merge: latest changes

48 files changed, 148 insertions, 102 deletions

diff --git a/packages/backend/src/core/CustomEmojiService.ts b/packages/backend/src/core/CustomEmojiService.ts
index 5a1fe3d089..1de71212e9 100644
--- a/packages/backend/src/core/CustomEmojiService.ts
+++ b/packages/backend/src/core/CustomEmojiService.ts
@@ -408,7 +408,7 @@ export class CustomEmojiService implements OnApplicationShutdown {
 	 */
 	@bindThis
 	public checkDuplicate(name: string): Promise<boolean> {
-		return this.emojisRepository.exist({ where: { name, host: IsNull() } });
+		return this.emojisRepository.exists({ where: { name, host: IsNull() } });
 	}
 
 	@bindThis
diff --git a/packages/backend/src/core/HashtagService.ts b/packages/backend/src/core/HashtagService.ts
index 5a2417c9cd..712530108e 100644
--- a/packages/backend/src/core/HashtagService.ts
+++ b/packages/backend/src/core/HashtagService.ts
@@ -163,7 +163,7 @@ export class HashtagService {
 		const instance = await this.metaService.fetch();
 		const hiddenTags = instance.hiddenTags.map(t => normalizeForSearch(t));
 		if (hiddenTags.includes(hashtag)) return;
-		if (this.utilityService.isSensitiveWordIncluded(hashtag, instance.sensitiveWords)) return;
+		if (this.utilityService.isKeyWordIncluded(hashtag, instance.sensitiveWords)) return;
 
 		// YYYYMMDDHHmm (10分間隔)
 		const now = new Date();
diff --git a/packages/backend/src/core/NoteCreateService.ts b/packages/backend/src/core/NoteCreateService.ts
index 2848be9fe1..34f3736446 100644
--- a/packages/backend/src/core/NoteCreateService.ts
+++ b/packages/backend/src/core/NoteCreateService.ts
@@ -153,6 +153,8 @@ type Option = {
 export class NoteCreateService implements OnApplicationShutdown {
 	#shutdownController = new AbortController();
 
+	public static ContainsProhibitedWordsError = class extends Error {};
+
 	constructor(
 		@Inject(DI.config)
 		private config: Config,
@@ -429,13 +431,19 @@ export class NoteCreateService implements OnApplicationShutdown {
 
 		if (data.visibility === 'public' && data.channel == null) {
 			const sensitiveWords = meta.sensitiveWords;
-			if (this.utilityService.isSensitiveWordIncluded(data.cw ?? data.text ?? '', sensitiveWords)) {
+			if (this.utilityService.isKeyWordIncluded(data.cw ?? data.text ?? '', sensitiveWords)) {
 				data.visibility = 'home';
 			} else if ((await this.roleService.getUserPolicies(user.id)).canPublicNote === false) {
 				data.visibility = 'home';
 			}
 		}
 
+		if (!user.host) {
+			if (this.utilityService.isKeyWordIncluded(data.cw ?? data.text ?? '', meta.prohibitedWords)) {
+				throw new NoteCreateService.ContainsProhibitedWordsError();
+			}
+		}
+
 		const inSilencedInstance = this.utilityService.isSilencedHost(meta.silencedHosts, user.host);
 
 		if (data.visibility === 'public' && inSilencedInstance && user.host !== null) {
@@ -795,7 +803,7 @@ export class NoteCreateService implements OnApplicationShutdown {
 				});
 				// 通知
 				if (data.reply.userHost === null) {
-					const isThreadMuted = await this.noteThreadMutingsRepository.exist({
+					const isThreadMuted = await this.noteThreadMutingsRepository.exists({
 						where: {
 							userId: data.reply.userId,
 							threadId: data.reply.threadId ?? data.reply.id,
@@ -830,7 +838,7 @@ export class NoteCreateService implements OnApplicationShutdown {
 
 				// Notify
 				if (data.renote.userHost === null) {
-					const isThreadMuted = await this.noteThreadMutingsRepository.exist({
+					const isThreadMuted = await this.noteThreadMutingsRepository.exists({
 						where: {
 							userId: data.renote.userId,
 							threadId: data.renote.threadId ?? data.renote.id,
@@ -1057,7 +1065,7 @@ export class NoteCreateService implements OnApplicationShutdown {
 	@bindThis
 	private async createMentionedEvents(mentionedUsers: MinimumUser[], note: MiNote, nm: NotificationManager) {
 		for (const u of mentionedUsers.filter(u => this.userEntityService.isLocalUser(u))) {
-			const isThreadMuted = await this.noteThreadMutingsRepository.exist({
+			const isThreadMuted = await this.noteThreadMutingsRepository.exists({
 				where: {
 					userId: u.id,
 					threadId: note.threadId ?? note.id,
diff --git a/packages/backend/src/core/NoteEditService.ts b/packages/backend/src/core/NoteEditService.ts
index 98762f790e..a6f7edb05c 100644
--- a/packages/backend/src/core/NoteEditService.ts
+++ b/packages/backend/src/core/NoteEditService.ts
@@ -612,7 +612,7 @@ export class NoteEditService implements OnApplicationShutdown {
 			if (data.reply) {
 				// 通知
 				if (data.reply.userHost === null) {
-					const isThreadMuted = await this.noteThreadMutingsRepository.exist({
+					const isThreadMuted = await this.noteThreadMutingsRepository.exists({
 						where: {
 							userId: data.reply.userId,
 							threadId: data.reply.threadId ?? data.reply.id,
@@ -647,7 +647,7 @@ export class NoteEditService implements OnApplicationShutdown {
 
 				// Notify
 				if (data.renote.userHost === null) {
-					const isThreadMuted = await this.noteThreadMutingsRepository.exist({
+					const isThreadMuted = await this.noteThreadMutingsRepository.exists({
 						where: {
 							userId: data.renote.userId,
 							threadId: data.renote.threadId ?? data.renote.id,
@@ -751,7 +751,7 @@ export class NoteEditService implements OnApplicationShutdown {
 	@bindThis
 	private async createMentionedEvents(mentionedUsers: MinimumUser[], note: MiNote, nm: NotificationManager) {
 		for (const u of mentionedUsers.filter(u => this.userEntityService.isLocalUser(u))) {
-			const isThreadMuted = await this.noteThreadMutingsRepository.exist({
+			const isThreadMuted = await this.noteThreadMutingsRepository.exists({
 				where: {
 					userId: u.id,
 					threadId: note.threadId ?? note.id,
diff --git a/packages/backend/src/core/NoteReadService.ts b/packages/backend/src/core/NoteReadService.ts
index c73cf76592..11791a4412 100644
--- a/packages/backend/src/core/NoteReadService.ts
+++ b/packages/backend/src/core/NoteReadService.ts
@@ -49,7 +49,7 @@ export class NoteReadService implements OnApplicationShutdown {
 		//#endregion
 
 		// スレッドミュート
-		const isThreadMuted = await this.noteThreadMutingsRepository.exist({
+		const isThreadMuted = await this.noteThreadMutingsRepository.exists({
 			where: {
 				userId: userId,
 				threadId: note.threadId ?? note.id,
@@ -70,7 +70,7 @@ export class NoteReadService implements OnApplicationShutdown {
 
 		// 2秒経っても既読にならなかったら「未読の投稿がありますよ」イベントを発行する
 		setTimeout(2000, 'unread note', { signal: this.#shutdownController.signal }).then(async () => {
-			const exist = await this.noteUnreadsRepository.exist({ where: { id: unread.id } });
+			const exist = await this.noteUnreadsRepository.exists({ where: { id: unread.id } });
 
 			if (!exist) return;
 
diff --git a/packages/backend/src/core/ReactionService.ts b/packages/backend/src/core/ReactionService.ts
index 11c972982e..6cce4a61ea 100644
--- a/packages/backend/src/core/ReactionService.ts
+++ b/packages/backend/src/core/ReactionService.ts
@@ -248,7 +248,7 @@ export class ReactionService {
 
 		// リアクションされたユーザーがローカルユーザーなら通知を作成
 		if (note.userHost === null) {
-			const isThreadMuted = await this.noteThreadMutingsRepository.exist({
+			const isThreadMuted = await this.noteThreadMutingsRepository.exists({
 				where: {
 					userId: note.userId,
 					threadId: note.threadId ?? note.id,
diff --git a/packages/backend/src/core/SignupService.ts b/packages/backend/src/core/SignupService.ts
index 6b8c64488f..5941944a20 100644
--- a/packages/backend/src/core/SignupService.ts
+++ b/packages/backend/src/core/SignupService.ts
@@ -77,12 +77,12 @@ export class SignupService {
 		const secret = generateUserToken();
 
 		// Check username duplication
-		if (await this.usersRepository.exist({ where: { usernameLower: username.toLowerCase(), host: IsNull() } })) {
+		if (await this.usersRepository.exists({ where: { usernameLower: username.toLowerCase(), host: IsNull() } })) {
 			throw new Error('DUPLICATED_USERNAME');
 		}
 
 		// Check deleted username duplication
-		if (await this.usedUsernamesRepository.exist({ where: { username: username.toLowerCase() } })) {
+		if (await this.usedUsernamesRepository.exists({ where: { username: username.toLowerCase() } })) {
 			throw new Error('USED_USERNAME');
 		}
 
diff --git a/packages/backend/src/core/UserFollowingService.ts b/packages/backend/src/core/UserFollowingService.ts
index 93e9fbbd70..e82a7e06f9 100644
--- a/packages/backend/src/core/UserFollowingService.ts
+++ b/packages/backend/src/core/UserFollowingService.ts
@@ -144,7 +144,7 @@ export class UserFollowingService implements OnModuleInit {
 			let autoAccept = false;
 
 			// 鍵アカウントであっても、既にフォローされていた場合はスルー
-			const isFollowing = await this.followingsRepository.exist({
+			const isFollowing = await this.followingsRepository.exists({
 				where: {
 					followerId: follower.id,
 					followeeId: followee.id,
@@ -156,7 +156,7 @@ export class UserFollowingService implements OnModuleInit {
 
 			// フォローしているユーザーは自動承認オプション
 			if (!autoAccept && (this.userEntityService.isLocalUser(followee) && followeeProfile.autoAcceptFollowed)) {
-				const isFollowed = await this.followingsRepository.exist({
+				const isFollowed = await this.followingsRepository.exists({
 					where: {
 						followerId: followee.id,
 						followeeId: follower.id,
@@ -170,7 +170,7 @@ export class UserFollowingService implements OnModuleInit {
 			if (followee.isLocked && !autoAccept) {
 				autoAccept = !!(await this.accountMoveService.validateAlsoKnownAs(
 					follower,
-					(oldSrc, newSrc) => this.followingsRepository.exist({
+					(oldSrc, newSrc) => this.followingsRepository.exists({
 						where: {
 							followeeId: followee.id,
 							followerId: newSrc.id,
@@ -233,7 +233,7 @@ export class UserFollowingService implements OnModuleInit {
 
 		this.cacheService.userFollowingsCache.refresh(follower.id);
 
-		const requestExist = await this.followRequestsRepository.exist({
+		const requestExist = await this.followRequestsRepository.exists({
 			where: {
 				followeeId: followee.id,
 				followerId: follower.id,
@@ -531,7 +531,7 @@ export class UserFollowingService implements OnModuleInit {
 			}
 		}
 
-		const requestExist = await this.followRequestsRepository.exist({
+		const requestExist = await this.followRequestsRepository.exists({
 			where: {
 				followeeId: followee.id,
 				followerId: follower.id,
diff --git a/packages/backend/src/core/UtilityService.ts b/packages/backend/src/core/UtilityService.ts
index 5dec36c89e..15b98abe63 100644
--- a/packages/backend/src/core/UtilityService.ts
+++ b/packages/backend/src/core/UtilityService.ts
@@ -43,13 +43,13 @@ export class UtilityService {
 	}
 
 	@bindThis
-	public isSensitiveWordIncluded(text: string, sensitiveWords: string[]): boolean {
-		if (sensitiveWords.length === 0) return false;
+	public isKeyWordIncluded(text: string, keyWords: string[]): boolean {
+		if (keyWords.length === 0) return false;
 		if (text === '') return false;
 
 		const regexpregexp = /^\/(.+)\/(.*)$/;
 
-		const matched = sensitiveWords.some(filter => {
+		const matched = keyWords.some(filter => {
 			// represents RegExp
 			const regexp = filter.match(regexpregexp);
 			// This should never happen due to input sanitisation.
diff --git a/packages/backend/src/core/activitypub/ApInboxService.ts b/packages/backend/src/core/activitypub/ApInboxService.ts
index 3f01c0289a..acbe59b8bd 100644
--- a/packages/backend/src/core/activitypub/ApInboxService.ts
+++ b/packages/backend/src/core/activitypub/ApInboxService.ts
@@ -629,7 +629,7 @@ export class ApInboxService {
 			return 'skip: follower not found';
 		}
 
-		const isFollowing = await this.followingsRepository.exist({
+		const isFollowing = await this.followingsRepository.exists({
 			where: {
 				followerId: follower.id,
 				followeeId: actor.id,
@@ -686,14 +686,14 @@ export class ApInboxService {
 			return 'skip: フォロー解除しようとしているユーザーはローカルユーザーではありません';
 		}
 
-		const requestExist = await this.followRequestsRepository.exist({
+		const requestExist = await this.followRequestsRepository.exists({
 			where: {
 				followerId: actor.id,
 				followeeId: followee.id,
 			},
 		});
 
-		const isFollowing = await this.followingsRepository.exist({
+		const isFollowing = await this.followingsRepository.exists({
 			where: {
 				followerId: actor.id,
 				followeeId: followee.id,
diff --git a/packages/backend/src/core/activitypub/ApRendererService.ts b/packages/backend/src/core/activitypub/ApRendererService.ts
index be3ebbaf96..e07bb8be78 100644
--- a/packages/backend/src/core/activitypub/ApRendererService.ts
+++ b/packages/backend/src/core/activitypub/ApRendererService.ts
@@ -345,7 +345,7 @@ export class ApRendererService {
 			inReplyToNote = await this.notesRepository.findOneBy({ id: note.replyId });
 
 			if (inReplyToNote != null) {
-				const inReplyToUserExist = await this.usersRepository.exist({ where: { id: inReplyToNote.userId } });
+				const inReplyToUserExist = await this.usersRepository.exists({ where: { id: inReplyToNote.userId } });
 
 				if (inReplyToUserExist) {
 					if (inReplyToNote.uri) {
@@ -636,7 +636,7 @@ export class ApRendererService {
 			inReplyToNote = await this.notesRepository.findOneBy({ id: note.replyId });
 
 			if (inReplyToNote != null) {
-				const inReplyToUserExist = await this.usersRepository.exist({ where: { id: inReplyToNote.userId } });
+				const inReplyToUserExist = await this.usersRepository.exists({ where: { id: inReplyToNote.userId } });
 
 				if (inReplyToUserExist) {
 					if (inReplyToNote.uri) {
diff --git a/packages/backend/src/core/entities/ChannelEntityService.ts b/packages/backend/src/core/entities/ChannelEntityService.ts
index 305946b8a6..f358875f72 100644
--- a/packages/backend/src/core/entities/ChannelEntityService.ts
+++ b/packages/backend/src/core/entities/ChannelEntityService.ts
@@ -51,14 +51,14 @@ export class ChannelEntityService {
 
 		const banner = channel.bannerId ? await this.driveFilesRepository.findOneBy({ id: channel.bannerId }) : null;
 
-		const isFollowing = meId ? await this.channelFollowingsRepository.exist({
+		const isFollowing = meId ? await this.channelFollowingsRepository.exists({
 			where: {
 				followerId: meId,
 				followeeId: channel.id,
 			},
 		}) : false;
 
-		const isFavorited = meId ? await this.channelFavoritesRepository.exist({
+		const isFavorited = meId ? await this.channelFavoritesRepository.exists({
 			where: {
 				userId: meId,
 				channelId: channel.id,
diff --git a/packages/backend/src/core/entities/ClipEntityService.ts b/packages/backend/src/core/entities/ClipEntityService.ts
index 96422894fd..2133f80f1a 100644
--- a/packages/backend/src/core/entities/ClipEntityService.ts
+++ b/packages/backend/src/core/entities/ClipEntityService.ts
@@ -46,7 +46,7 @@ export class ClipEntityService {
 			description: clip.description,
 			isPublic: clip.isPublic,
 			favoritedCount: await this.clipFavoritesRepository.countBy({ clipId: clip.id }),
-			isFavorited: meId ? await this.clipFavoritesRepository.exist({ where: { clipId: clip.id, userId: meId } }) : undefined,
+			isFavorited: meId ? await this.clipFavoritesRepository.exists({ where: { clipId: clip.id, userId: meId } }) : undefined,
 		});
 	}
 
diff --git a/packages/backend/src/core/entities/FlashEntityService.ts b/packages/backend/src/core/entities/FlashEntityService.ts
index 70faa2b380..c1b9f9a791 100644
--- a/packages/backend/src/core/entities/FlashEntityService.ts
+++ b/packages/backend/src/core/entities/FlashEntityService.ts
@@ -47,7 +47,7 @@ export class FlashEntityService {
 			summary: flash.summary,
 			script: flash.script,
 			likedCount: flash.likedCount,
-			isLiked: meId ? await this.flashLikesRepository.exist({ where: { flashId: flash.id, userId: meId } }) : undefined,
+			isLiked: meId ? await this.flashLikesRepository.exists({ where: { flashId: flash.id, userId: meId } }) : undefined,
 		});
 	}
 
diff --git a/packages/backend/src/core/entities/GalleryPostEntityService.ts b/packages/backend/src/core/entities/GalleryPostEntityService.ts
index d7b960e0d9..2a615a9216 100644
--- a/packages/backend/src/core/entities/GalleryPostEntityService.ts
+++ b/packages/backend/src/core/entities/GalleryPostEntityService.ts
@@ -53,7 +53,7 @@ export class GalleryPostEntityService {
 			tags: post.tags.length > 0 ? post.tags : undefined,
 			isSensitive: post.isSensitive,
 			likedCount: post.likedCount,
-			isLiked: meId ? await this.galleryLikesRepository.exist({ where: { postId: post.id, userId: meId } }) : undefined,
+			isLiked: meId ? await this.galleryLikesRepository.exists({ where: { postId: post.id, userId: meId } }) : undefined,
 		});
 	}
 
diff --git a/packages/backend/src/core/entities/NoteEntityService.ts b/packages/backend/src/core/entities/NoteEntityService.ts
index 1cbd5cb70c..a59de4985c 100644
--- a/packages/backend/src/core/entities/NoteEntityService.ts
+++ b/packages/backend/src/core/entities/NoteEntityService.ts
@@ -114,7 +114,7 @@ export class NoteEntityService implements OnModuleInit {
 				hide = false;
 			} else {
 				if (packedNote.renote) {
-					const isFollowing = await this.followingsRepository.exist({
+					const isFollowing = await this.followingsRepository.exists({
 						where: {
 							followeeId: packedNote.renote.userId,
 							followerId: meId,
@@ -124,7 +124,7 @@ export class NoteEntityService implements OnModuleInit {
 					hide = !isFollowing;
 				} else {
 					// フォロワーかどうか
-					const isFollowing = await this.followingsRepository.exist({
+					const isFollowing = await this.followingsRepository.exists({
 						where: {
 							followeeId: packedNote.userId,
 							followerId: meId,
diff --git a/packages/backend/src/core/entities/PageEntityService.ts b/packages/backend/src/core/entities/PageEntityService.ts
index bc26362aba..27c9011f6d 100644
--- a/packages/backend/src/core/entities/PageEntityService.ts
+++ b/packages/backend/src/core/entities/PageEntityService.ts
@@ -104,7 +104,7 @@ export class PageEntityService {
 			eyeCatchingImage: page.eyeCatchingImageId ? await this.driveFileEntityService.pack(page.eyeCatchingImageId) : null,
 			attachedFiles: this.driveFileEntityService.packMany((await Promise.all(attachedFiles)).filter((x): x is MiDriveFile => x != null)),
 			likedCount: page.likedCount,
-			isLiked: meId ? await this.pageLikesRepository.exist({ where: { pageId: page.id, userId: meId } }) : undefined,
+			isLiked: meId ? await this.pageLikesRepository.exists({ where: { pageId: page.id, userId: meId } }) : undefined,
 		});
 	}
 
diff --git a/packages/backend/src/core/entities/UserEntityService.ts b/packages/backend/src/core/entities/UserEntityService.ts
index 6c1a02d9d8..d24d97ed17 100644
--- a/packages/backend/src/core/entities/UserEntityService.ts
+++ b/packages/backend/src/core/entities/UserEntityService.ts
@@ -153,43 +153,43 @@ export class UserEntityService implements OnModuleInit {
 				followerId: me,
 				followeeId: target,
 			}),
-			this.followingsRepository.exist({
+			this.followingsRepository.exists({
 				where: {
 					followerId: target,
 					followeeId: me,
 				},
 			}),
-			this.followRequestsRepository.exist({
+			this.followRequestsRepository.exists({
 				where: {
 					followerId: me,
 					followeeId: target,
 				},
 			}),
-			this.followRequestsRepository.exist({
+			this.followRequestsRepository.exists({
 				where: {
 					followerId: target,
 					followeeId: me,
 				},
 			}),
-			this.blockingsRepository.exist({
+			this.blockingsRepository.exists({
 				where: {
 					blockerId: me,
 					blockeeId: target,
 				},
 			}),
-			this.blockingsRepository.exist({
+			this.blockingsRepository.exists({
 				where: {
 					blockerId: target,
 					blockeeId: me,
 				},
 			}),
-			this.mutingsRepository.exist({
+			this.mutingsRepository.exists({
 				where: {
 					muterId: me,
 					muteeId: target,
 				},
 			}),
-			this.renoteMutingsRepository.exist({
+			this.renoteMutingsRepository.exists({
 				where: {
 					muterId: me,
 					muteeId: target,
@@ -216,7 +216,7 @@ export class UserEntityService implements OnModuleInit {
 		/*
 		const myAntennas = (await this.antennaService.getAntennas()).filter(a => a.userId === userId);
 
-		const isUnread = (myAntennas.length > 0 ? await this.antennaNotesRepository.exist({
+		const isUnread = (myAntennas.length > 0 ? await this.antennaNotesRepository.exists({
 			where: {
 				antennaId: In(myAntennas.map(x => x.id)),
 				read: false,
diff --git a/packages/backend/src/models/Meta.ts b/packages/backend/src/models/Meta.ts
index 9629012c74..149955aa5a 100644
--- a/packages/backend/src/models/Meta.ts
+++ b/packages/backend/src/models/Meta.ts
@@ -79,6 +79,11 @@ export class MiMeta {
 	@Column('varchar', {
 		length: 1024, array: true, default: '{}',
 	})
+	public prohibitedWords: string[];
+
+	@Column('varchar', {
+		length: 1024, array: true, default: '{}',
+	})
 	public silencedHosts: string[];
 
 	@Column('varchar', {
diff --git a/packages/backend/src/server/api/SignupApiService.ts b/packages/backend/src/server/api/SignupApiService.ts
index d2e6185aa3..584853c1f3 100644
--- a/packages/backend/src/server/api/SignupApiService.ts
+++ b/packages/backend/src/server/api/SignupApiService.ts
@@ -176,12 +176,12 @@ export class SignupApiService {
 		}
 
 		if (instance.emailRequiredForSignup) {
-			if (await this.usersRepository.exist({ where: { usernameLower: username.toLowerCase(), host: IsNull() } })) {
+			if (await this.usersRepository.exists({ where: { usernameLower: username.toLowerCase(), host: IsNull() } })) {
 				throw new FastifyReplyError(400, 'DUPLICATED_USERNAME');
 			}
 
 			// Check deleted username duplication
-			if (await this.usedUsernamesRepository.exist({ where: { username: username.toLowerCase() } })) {
+			if (await this.usedUsernamesRepository.exists({ where: { username: username.toLowerCase() } })) {
 				throw new FastifyReplyError(400, 'USED_USERNAME');
 			}
 
diff --git a/packages/backend/src/server/api/endpoints/admin/meta.ts b/packages/backend/src/server/api/endpoints/admin/meta.ts
index c6edd6c9a1..6201d1554d 100644
--- a/packages/backend/src/server/api/endpoints/admin/meta.ts
+++ b/packages/backend/src/server/api/endpoints/admin/meta.ts
@@ -160,6 +160,13 @@ export const meta = {
 					type: 'string',
 				},
 			},
+			prohibitedWords: {
+				type: 'array',
+				optional: false, nullable: false,
+				items: {
+					type: 'string',
+				},
+			},
 			bannedEmailDomains: {
 				type: 'array',
 				optional: true, nullable: false,
@@ -549,6 +556,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 				blockedHosts: instance.blockedHosts,
 				silencedHosts: instance.silencedHosts,
 				sensitiveWords: instance.sensitiveWords,
+				prohibitedWords: instance.prohibitedWords,
 				preservedUsernames: instance.preservedUsernames,
 				bubbleInstances: instance.bubbleInstances,
 				hcaptchaSecretKey: instance.hcaptchaSecretKey,
diff --git a/packages/backend/src/server/api/endpoints/admin/promo/create.ts b/packages/backend/src/server/api/endpoints/admin/promo/create.ts
index ab69dfba96..339b7a8aa4 100644
--- a/packages/backend/src/server/api/endpoints/admin/promo/create.ts
+++ b/packages/backend/src/server/api/endpoints/admin/promo/create.ts
@@ -55,7 +55,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 				throw e;
 			});
 
-			const exist = await this.promoNotesRepository.exist({ where: { noteId: note.id } });
+			const exist = await this.promoNotesRepository.exists({ where: { noteId: note.id } });
 
 			if (exist) {
 				throw new ApiError(meta.errors.alreadyPromoted);
diff --git a/packages/backend/src/server/api/endpoints/admin/update-meta.ts b/packages/backend/src/server/api/endpoints/admin/update-meta.ts
index 8c0d2f8876..dce0253271 100644
--- a/packages/backend/src/server/api/endpoints/admin/update-meta.ts
+++ b/packages/backend/src/server/api/endpoints/admin/update-meta.ts
@@ -41,6 +41,11 @@ export const paramDef = {
 				type: 'string',
 			},
 		},
+		prohibitedWords: {
+			type: 'array', nullable: true, items: {
+				type: 'string',
+			},
+		},
 		themeColor: { type: 'string', nullable: true, pattern: '^#[0-9a-fA-F]{6}$' },
 		mascotImageUrl: { type: 'string', nullable: true },
 		bannerUrl: { type: 'string', nullable: true },
@@ -185,6 +190,9 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 			if (Array.isArray(ps.sensitiveWords)) {
 				set.sensitiveWords = ps.sensitiveWords.filter(Boolean);
 			}
+			if (Array.isArray(ps.prohibitedWords)) {
+				set.prohibitedWords = ps.prohibitedWords.filter(Boolean);
+			}
 			if (Array.isArray(ps.silencedHosts)) {
 				let lastValue = '';
 				set.silencedHosts = ps.silencedHosts.sort().filter((h) => {
diff --git a/packages/backend/src/server/api/endpoints/auth/accept.ts b/packages/backend/src/server/api/endpoints/auth/accept.ts
index e0baeb3565..602c34b1e6 100644
--- a/packages/backend/src/server/api/endpoints/auth/accept.ts
+++ b/packages/backend/src/server/api/endpoints/auth/accept.ts
@@ -62,7 +62,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 			const accessToken = secureRndstr(32);
 
 			// Fetch exist access token
-			const exist = await this.accessTokensRepository.exist({
+			const exist = await this.accessTokensRepository.exists({
 				where: {
 					appId: session.appId,
 					userId: me.id,
diff --git a/packages/backend/src/server/api/endpoints/blocking/create.ts b/packages/backend/src/server/api/endpoints/blocking/create.ts
index 1dc4563180..ea7d2076b0 100644
--- a/packages/backend/src/server/api/endpoints/blocking/create.ts
+++ b/packages/backend/src/server/api/endpoints/blocking/create.ts
@@ -88,7 +88,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 			});
 
 			// Check if already blocking
-			const exist = await this.blockingsRepository.exist({
+			const exist = await this.blockingsRepository.exists({
 				where: {
 					blockerId: blocker.id,
 					blockeeId: blockee.id,
diff --git a/packages/backend/src/server/api/endpoints/blocking/delete.ts b/packages/backend/src/server/api/endpoints/blocking/delete.ts
index a6e6bcb5b3..b0d66fd05c 100644
--- a/packages/backend/src/server/api/endpoints/blocking/delete.ts
+++ b/packages/backend/src/server/api/endpoints/blocking/delete.ts
@@ -88,7 +88,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 			});
 
 			// Check not blocking
-			const exist = await this.blockingsRepository.exist({
+			const exist = await this.blockingsRepository.exists({
 				where: {
 					blockerId: blocker.id,
 					blockeeId: blockee.id,
diff --git a/packages/backend/src/server/api/endpoints/clips/favorite.ts b/packages/backend/src/server/api/endpoints/clips/favorite.ts
index 015b2cfa85..b4c6a4940b 100644
--- a/packages/backend/src/server/api/endpoints/clips/favorite.ts
+++ b/packages/backend/src/server/api/endpoints/clips/favorite.ts
@@ -62,7 +62,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 				throw new ApiError(meta.errors.noSuchClip);
 			}
 
-			const exist = await this.clipFavoritesRepository.exist({
+			const exist = await this.clipFavoritesRepository.exists({
 				where: {
 					clipId: clip.id,
 					userId: me.id,
diff --git a/packages/backend/src/server/api/endpoints/drive/files/check-existence.ts b/packages/backend/src/server/api/endpoints/drive/files/check-existence.ts
index 85e6312b6a..8c1f491f8d 100644
--- a/packages/backend/src/server/api/endpoints/drive/files/check-existence.ts
+++ b/packages/backend/src/server/api/endpoints/drive/files/check-existence.ts
@@ -38,7 +38,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 		private driveFilesRepository: DriveFilesRepository,
 	) {
 		super(meta, paramDef, async (ps, me) => {
-			const exist = await this.driveFilesRepository.exist({
+			const exist = await this.driveFilesRepository.exists({
 				where: {
 					md5: ps.md5,
 					userId: me.id,
diff --git a/packages/backend/src/server/api/endpoints/flash/like.ts b/packages/backend/src/server/api/endpoints/flash/like.ts
index 1003249c0c..5878200828 100644
--- a/packages/backend/src/server/api/endpoints/flash/like.ts
+++ b/packages/backend/src/server/api/endpoints/flash/like.ts
@@ -70,7 +70,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 			}
 
 			// if already liked
-			const exist = await this.flashLikesRepository.exist({
+			const exist = await this.flashLikesRepository.exists({
 				where: {
 					flashId: flash.id,
 					userId: me.id,
diff --git a/packages/backend/src/server/api/endpoints/following/create.ts b/packages/backend/src/server/api/endpoints/following/create.ts
index 9037944ef9..1d0691407d 100644
--- a/packages/backend/src/server/api/endpoints/following/create.ts
+++ b/packages/backend/src/server/api/endpoints/following/create.ts
@@ -101,7 +101,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 			});
 
 			// Check if already following
-			const exist = await this.followingsRepository.exist({
+			const exist = await this.followingsRepository.exists({
 				where: {
 					followerId: follower.id,
 					followeeId: followee.id,
diff --git a/packages/backend/src/server/api/endpoints/following/delete.ts b/packages/backend/src/server/api/endpoints/following/delete.ts
index f44692ba6d..f761968c90 100644
--- a/packages/backend/src/server/api/endpoints/following/delete.ts
+++ b/packages/backend/src/server/api/endpoints/following/delete.ts
@@ -85,7 +85,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 			});
 
 			// Check not following
-			const exist = await this.followingsRepository.exist({
+			const exist = await this.followingsRepository.exists({
 				where: {
 					followerId: follower.id,
 					followeeId: followee.id,
diff --git a/packages/backend/src/server/api/endpoints/gallery/posts/like.ts b/packages/backend/src/server/api/endpoints/gallery/posts/like.ts
index cc424261b4..576cff4e91 100644
--- a/packages/backend/src/server/api/endpoints/gallery/posts/like.ts
+++ b/packages/backend/src/server/api/endpoints/gallery/posts/like.ts
@@ -72,7 +72,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 			}
 
 			// if already liked
-			const exist = await this.galleryLikesRepository.exist({
+			const exist = await this.galleryLikesRepository.exists({
 				where: {
 					postId: post.id,
 					userId: me.id,
diff --git a/packages/backend/src/server/api/endpoints/i/import-antennas.ts b/packages/backend/src/server/api/endpoints/i/import-antennas.ts
index 71db8710af..771f3395ce 100644
--- a/packages/backend/src/server/api/endpoints/i/import-antennas.ts
+++ b/packages/backend/src/server/api/endpoints/i/import-antennas.ts
@@ -71,7 +71,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 		private downloadService: DownloadService,
 	) {
 		super(meta, paramDef, async (ps, me) => {
-			const userExist = await this.usersRepository.exist({ where: { id: me.id } });
+			const userExist = await this.usersRepository.exists({ where: { id: me.id } });
 			if (!userExist) throw new ApiError(meta.errors.noSuchUser);
 			const file = await this.driveFilesRepository.findOneBy({ id: ps.fileId });
 			if (file === null) throw new ApiError(meta.errors.noSuchFile);
diff --git a/packages/backend/src/server/api/endpoints/i/revoke-token.ts b/packages/backend/src/server/api/endpoints/i/revoke-token.ts
index 98d866f867..545d16082c 100644
--- a/packages/backend/src/server/api/endpoints/i/revoke-token.ts
+++ b/packages/backend/src/server/api/endpoints/i/revoke-token.ts
@@ -34,7 +34,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 	) {
 		super(meta, paramDef, async (ps, me) => {
 			if (ps.tokenId) {
-				const tokenExist = await this.accessTokensRepository.exist({ where: { id: ps.tokenId } });
+				const tokenExist = await this.accessTokensRepository.exists({ where: { id: ps.tokenId } });
 
 				if (tokenExist) {
 					await this.accessTokensRepository.delete({
@@ -43,7 +43,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 					});
 				}
 			} else if (ps.token) {
-				const tokenExist = await this.accessTokensRepository.exist({ where: { token: ps.token } });
+				const tokenExist = await this.accessTokensRepository.exists({ where: { token: ps.token } });
 
 				if (tokenExist) {
 					await this.accessTokensRepository.delete({
diff --git a/packages/backend/src/server/api/endpoints/mute/create.ts b/packages/backend/src/server/api/endpoints/mute/create.ts
index 49c2b5707d..1d931150e1 100644
--- a/packages/backend/src/server/api/endpoints/mute/create.ts
+++ b/packages/backend/src/server/api/endpoints/mute/create.ts
@@ -83,7 +83,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 			});
 
 			// Check if already muting
-			const exist = await this.mutingsRepository.exist({
+			const exist = await this.mutingsRepository.exists({
 				where: {
 					muterId: muter.id,
 					muteeId: mutee.id,
diff --git a/packages/backend/src/server/api/endpoints/notes/create.ts b/packages/backend/src/server/api/endpoints/notes/create.ts
index 44ca1b9c16..dbcea2932e 100644
--- a/packages/backend/src/server/api/endpoints/notes/create.ts
+++ b/packages/backend/src/server/api/endpoints/notes/create.ts
@@ -17,6 +17,8 @@ import { NoteEntityService } from '@/core/entities/NoteEntityService.js';
 import { NoteCreateService } from '@/core/NoteCreateService.js';
 import { DI } from '@/di-symbols.js';
 import { isPureRenote } from '@/misc/is-pure-renote.js';
+import { MetaService } from '@/core/MetaService.js';
+import { UtilityService } from '@/core/UtilityService.js';
 import { ApiError } from '../../error.js';
 
 export const meta = {
@@ -117,6 +119,12 @@ export const meta = {
 			code: 'CANNOT_RENOTE_OUTSIDE_OF_CHANNEL',
 			id: '33510210-8452-094c-6227-4a6c05d99f00',
 		},
+
+		containsProhibitedWords: {
+			message: 'Cannot post because it contains prohibited words.',
+			code: 'CONTAINS_PROHIBITED_WORDS',
+			id: 'aa6e01d3-a85c-669d-758a-76aab43af334',
+		},
 	},
 } as const;
 
@@ -271,7 +279,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 
 				// Check blocking
 				if (renote.userId !== me.id) {
-					const blockExist = await this.blockingsRepository.exist({
+					const blockExist = await this.blockingsRepository.exists({
 						where: {
 							blockerId: renote.userId,
 							blockeeId: me.id,
@@ -319,7 +327,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 
 				// Check blocking
 				if (reply.userId !== me.id) {
-					const blockExist = await this.blockingsRepository.exist({
+					const blockExist = await this.blockingsRepository.exists({
 						where: {
 							blockerId: reply.userId,
 							blockeeId: me.id,
@@ -351,31 +359,40 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 			}
 
 			// 投稿を作成
-			const note = await this.noteCreateService.create(me, {
-				createdAt: new Date(),
-				files: files,
-				poll: ps.poll ? {
-					choices: ps.poll.choices,
-					multiple: ps.poll.multiple ?? false,
-					expiresAt: ps.poll.expiresAt ? new Date(ps.poll.expiresAt) : null,
-				} : undefined,
-				text: ps.text ?? undefined,
-				reply,
-				renote,
-				cw: ps.cw,
-				localOnly: ps.localOnly,
-				reactionAcceptance: ps.reactionAcceptance,
-				visibility: ps.visibility,
-				visibleUsers,
-				channel,
-				apMentions: ps.noExtractMentions ? [] : undefined,
-				apHashtags: ps.noExtractHashtags ? [] : undefined,
-				apEmojis: ps.noExtractEmojis ? [] : undefined,
-			});
+			try {
+				const note = await this.noteCreateService.create(me, {
+					createdAt: new Date(),
+					files: files,
+					poll: ps.poll ? {
+						choices: ps.poll.choices,
+						multiple: ps.poll.multiple ?? false,
+						expiresAt: ps.poll.expiresAt ? new Date(ps.poll.expiresAt) : null,
+					} : undefined,
+					text: ps.text ?? undefined,
+					reply,
+					renote,
+					cw: ps.cw,
+					localOnly: ps.localOnly,
+					reactionAcceptance: ps.reactionAcceptance,
+					visibility: ps.visibility,
+					visibleUsers,
+					channel,
+					apMentions: ps.noExtractMentions ? [] : undefined,
+					apHashtags: ps.noExtractHashtags ? [] : undefined,
+					apEmojis: ps.noExtractEmojis ? [] : undefined,
+				});
 
-			return {
-				createdNote: await this.noteEntityService.pack(note, me),
-			};
+				return {
+					createdNote: await this.noteEntityService.pack(note, me),
+				};
+			} catch (e) {
+				// TODO: 他のErrorもここでキャッチしてエラーメッセージを当てるようにしたい
+				if (e instanceof NoteCreateService.ContainsProhibitedWordsError) {
+					throw new ApiError(meta.errors.containsProhibitedWords);
+				}
+
+				throw e;
+			}
 		});
 	}
 }
diff --git a/packages/backend/src/server/api/endpoints/notes/edit.ts b/packages/backend/src/server/api/endpoints/notes/edit.ts
index 0c9c0d3baf..44796d9290 100644
--- a/packages/backend/src/server/api/endpoints/notes/edit.ts
+++ b/packages/backend/src/server/api/endpoints/notes/edit.ts
@@ -311,7 +311,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 
 				// Check blocking
 				if (renote.userId !== me.id) {
-					const blockExist = await this.blockingsRepository.exist({
+					const blockExist = await this.blockingsRepository.exists({
 						where: {
 							blockerId: renote.userId,
 							blockeeId: me.id,
@@ -349,7 +349,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 
 				// Check blocking
 				if (reply.userId !== me.id) {
-					const blockExist = await this.blockingsRepository.exist({
+					const blockExist = await this.blockingsRepository.exists({
 						where: {
 							blockerId: reply.userId,
 							blockeeId: me.id,
diff --git a/packages/backend/src/server/api/endpoints/notes/favorites/create.ts b/packages/backend/src/server/api/endpoints/notes/favorites/create.ts
index ed3dce7f35..bfa621aa38 100644
--- a/packages/backend/src/server/api/endpoints/notes/favorites/create.ts
+++ b/packages/backend/src/server/api/endpoints/notes/favorites/create.ts
@@ -67,7 +67,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 			});
 
 			// if already favorited
-			const exist = await this.noteFavoritesRepository.exist({
+			const exist = await this.noteFavoritesRepository.exists({
 				where: {
 					noteId: note.id,
 					userId: me.id,
diff --git a/packages/backend/src/server/api/endpoints/pages/like.ts b/packages/backend/src/server/api/endpoints/pages/like.ts
index 8c18982b50..bee60f080d 100644
--- a/packages/backend/src/server/api/endpoints/pages/like.ts
+++ b/packages/backend/src/server/api/endpoints/pages/like.ts
@@ -70,7 +70,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 			}
 
 			// if already liked
-			const exist = await this.pageLikesRepository.exist({
+			const exist = await this.pageLikesRepository.exists({
 				where: {
 					pageId: page.id,
 					userId: me.id,
diff --git a/packages/backend/src/server/api/endpoints/promo/read.ts b/packages/backend/src/server/api/endpoints/promo/read.ts
index f427939a7a..4899408ddd 100644
--- a/packages/backend/src/server/api/endpoints/promo/read.ts
+++ b/packages/backend/src/server/api/endpoints/promo/read.ts
@@ -49,7 +49,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 				throw err;
 			});
 
-			const exist = await this.promoReadsRepository.exist({
+			const exist = await this.promoReadsRepository.exists({
 				where: {
 					noteId: note.id,
 					userId: me.id,
diff --git a/packages/backend/src/server/api/endpoints/users/followers.ts b/packages/backend/src/server/api/endpoints/users/followers.ts
index 5706e46b96..314a45ed61 100644
--- a/packages/backend/src/server/api/endpoints/users/followers.ts
+++ b/packages/backend/src/server/api/endpoints/users/followers.ts
@@ -101,7 +101,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 				if (me == null) {
 					throw new ApiError(meta.errors.forbidden);
 				} else if (me.id !== user.id) {
-					const isFollowing = await this.followingsRepository.exist({
+					const isFollowing = await this.followingsRepository.exists({
 						where: {
 							followeeId: user.id,
 							followerId: me.id,
diff --git a/packages/backend/src/server/api/endpoints/users/following.ts b/packages/backend/src/server/api/endpoints/users/following.ts
index 794fb04f10..86f55c5a12 100644
--- a/packages/backend/src/server/api/endpoints/users/following.ts
+++ b/packages/backend/src/server/api/endpoints/users/following.ts
@@ -109,7 +109,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 				if (me == null) {
 					throw new ApiError(meta.errors.forbidden);
 				} else if (me.id !== user.id) {
-					const isFollowing = await this.followingsRepository.exist({
+					const isFollowing = await this.followingsRepository.exists({
 						where: {
 							followeeId: user.id,
 							followerId: me.id,
diff --git a/packages/backend/src/server/api/endpoints/users/lists/create-from-public.ts b/packages/backend/src/server/api/endpoints/users/lists/create-from-public.ts
index fa2e3338b8..dd9b459a1f 100644
--- a/packages/backend/src/server/api/endpoints/users/lists/create-from-public.ts
+++ b/packages/backend/src/server/api/endpoints/users/lists/create-from-public.ts
@@ -90,7 +90,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 		private roleService: RoleService,
 	) {
 		super(meta, paramDef, async (ps, me) => {
-			const listExist = await this.userListsRepository.exist({
+			const listExist = await this.userListsRepository.exists({
 				where: {
 					id: ps.listId,
 					isPublic: true,
@@ -121,7 +121,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 				});
 
 				if (currentUser.id !== me.id) {
-					const blockExist = await this.blockingsRepository.exist({
+					const blockExist = await this.blockingsRepository.exists({
 						where: {
 							blockerId: currentUser.id,
 							blockeeId: me.id,
@@ -132,7 +132,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 					}
 				}
 
-				const exist = await this.userListMembershipsRepository.exist({
+				const exist = await this.userListMembershipsRepository.exists({
 					where: {
 						userListId: userList.id,
 						userId: currentUser.id,
diff --git a/packages/backend/src/server/api/endpoints/users/lists/favorite.ts b/packages/backend/src/server/api/endpoints/users/lists/favorite.ts
index 864cdc2ee0..e5b3a73b55 100644
--- a/packages/backend/src/server/api/endpoints/users/lists/favorite.ts
+++ b/packages/backend/src/server/api/endpoints/users/lists/favorite.ts
@@ -47,7 +47,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 		private idService: IdService,
 	) {
 		super(meta, paramDef, async (ps, me) => {
-			const userListExist = await this.userListsRepository.exist({
+			const userListExist = await this.userListsRepository.exists({
 				where: {
 					id: ps.listId,
 					isPublic: true,
@@ -58,7 +58,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 				throw new ApiError(meta.errors.noSuchList);
 			}
 
-			const exist = await this.userListFavoritesRepository.exist({
+			const exist = await this.userListFavoritesRepository.exists({
 				where: {
 					userId: me.id,
 					userListId: ps.listId,
diff --git a/packages/backend/src/server/api/endpoints/users/lists/push.ts b/packages/backend/src/server/api/endpoints/users/lists/push.ts
index c4ceec575b..0984270943 100644
--- a/packages/backend/src/server/api/endpoints/users/lists/push.ts
+++ b/packages/backend/src/server/api/endpoints/users/lists/push.ts
@@ -104,7 +104,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 
 			// Check blocking
 			if (user.id !== me.id) {
-				const blockExist = await this.blockingsRepository.exist({
+				const blockExist = await this.blockingsRepository.exists({
 					where: {
 						blockerId: user.id,
 						blockeeId: me.id,
@@ -115,7 +115,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 				}
 			}
 
-			const exist = await this.userListMembershipsRepository.exist({
+			const exist = await this.userListMembershipsRepository.exists({
 				where: {
 					userListId: userList.id,
 					userId: user.id,
diff --git a/packages/backend/src/server/api/endpoints/users/lists/show.ts b/packages/backend/src/server/api/endpoints/users/lists/show.ts
index df44870b04..10efbaafd8 100644
--- a/packages/backend/src/server/api/endpoints/users/lists/show.ts
+++ b/packages/backend/src/server/api/endpoints/users/lists/show.ts
@@ -74,7 +74,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 					userListId: ps.listId,
 				});
 				if (me !== null) {
-					additionalProperties.isLiked = await this.userListFavoritesRepository.exist({
+					additionalProperties.isLiked = await this.userListFavoritesRepository.exists({
 						where: {
 							userId: me.id,
 							userListId: ps.listId,
diff --git a/packages/backend/src/server/api/endpoints/users/lists/unfavorite.ts b/packages/backend/src/server/api/endpoints/users/lists/unfavorite.ts
index d51d57343e..0935584cbc 100644
--- a/packages/backend/src/server/api/endpoints/users/lists/unfavorite.ts
+++ b/packages/backend/src/server/api/endpoints/users/lists/unfavorite.ts
@@ -45,7 +45,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 		private userListFavoritesRepository: UserListFavoritesRepository,
 	) {
 		super(meta, paramDef, async (ps, me) => {
-			const userListExist = await this.userListsRepository.exist({
+			const userListExist = await this.userListsRepository.exists({
 				where: {
 					id: ps.listId,
 					isPublic: true,
diff --git a/packages/backend/src/server/api/stream/channels/user-list.ts b/packages/backend/src/server/api/stream/channels/user-list.ts
index e0245814c4..0434833df8 100644
--- a/packages/backend/src/server/api/stream/channels/user-list.ts
+++ b/packages/backend/src/server/api/stream/channels/user-list.ts
@@ -43,7 +43,7 @@ class UserListChannel extends Channel {
 		this.withRenotes = params.withRenotes ?? true;
 
 		// Check existence and owner
-		const listExist = await this.userListsRepository.exist({
+		const listExist = await this.userListsRepository.exists({
 			where: {
 				id: this.listId,
 				userId: this.user!.id,