb => { qb
+			.where('note.renoteUserHost IS NULL')
+			.orWhere(`NOT ((${ mutingInstanceQuery.getQuery() })::jsonb ? note.renoteUserHost)`);
 		}));
 
 	q.setParameters(mutingQuery.getParameters());
+	q.setParameters(mutingInstanceQuery.getParameters());
 }
 
 export function generateMutedUserQueryForUsers(q: SelectQueryBuilder<any>, me: { id: User['id'] }) {
@@ -33,8 +51,26 @@ export function generateMutedUserQueryForUsers(q: SelectQueryBuilder<any>, me: {
 		.select('muting.muteeId')
 		.where('muting.muterId = :muterId', { muterId: me.id });
 
+	const mutingInstanceQuery = UserProfiles.createQueryBuilder('user_profile')
+		.select('user_profile.mutedInstances')
+		.where('user_profile.userId = :muterId', { muterId: me.id });
+
 	q
-		.andWhere(`user.id NOT IN (${ mutingQuery.getQuery() })`);
+		.andWhere(`user.id NOT IN (${ mutingQuery.getQuery() })`)
+		// mute instances
+		.andWhere(new Brackets(qb => { qb
+			.andWhere('note.userHost IS NULL')
+			.orWhere(`NOT ((${ mutingInstanceQuery.getQuery() })::jsonb ? note.userHost)`);
+		}))
+		.andWhere(new Brackets(qb => { qb
+			.where('note.replyUserHost IS NULL')
+			.orWhere(`NOT ((${ mutingInstanceQuery.getQuery() })::jsonb ? note.replyUserHost)`);
+		}))
+		.andWhere(new Brackets(qb => { qb
+			.where('note.renoteUserHost IS NULL')
+			.orWhere(`NOT ((${ mutingInstanceQuery.getQuery() })::jsonb ? note.renoteUserHost)`);
+		}));
 
 	q.setParameters(mutingQuery.getParameters());
+	q.setParameters(mutingInstanceQuery.getParameters());
 }
diff --git a/packages/backend/src/server/api/endpoints/i/notifications.ts b/packages/backend/src/server/api/endpoints/i/notifications.ts
index 1c31ce7a6..a2249803e 100644
--- a/packages/backend/src/server/api/endpoints/i/notifications.ts
+++ b/packages/backend/src/server/api/endpoints/i/notifications.ts
@@ -1,11 +1,10 @@
 import { Brackets } from 'typeorm';
-import { Notifications, Followings, Mutings, Users } from '@/models/index.js';
+import { Notifications, Followings, Mutings, Users, UserProfiles } from '@/models/index.js';
 import { notificationTypes } from '@/types.js';
 import read from '@/services/note/read.js';
 import { readNotification } from '../../common/read-notification.js';
 import define from '../../define.js';
 import { makePaginationQuery } from '../../common/make-pagination-query.js';
-import { generateMutedInstanceNotificationQuery } from '../../common/generate-muted-instance-query.js';
 
 export const meta = {
 	tags: ['account', 'notifications'],
@@ -67,6 +66,10 @@ export default define(meta, paramDef, async (ps, user) => {
 		.select('muting.muteeId')
 		.where('muting.muterId = :muterId', { muterId: user.id });
 
+	const mutingInstanceQuery = UserProfiles.createQueryBuilder('user_profile')
+		.select('user_profile.mutedInstances')
+		.where('user_profile.userId = :muterId', { muterId: user.id });
+
 	const suspendedQuery = Users.createQueryBuilder('users')
 		.select('users.id')
 		.where('users.isSuspended = TRUE');
@@ -89,14 +92,21 @@ export default define(meta, paramDef, async (ps, user) => {
 		.leftJoinAndSelect('renoteUser.avatar', 'renoteUserAvatar')
 		.leftJoinAndSelect('renoteUser.banner', 'renoteUserBanner');
 
+	// muted users
 	query.andWhere(new Brackets(qb => { qb
 		.where(`notification.notifierId NOT IN (${ mutingQuery.getQuery() })`)
 		.orWhere('notification.notifierId IS NULL');
 	}));
 	query.setParameters(mutingQuery.getParameters());
 
-	generateMutedInstanceNotificationQuery(query, user);
+	// muted instances
+	query.andWhere(new Brackets(qb => { qb
+		.andWhere('notifier.host IS NULL')
+		.orWhere(`NOT (( ${mutingInstanceQuery.getQuery()} )::jsonb ? notifier.host)`);
+	}));
+	query.setParameters(mutingInstanceQuery.getParameters());
 
+	// suspended users
 	query.andWhere(new Brackets(qb => { qb
 		.where(`notification.notifierId NOT IN (${ suspendedQuery.getQuery() })`)
 		.orWhere('notification.notifierId IS NULL');
diff --git a/packages/backend/src/server/api/endpoints/notes/children.ts b/packages/backend/src/server/api/endpoints/notes/children.ts
index 50ba293a5..efc109105 100644
--- a/packages/backend/src/server/api/endpoints/notes/children.ts
+++ b/packages/backend/src/server/api/endpoints/notes/children.ts
@@ -5,7 +5,6 @@ import { makePaginationQuery } from '../../common/make-pagination-query.js';
 import { generateVisibilityQuery } from '../../common/generate-visibility-query.js';
 import { generateMutedUserQuery } from '../../common/generate-muted-user-query.js';
 import { generateBlockedUserQuery } from '../../common/generate-block-query.js';
-import { generateMutedInstanceQuery } from '../../common/generate-muted-instance-query.js';
 
 export const meta = {
 	tags: ['notes'],
@@ -61,9 +60,10 @@ export default define(meta, paramDef, async (ps, user) => {
 		.leftJoinAndSelect('renoteUser.banner', 'renoteUserBanner');
 
 	generateVisibilityQuery(query, user);
-	if (user) generateMutedUserQuery(query, user);
-	if (user) generateBlockedUserQuery(query, user);
-	if (user) generateMutedInstanceQuery(query, user);
+	if (user) {
+		generateMutedUserQuery(query, user);
+		generateBlockedUserQuery(query, user);
+	}
 
 	const notes = await query.take(ps.limit).getMany();
 
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 fc32bc058..925318f54 100644
--- a/packages/backend/src/server/api/endpoints/notes/global-timeline.ts
+++ b/packages/backend/src/server/api/endpoints/notes/global-timeline.ts
@@ -5,7 +5,6 @@ import define from '../../define.js';
 import { ApiError } from '../../error.js';
 import { makePaginationQuery } from '../../common/make-pagination-query.js';
 import { generateMutedUserQuery } from '../../common/generate-muted-user-query.js';
-import { generateMutedInstanceQuery } from '../../common/generate-muted-instance-query.js';
 import { generateRepliesQuery } from '../../common/generate-replies-query.js';
 import { generateMutedNoteQuery } from '../../common/generate-muted-note-query.js';
 import { generateBlockedUserQuery } from '../../common/generate-block-query.js';
@@ -76,10 +75,11 @@ export default define(meta, paramDef, async (ps, user) => {
 		.leftJoinAndSelect('renoteUser.banner', 'renoteUserBanner');
 
 	generateRepliesQuery(query, user);
-	if (user) generateMutedUserQuery(query, user);
-	if (user) generateMutedNoteQuery(query, user);
-	if (user) generateBlockedUserQuery(query, user);
-	if (user) generateMutedInstanceQuery(query, user);
+	if (user) {
+		generateMutedUserQuery(query, user);
+		generateMutedNoteQuery(query, user);
+		generateBlockedUserQuery(query, user);
+	}
 
 	if (ps.withFiles) {
 		query.andWhere('note.fileIds != \'{}\'');
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 5f956135d..2dc98c4c9 100644
--- a/packages/backend/src/server/api/endpoints/notes/hybrid-timeline.ts
+++ b/packages/backend/src/server/api/endpoints/notes/hybrid-timeline.ts
@@ -7,7 +7,6 @@ import { ApiError } from '../../error.js';
 import { makePaginationQuery } from '../../common/make-pagination-query.js';
 import { generateVisibilityQuery } from '../../common/generate-visibility-query.js';
 import { generateMutedUserQuery } from '../../common/generate-muted-user-query.js';
-import { generateMutedInstanceQuery } from '../../common/generate-muted-instance-query.js';
 import { generateRepliesQuery } from '../../common/generate-replies-query.js';
 import { generateMutedNoteQuery } from '../../common/generate-muted-note-query.js';
 import { generateChannelQuery } from '../../common/generate-channel-query.js';
@@ -92,7 +91,6 @@ export default define(meta, paramDef, async (ps, user) => {
 	generateRepliesQuery(query, user);
 	generateVisibilityQuery(query, user);
 	generateMutedUserQuery(query, user);
-	generateMutedInstanceQuery(query, user);
 	generateMutedNoteQuery(query, user);
 	generateBlockedUserQuery(query, user);
 
@@ -134,9 +132,7 @@ export default define(meta, paramDef, async (ps, user) => {
 	const timeline = await query.take(ps.limit).getMany();
 
 	process.nextTick(() => {
-		if (user) {
-			activeUsersChart.read(user);
-		}
+		activeUsersChart.read(user);
 	});
 
 	return await Notes.packMany(timeline, user);
diff --git a/packages/backend/src/server/api/endpoints/notes/timeline.ts b/packages/backend/src/server/api/endpoints/notes/timeline.ts
index d80940e95..22f492517 100644
--- a/packages/backend/src/server/api/endpoints/notes/timeline.ts
+++ b/packages/backend/src/server/api/endpoints/notes/timeline.ts
@@ -5,7 +5,6 @@ import define from '../../define.js';
 import { makePaginationQuery } from '../../common/make-pagination-query.js';
 import { generateVisibilityQuery } from '../../common/generate-visibility-query.js';
 import { generateMutedUserQuery } from '../../common/generate-muted-user-query.js';
-import { generateMutedInstanceQuery } from '../../common/generate-muted-instance-query.js';
 import { generateRepliesQuery } from '../../common/generate-replies-query.js';
 import { generateMutedNoteQuery } from '../../common/generate-muted-note-query.js';
 import { generateChannelQuery } from '../../common/generate-channel-query.js';
@@ -84,7 +83,6 @@ export default define(meta, paramDef, async (ps, user) => {
 	generateRepliesQuery(query, user);
 	generateVisibilityQuery(query, user);
 	generateMutedUserQuery(query, user);
-	generateMutedInstanceQuery(query, user);
 	generateMutedNoteQuery(query, user);
 	generateBlockedUserQuery(query, user);
 
@@ -126,9 +124,7 @@ export default define(meta, paramDef, async (ps, user) => {
 	const timeline = await query.take(ps.limit).getMany();
 
 	process.nextTick(() => {
-		if (user) {
-			activeUsersChart.read(user);
-		}
+		activeUsersChart.read(user);
 	});
 
 	return await Notes.packMany(timeline, user);
diff --git a/packages/backend/src/server/api/endpoints/users/notes.ts b/packages/backend/src/server/api/endpoints/users/notes.ts
index aec5c0ea9..9fa56fe83 100644
--- a/packages/backend/src/server/api/endpoints/users/notes.ts
+++ b/packages/backend/src/server/api/endpoints/users/notes.ts
@@ -7,7 +7,6 @@ import { makePaginationQuery } from '../../common/make-pagination-query.js';
 import { generateVisibilityQuery } from '../../common/generate-visibility-query.js';
 import { generateMutedUserQuery } from '../../common/generate-muted-user-query.js';
 import { generateBlockedUserQuery } from '../../common/generate-block-query.js';
-import { generateMutedInstanceQuery } from '../../common/generate-muted-instance-query.js';
 
 export const meta = {
 	tags: ['users', 'notes'],
@@ -77,9 +76,10 @@ export default define(meta, paramDef, async (ps, me) => {
 		.leftJoinAndSelect('renoteUser.banner', 'renoteUserBanner');
 
 	generateVisibilityQuery(query, me);
-	if (me) generateMutedUserQuery(query, me, user);
-	if (me) generateBlockedUserQuery(query, me);
-	if (me) generateMutedInstanceQuery(query, me);
+	if (me) {
+		generateMutedUserQuery(query, me, user);
+		generateBlockedUserQuery(query, me);
+	}
 
 	if (ps.withFiles) {
 		query.andWhere('note.fileIds != \'{}\'');