diff --git a/packages/backend/src/server/api/endpoints/users/followers.ts b/packages/backend/src/server/api/endpoints/users/followers.ts
index 84c4c80d01..3c55026208 100644
--- a/packages/backend/src/server/api/endpoints/users/followers.ts
+++ b/packages/backend/src/server/api/endpoints/users/followers.ts
@@ -3,7 +3,7 @@
  * SPDX-License-Identifier: AGPL-3.0-only
  */
 
-import { IsNull } from 'typeorm';
+import { Brackets, IsNull } from 'typeorm';
 import { Inject, Injectable } from '@nestjs/common';
 import type { UsersRepository, FollowingsRepository, UserProfilesRepository } from '@/models/_.js';
 import { Endpoint } from '@/server/api/endpoint-base.js';
@@ -12,6 +12,8 @@ import { FollowingEntityService } from '@/core/entities/FollowingEntityService.j
 import { UtilityService } from '@/core/UtilityService.js';
 import { DI } from '@/di-symbols.js';
 import { RoleService } from '@/core/RoleService.js';
+import { sqlLikeEscape } from '@/misc/sql-like-escape.js';
+import { UserEntityService } from '@/core/entities/UserEntityService.js';
 import { ApiError } from '../../error.js';
 
 export const meta = {
@@ -79,6 +81,7 @@ export const paramDef = {
 				sinceDate: { type: 'integer' },
 				untilDate: { type: 'integer' },
 				limit: { type: 'integer', minimum: 1, maximum: 100, default: 10 },
+				query: { type: 'string', nullable: true },
 			},
 		},
 	],
@@ -100,6 +103,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 		private followingEntityService: FollowingEntityService,
 		private queryService: QueryService,
 		private roleService: RoleService,
+		private userEntityService: UserEntityService,
 	) {
 		super(meta, paramDef, async (ps, me) => {
 			const user = await this.usersRepository.findOneBy('userId' in ps
@@ -138,6 +142,21 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 				.andWhere('following.followeeId = :userId', { userId: user.id })
 				.innerJoinAndSelect('following.follower', 'follower');
 
+			if (ps.query) {
+				const searchQuery = ps.query;
+				const isUsername = searchQuery.startsWith('@') && !searchQuery.includes(' ') && searchQuery.indexOf('@', 1) === -1;
+
+				query.andWhere(new Brackets(qb => {
+					qb.where('follower.name ILIKE :query', { query: '%' + sqlLikeEscape(searchQuery) + '%' });
+
+					if (isUsername) {
+						qb.orWhere('follower.usernameLower LIKE :username', { username: sqlLikeEscape(searchQuery.replace('@', '').toLowerCase()) + '%' });
+					} else if (this.userEntityService.validateLocalUsername(searchQuery)) {
+						qb.orWhere('follower.usernameLower LIKE :username', { username: '%' + sqlLikeEscape(searchQuery.toLowerCase()) + '%' });
+					}
+				}));
+			}
+
 			const followings = await query
 				.limit(ps.limit)
 				.getMany();
diff --git a/packages/backend/src/server/api/endpoints/users/following.ts b/packages/backend/src/server/api/endpoints/users/following.ts
index 047f9a053b..6697e2d09d 100644
--- a/packages/backend/src/server/api/endpoints/users/following.ts
+++ b/packages/backend/src/server/api/endpoints/users/following.ts
@@ -3,7 +3,7 @@
  * SPDX-License-Identifier: AGPL-3.0-only
  */
 
-import { IsNull } from 'typeorm';
+import { Brackets, IsNull } from 'typeorm';
 import { Inject, Injectable } from '@nestjs/common';
 import type { UsersRepository, FollowingsRepository, UserProfilesRepository } from '@/models/_.js';
 import { birthdaySchema } from '@/models/User.js';
@@ -13,6 +13,8 @@ import { FollowingEntityService } from '@/core/entities/FollowingEntityService.j
 import { UtilityService } from '@/core/UtilityService.js';
 import { DI } from '@/di-symbols.js';
 import { RoleService } from '@/core/RoleService.js';
+import { sqlLikeEscape } from '@/misc/sql-like-escape.js';
+import { UserEntityService } from '@/core/entities/UserEntityService.js';
 import { ApiError } from '../../error.js';
 
 export const meta = {
@@ -87,6 +89,7 @@ export const paramDef = {
 				untilDate: { type: 'integer' },
 				limit: { type: 'integer', minimum: 1, maximum: 100, default: 10 },
 				birthday: { ...birthdaySchema, nullable: true },
+				query: { type: 'string', nullable: true },
 			},
 		},
 	],
@@ -108,6 +111,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 		private followingEntityService: FollowingEntityService,
 		private queryService: QueryService,
 		private roleService: RoleService,
+		private userEntityService: UserEntityService,
 	) {
 		super(meta, paramDef, async (ps, me) => {
 			const user = await this.usersRepository.findOneBy('userId' in ps
@@ -146,7 +150,21 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 				.andWhere('following.followerId = :userId', { userId: user.id })
 				.innerJoinAndSelect('following.followee', 'followee');
 
-			if (ps.birthday) {
+			// query takes priority over birthday
+			if (ps.query) {
+				const searchQuery = ps.query;
+				const isUsername = searchQuery.startsWith('@') && !searchQuery.includes(' ') && searchQuery.indexOf('@', 1) === -1;
+
+				query.andWhere(new Brackets(qb => {
+					qb.where('followee.name ILIKE :query', { query: '%' + sqlLikeEscape(searchQuery) + '%' });
+
+					if (isUsername) {
+						qb.orWhere('followee.usernameLower LIKE :username', { username: sqlLikeEscape(searchQuery.replace('@', '').toLowerCase()) + '%' });
+					} else if (this.userEntityService.validateLocalUsername(searchQuery)) {
+						qb.orWhere('followee.usernameLower LIKE :username', { username: '%' + sqlLikeEscape(searchQuery.toLowerCase()) + '%' });
+					}
+				}));
+			} else if (ps.birthday) {
 				try {
 					const birthday = ps.birthday.substring(5, 10);
 					const birthdayUserQuery = this.userProfilesRepository.createQueryBuilder('user_profile');
diff --git a/packages/frontend/src/pages/user/follow-list.vue b/packages/frontend/src/pages/user/follow-list.vue
index c383b9b7bd..0b13d8e6cb 100644
--- a/packages/frontend/src/pages/user/follow-list.vue
+++ b/packages/frontend/src/pages/user/follow-list.vue
@@ -30,6 +30,8 @@ const followingPaginator = markRaw(new Paginator('users/following', {
 	computedParams: computed(() => ({
 		userId: props.user.id,
 	})),
+	canSearch: true,
+	searchParamName: 'query',
 }));
 
 const followersPaginator = markRaw(new Paginator('users/followers', {
@@ -37,6 +39,8 @@ const followersPaginator = markRaw(new Paginator('users/followers', {
 	computedParams: computed(() => ({
 		userId: props.user.id,
 	})),
+	canSearch: true,
+	searchParamName: 'query',
 }));
 </script>
 
diff --git a/packages/misskey-js/src/autogen/types.ts b/packages/misskey-js/src/autogen/types.ts
index 2650869590..254f1bcd73 100644
--- a/packages/misskey-js/src/autogen/types.ts
+++ b/packages/misskey-js/src/autogen/types.ts
@@ -34768,6 +34768,7 @@ export interface operations {
                     untilDate?: number;
                     /** @default 10 */
                     limit?: number;
+                    query?: string | null;
                 };
             };
         };
@@ -34848,6 +34849,7 @@ export interface operations {
                     /** @default 10 */
                     limit?: number;
                     birthday?: string | null;
+                    query?: string | null;
                 };
             };
         };