diff --git a/src/post/create.ts b/src/post/create.ts
index ecea37382..4ad1503e0 100644
--- a/src/post/create.ts
+++ b/src/post/create.ts
@@ -1,8 +1,6 @@
-import parseAcct from '../acct/parse';
 import Post from '../models/post';
-import User from '../models/user';
 
-export default async (post, reply, repost, atMentions) => {
+export default async (post, reply, repost, mentions) => {
 	post.mentions = [];
 
 	function addMention(mentionee) {
@@ -36,15 +34,7 @@ export default async (post, reply, repost, atMentions) => {
 		post._repost = null;
 	}
 
-	await Promise.all(atMentions.map(async mention => {
-		// Fetch mentioned user
-		// SELECT _id
-		const { _id } = await User
-			.findOne(parseAcct(mention), { _id: true });
-
-		// Add mention
-		addMention(_id);
-	}));
+	await Promise.all(mentions.map(({ _id }) => addMention(_id)));
 
 	return Post.insert(post);
 };
diff --git a/src/queue/processors/http/process-inbox.ts b/src/queue/processors/http/process-inbox.ts
index 88fbb9737..7eeaa19f8 100644
--- a/src/queue/processors/http/process-inbox.ts
+++ b/src/queue/processors/http/process-inbox.ts
@@ -25,7 +25,7 @@ export default async ({ data }, done) => {
 			}) as IRemoteUser;
 
 			if (user === null) {
-				user = await resolvePerson(data.signature.keyId);
+				user = await resolvePerson(new Resolver(), data.signature.keyId);
 			}
 		}
 
diff --git a/src/remote/activitypub/create.ts b/src/remote/activitypub/create.ts
index 97c72860f..710d56fd3 100644
--- a/src/remote/activitypub/create.ts
+++ b/src/remote/activitypub/create.ts
@@ -7,6 +7,7 @@ import { IRemoteUser } from '../../models/user';
 import uploadFromUrl from '../../drive/upload-from-url';
 import createPost from '../../post/create';
 import distributePost from '../../post/distribute';
+import resolvePerson from './resolve-person';
 import Resolver from './resolver';
 const createDOMPurify = require('dompurify');
 
@@ -53,6 +54,15 @@ class Creator {
 				.map(({ object }) => object.$id);
 
 		const { window } = new JSDOM(note.content);
+		const mentions = [];
+
+		for (const { href, type } of note.tags) {
+			switch (type) {
+			case 'Mention':
+				mentions.push(resolvePerson(resolver, href));
+				break;
+			}
+		}
 
 		const inserted = await createPost({
 			channelId: undefined,
@@ -69,7 +79,7 @@ class Creator {
 			viaMobile: false,
 			geo: undefined,
 			uri: note.id
-		}, null, null, []);
+		}, null, null, await Promise.all(mentions));
 
 		const promises = [];
 
diff --git a/src/remote/activitypub/resolve-person.ts b/src/remote/activitypub/resolve-person.ts
index 2cf3ad32d..7ed01e322 100644
--- a/src/remote/activitypub/resolve-person.ts
+++ b/src/remote/activitypub/resolve-person.ts
@@ -4,14 +4,13 @@ import User, { validateUsername, isValidName, isValidDescription } from '../../m
 import { createHttp } from '../../queue';
 import webFinger from '../webfinger';
 import create from './create';
-import Resolver from './resolver';
 
 async function isCollection(collection) {
 	return ['Collection', 'OrderedCollection'].includes(collection.type);
 }
 
-export default async (value, verifier?: string) => {
-	const { resolver, object } = await new Resolver().resolveOne(value);
+export default async (parentResolver, value, verifier?: string) => {
+	const { resolver, object } = parentResolver.resolveOne(value);
 
 	if (
 		object === null ||
diff --git a/src/remote/resolve-user.ts b/src/remote/resolve-user.ts
index 48219e8cb..097ed6673 100644
--- a/src/remote/resolve-user.ts
+++ b/src/remote/resolve-user.ts
@@ -1,6 +1,7 @@
 import { toUnicode, toASCII } from 'punycode';
 import User from '../models/user';
 import resolvePerson from './activitypub/resolve-person';
+import Resolver from './activitypub/resolver';
 import webFinger from './webfinger';
 
 export default async (username, host, option) => {
@@ -19,7 +20,7 @@ export default async (username, host, option) => {
 			throw new Error();
 		}
 
-		user = await resolvePerson(self.href, acctLower);
+		user = await resolvePerson(new Resolver(), self.href, acctLower);
 	}
 
 	return user;
diff --git a/src/server/api/endpoints/posts/create.ts b/src/server/api/endpoints/posts/create.ts
index 03af7ee76..47897626f 100644
--- a/src/server/api/endpoints/posts/create.ts
+++ b/src/server/api/endpoints/posts/create.ts
@@ -3,12 +3,13 @@
  */
 import $ from 'cafy';
 import deepEqual = require('deep-equal');
+import parseAcct from '../../../../acct/parse';
 import renderAcct from '../../../../acct/render';
 import config from '../../../../config';
 import html from '../../../../text/html';
 import parse from '../../../../text/parse';
 import Post, { IPost, isValidText, isValidCw } from '../../../../models/post';
-import { ILocalUser } from '../../../../models/user';
+import User, { ILocalUser } from '../../../../models/user';
 import Channel, { IChannel } from '../../../../models/channel';
 import DriveFile from '../../../../models/drive-file';
 import create from '../../../../post/create';
@@ -267,7 +268,10 @@ module.exports = (params, user: ILocalUser, app) => new Promise(async (res, rej)
 			.filter(t => t.type == 'mention')
 			.map(renderAcct)
 			// Drop dupulicates
-			.filter((v, i, s) => s.indexOf(v) == i);
+			.filter((v, i, s) => s.indexOf(v) == i)
+			// Fetch mentioned user
+			// SELECT _id
+			.map(mention => User.findOne(parseAcct(mention), { _id: true }));
 	}
 
 	// 投稿を作成
@@ -286,7 +290,7 @@ module.exports = (params, user: ILocalUser, app) => new Promise(async (res, rej)
 		viaMobile: viaMobile,
 		visibility,
 		geo
-	}, reply, repost, atMentions);
+	}, reply, repost, await Promise.all(atMentions));
 
 	const postObj = await distribute(user, post.mentions, post);