diff --git a/packages/backend/src/core/activitypub/models/ApPersonService.ts b/packages/backend/src/core/activitypub/models/ApPersonService.ts
index e89ee4632..22ef0b139 100644
--- a/packages/backend/src/core/activitypub/models/ApPersonService.ts
+++ b/packages/backend/src/core/activitypub/models/ApPersonService.ts
@@ -43,6 +43,7 @@ import type { ApLoggerService } from '../ApLoggerService.js';
 // eslint-disable-next-line @typescript-eslint/consistent-type-imports
 import type { ApImageService } from './ApImageService.js';
 import type { IActor, IObject } from '../type.js';
+import { ca } from 'date-fns/locale';
 
 const nameLength = 128;
 const summaryLength = 2048;
@@ -259,13 +260,49 @@ export class ApPersonService implements OnModuleInit {
 
 		// Create user
 		let user: RemoteUser | null = null;
+		const userAdditionalInfo: Pick<RemoteUser, 'avatarId' | 'bannerId' | 'avatarUrl' | 'bannerUrl' | 'avatarBlurhash' | 'bannerBlurhash' | 'emojis'> = {
+			avatarId: null,
+			bannerId: null,
+			avatarUrl: null,
+			bannerUrl: null,
+			avatarBlurhash: null,
+			bannerBlurhash: null,
+			emojis: [],
+		};
+
+		try {
+			//#region アバターとヘッダー画像をフェッチ
+			const [avatar, banner] = await Promise.all([person.icon, person.image].map(img => {
+				if (img == null) return null;
+				if (user == null) throw new Error('failed to create user: user is null');
+				return this.apImageService.resolveImage(user, img).catch(() => null);
+			}));
+
+			userAdditionalInfo.avatarId = avatar?.id ?? null;
+			userAdditionalInfo.bannerId = banner?.id ?? null;
+			userAdditionalInfo.avatarUrl = avatar ? this.driveFileEntityService.getPublicUrl(avatar, 'avatar') : null;
+			userAdditionalInfo.bannerUrl = banner ? this.driveFileEntityService.getPublicUrl(banner) : null;
+			userAdditionalInfo.avatarBlurhash = avatar?.blurhash ?? null;
+			userAdditionalInfo.bannerBlurhash = banner?.blurhash ?? null;
+			//#endregion
+		} catch (err) {
+			this.logger.error('error occured while fetching user avatar/banner', { stack: err });
+		}
+
+		//#region カスタム絵文字取得
+		userAdditionalInfo.emojis = await this.apNoteService.extractEmojis(person.tag ?? [], host)
+			.then(_emojis => _emojis.map(emoji => emoji.name))
+			.catch(err => {
+				this.logger.error(`error occured while fetching user emojis`, { stack: err });
+				return [];
+			});
+		//#endregion
+
 		try {
 			// Start transaction
 			await this.db.transaction(async transactionalEntityManager => {
 				user = await transactionalEntityManager.save(new User({
 					id: this.idService.genId(),
-					avatarId: null,
-					bannerId: null,
 					createdAt: new Date(),
 					lastFetchedAt: new Date(),
 					name: truncate(person.name, nameLength),
@@ -285,6 +322,7 @@ export class ApPersonService implements OnModuleInit {
 					tags,
 					isBot,
 					isCat: (person as any).isCat === true,
+					...userAdditionalInfo,
 				})) as RemoteUser;
 
 				await transactionalEntityManager.save(new UserProfile({
@@ -321,6 +359,9 @@ export class ApPersonService implements OnModuleInit {
 
 		if (user == null) throw new Error('failed to create user: user is null');
 
+		// Register to the cache
+		this.cacheService.uriPersonCache.set(user.uri, user);
+
 		// Register host
 		this.federatedInstanceService.fetch(host).then(async i => {
 			this.instancesRepository.increment({ id: i.id }, 'usersCount', 1);
@@ -335,48 +376,6 @@ export class ApPersonService implements OnModuleInit {
 		// ハッシュタグ更新
 		this.hashtagService.updateUsertags(user, tags);
 
-		//#region アバターとヘッダー画像をフェッチ
-		const [avatar, banner] = await Promise.all([person.icon, person.image].map(img => {
-			if (img == null) return null;
-			if (user == null) throw new Error('failed to create user: user is null');
-			return this.apImageService.resolveImage(user, img).catch(() => null);
-		}));
-
-		const avatarId = avatar?.id ?? null;
-		const bannerId = banner?.id ?? null;
-		const avatarUrl = avatar ? this.driveFileEntityService.getPublicUrl(avatar, 'avatar') : null;
-		const bannerUrl = banner ? this.driveFileEntityService.getPublicUrl(banner) : null;
-		const avatarBlurhash = avatar?.blurhash ?? null;
-		const bannerBlurhash = banner?.blurhash ?? null;
-
-		await this.usersRepository.update(user.id, {
-			avatarId,
-			bannerId,
-			avatarUrl,
-			bannerUrl,
-			avatarBlurhash,
-			bannerBlurhash,
-		});
-
-		user.avatarId = avatarId;
-		user.bannerId = bannerId;
-		user.avatarUrl = avatarUrl;
-		user.bannerUrl = bannerUrl;
-		user.avatarBlurhash = avatarBlurhash;
-		user.bannerBlurhash = bannerBlurhash;
-		//#endregion
-
-		//#region カスタム絵文字取得
-		const emojis = await this.apNoteService.extractEmojis(person.tag ?? [], host).catch(err => {
-			this.logger.info(`extractEmojis: ${err}`);
-			return [];
-		});
-
-		const emojiNames = emojis.map(emoji => emoji.name);
-
-		await this.usersRepository.update(user.id, { emojis: emojiNames });
-		//#endregion
-
 		await this.updateFeatured(user.id, resolver).catch(err => this.logger.error(err));
 
 		return user;
@@ -400,7 +399,7 @@ export class ApPersonService implements OnModuleInit {
 		if (uri.startsWith(`${this.config.url}/`)) return;
 
 		//#region このサーバーに既に登録されているか
-		const exist = await this.usersRepository.findOneBy({ uri }) as RemoteUser | null;
+		const exist = await this.fetchPerson(uri) as RemoteUser | null;
 		if (exist === null) return;
 		//#endregion