diff --git a/packages/backend/src/core/entities/UserEntityService.ts b/packages/backend/src/core/entities/UserEntityService.ts
index 3f8254bb6c..68d30fe174 100644
--- a/packages/backend/src/core/entities/UserEntityService.ts
+++ b/packages/backend/src/core/entities/UserEntityService.ts
@@ -114,8 +114,8 @@ export class UserEntityService implements OnModuleInit {
 		@Inject(DI.pagesRepository)
 		private pagesRepository: PagesRepository,
 		
-		@Inject(DI.userMemoRepository)
-		private userMemoRepository: UserMemoRepository,
+		@Inject(DI.userMemosRepository)
+		private userMemosRepository: UserMemoRepository,
 
 		//private noteEntityService: NoteEntityService,
 		//private driveFileEntityService: DriveFileEntityService,
@@ -340,7 +340,7 @@ export class UserEntityService implements OnModuleInit {
 
 		const falsy = opts.detail ? false : undefined;
 
-		const memo = meId == null ? null : await this.userMemoRepository.findOneBy({
+		const memo = meId == null ? null : await this.userMemosRepository.findOneBy({
 			userId: meId,
 			targetUserId: user.id,
 		}).then(row => row?.memo ?? null);
diff --git a/packages/backend/src/di-symbols.ts b/packages/backend/src/di-symbols.ts
index b93ba899fb..190d8d65c2 100644
--- a/packages/backend/src/di-symbols.ts
+++ b/packages/backend/src/di-symbols.ts
@@ -70,6 +70,6 @@ export const DI = {
 	roleAssignmentsRepository: Symbol('roleAssignmentsRepository'),
 	flashsRepository: Symbol('flashsRepository'),
 	flashLikesRepository: Symbol('flashLikesRepository'),
-	userMemoRepository: Symbol('userMemoRepository'),
+	userMemosRepository: Symbol('userMemosRepository'),
 	//#endregion
 };
diff --git a/packages/backend/src/models/RepositoryModule.ts b/packages/backend/src/models/RepositoryModule.ts
index a415e37904..588c98b58d 100644
--- a/packages/backend/src/models/RepositoryModule.ts
+++ b/packages/backend/src/models/RepositoryModule.ts
@@ -388,8 +388,8 @@ const $roleAssignmentsRepository: Provider = {
 	inject: [DI.db],
 };
 
-const $userMemoRepository: Provider = {
-	provide: DI.userMemoRepository,
+const $userMemosRepository: Provider = {
+	provide: DI.userMemosRepository,
 	useFactory: (db: DataSource) => db.getRepository(UserMemo),
 	inject: [DI.db],
 };
@@ -462,7 +462,7 @@ const $userMemoRepository: Provider = {
 		$roleAssignmentsRepository,
 		$flashsRepository,
 		$flashLikesRepository,
-		$userMemoRepository,
+		$userMemosRepository,
 	],
 	exports: [
 		$usersRepository,
@@ -529,7 +529,7 @@ const $userMemoRepository: Provider = {
 		$roleAssignmentsRepository,
 		$flashsRepository,
 		$flashLikesRepository,
-		$userMemoRepository,
+		$userMemosRepository,
 	],
 })
 export class RepositoryModule {}
diff --git a/packages/backend/src/server/api/endpoints/users/update-memo.ts b/packages/backend/src/server/api/endpoints/users/update-memo.ts
index 300435b9ff..ca7756ef75 100644
--- a/packages/backend/src/server/api/endpoints/users/update-memo.ts
+++ b/packages/backend/src/server/api/endpoints/users/update-memo.ts
@@ -39,8 +39,8 @@ export const paramDef = {
 @Injectable()
 export default class extends Endpoint<typeof meta, typeof paramDef> {
 	constructor(
-		@Inject(DI.userMemoRepository)
-		private userMemoRepository: UserMemoRepository,
+		@Inject(DI.userMemosRepository)
+		private userMemosRepository: UserMemoRepository,
 		private getterService: GetterService,
 		private idService: IdService,
 	) {
@@ -53,7 +53,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 
 			// 引数がnullか空文字であれば、パーソナルメモを削除する
 			if (ps.memo === '' || ps.memo == null) {
-				await this.userMemoRepository.delete({
+				await this.userMemosRepository.delete({
 					userId: me.id,
 					targetUserId: target.id,
 				});
@@ -61,20 +61,20 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 			}
 
 			// 以前に作成されたパーソナルメモがあるかどうか確認
-			const previousMemo = await this.userMemoRepository.findOneBy({
+			const previousMemo = await this.userMemosRepository.findOneBy({
 				userId: me.id,
 				targetUserId: target.id,
 			});
 
 			if (!previousMemo) {
-				await this.userMemoRepository.insert({
+				await this.userMemosRepository.insert({
 					id: this.idService.genId(),
 					userId: me.id,
 					targetUserId: target.id,
 					memo: ps.memo,
 				});
 			} else {
-				await this.userMemoRepository.update(previousMemo.id, {
+				await this.userMemosRepository.update(previousMemo.id, {
 					userId: me.id,
 					targetUserId: target.id,
 					memo: ps.memo,