diff --git a/src/models/followed-log.ts b/src/models/followed-log.ts
index 9e3ca1782..7d488b9cd 100644
--- a/src/models/followed-log.ts
+++ b/src/models/followed-log.ts
@@ -1,12 +1,39 @@
-import { ObjectID } from 'mongodb';
+import * as mongo from 'mongodb';
 import db from '../db/mongodb';
 
 const FollowedLog = db.get<IFollowedLog>('followedLogs');
 export default FollowedLog;
 
 export type IFollowedLog = {
-	_id: ObjectID;
+	_id: mongo.ObjectID;
 	createdAt: Date;
-	userId: ObjectID;
+	userId: mongo.ObjectID;
 	count: number;
 };
+
+/**
+ * FollowedLogを物理削除します
+ */
+export async function deleteFollowedLog(followedLog: string | mongo.ObjectID | IFollowedLog) {
+	let f: IFollowedLog;
+
+	// Populate
+	if (mongo.ObjectID.prototype.isPrototypeOf(followedLog)) {
+		f = await FollowedLog.findOne({
+			_id: followedLog
+		});
+	} else if (typeof followedLog === 'string') {
+		f = await FollowedLog.findOne({
+			_id: new mongo.ObjectID(followedLog)
+		});
+	} else {
+		f = followedLog as IFollowedLog;
+	}
+
+	if (f == null) return;
+
+	// このFollowedLogを削除
+	await FollowedLog.remove({
+		_id: f._id
+	});
+}
diff --git a/src/models/following-log.ts b/src/models/following-log.ts
index 045ff7bf0..c06a337fd 100644
--- a/src/models/following-log.ts
+++ b/src/models/following-log.ts
@@ -1,12 +1,39 @@
-import { ObjectID } from 'mongodb';
+import * as mongo from 'mongodb';
 import db from '../db/mongodb';
 
 const FollowingLog = db.get<IFollowingLog>('followingLogs');
 export default FollowingLog;
 
 export type IFollowingLog = {
-	_id: ObjectID;
+	_id: mongo.ObjectID;
 	createdAt: Date;
-	userId: ObjectID;
+	userId: mongo.ObjectID;
 	count: number;
 };
+
+/**
+ * FollowingLogを物理削除します
+ */
+export async function deleteFollowingLog(followingLog: string | mongo.ObjectID | IFollowingLog) {
+	let f: IFollowingLog;
+
+	// Populate
+	if (mongo.ObjectID.prototype.isPrototypeOf(followingLog)) {
+		f = await FollowingLog.findOne({
+			_id: followingLog
+		});
+	} else if (typeof followingLog === 'string') {
+		f = await FollowingLog.findOne({
+			_id: new mongo.ObjectID(followingLog)
+		});
+	} else {
+		f = followingLog as IFollowingLog;
+	}
+
+	if (f == null) return;
+
+	// このFollowingLogを削除
+	await FollowingLog.remove({
+		_id: f._id
+	});
+}
diff --git a/src/models/user.ts b/src/models/user.ts
index d7249c944..a4b7becbd 100644
--- a/src/models/user.ts
+++ b/src/models/user.ts
@@ -16,6 +16,8 @@ import MessagingHistory, { deleteMessagingHistory } from './messaging-history';
 import DriveFile, { deleteDriveFile } from './drive-file';
 import DriveFolder, { deleteDriveFolder } from './drive-folder';
 import PollVote, { deletePollVote } from './poll-vote';
+import FollowingLog, { deleteFollowingLog } from './following-log';
+import FollowedLog, { deleteFollowedLog } from './followed-log';
 
 const User = db.get<IUser>('users');
 
@@ -228,8 +230,14 @@ export async function deleteUser(user: string | mongo.ObjectID | IUser) {
 	).map(x => deleteFollowing(x)));
 
 	// このユーザーのFollowingLogをすべて削除
+	await Promise.all((
+		await FollowingLog.find({ userId: u._id })
+	).map(x => deleteFollowingLog(x)));
 
 	// このユーザーのFollowedLogをすべて削除
+	await Promise.all((
+		await FollowedLog.find({ userId: u._id })
+	).map(x => deleteFollowedLog(x)));
 
 	// このユーザーを削除
 }