diff --git a/src/message-like.ts b/src/message-like.ts
index 530acda..b720029 100644
--- a/src/message-like.ts
+++ b/src/message-like.ts
@@ -1,6 +1,7 @@
 import 藍 from './ai';
 import Friend from './friend';
 import { User } from './misskey/user';
+import includes from './utils/includes';
 const delay = require('timeout-as-promise');
 
 export default class MessageLike {
@@ -62,4 +63,8 @@ export default class MessageLike {
 			});
 		}
 	}
+
+	public includes = (words: string[]): boolean => {
+		return includes(this.text, words);
+	}
 }
diff --git a/src/modules/core/index.ts b/src/modules/core/index.ts
index 719780b..14a7a26 100644
--- a/src/modules/core/index.ts
+++ b/src/modules/core/index.ts
@@ -4,7 +4,6 @@ import MessageLike from '../../message-like';
 import serifs from '../../serifs';
 import Friend from '../../friend';
 import getDate from '../../utils/get-date';
-import includes from '../../utils/includes';
 
 function zeroPadding(num: number, length: number): string {
 	return ('0000000000' + num).slice(-length);
@@ -137,25 +136,25 @@ export default class CoreModule implements IModule {
 			.sort((a, b) => a.length < b.length ? 1 : -1)[0]
 			.substr(1);
 
-		if (includes(msg.text, ['こんにちは', 'こんにちわ'])) {
+		if (msg.includes(['こんにちは', 'こんにちわ'])) {
 			msg.reply(serifs.core.hello(msg.friend.name));
 			incLove();
 			return true;
 		}
 
-		if (includes(msg.text, ['こんばんは', 'こんばんわ'])) {
+		if (msg.includes(['こんばんは', 'こんばんわ'])) {
 			msg.reply(serifs.core.helloNight(msg.friend.name));
 			incLove();
 			return true;
 		}
 
-		if (includes(msg.text, ['おは', 'お早う'])) {
+		if (msg.includes(['おは', 'お早う'])) {
 			msg.reply(serifs.core.goodMorning(tension, msg.friend.name));
 			incLove();
 			return true;
 		}
 
-		if (includes(msg.text, ['おやすみ', 'お休み'])) {
+		if (msg.includes(['おやすみ', 'お休み'])) {
 			msg.reply(serifs.core.goodNight(msg.friend.name));
 			incLove();
 			return true;
@@ -165,7 +164,7 @@ export default class CoreModule implements IModule {
 	}
 
 	private nadenade = (msg: MessageLike): boolean => {
-		if (!includes(msg.text, ['なでなで'])) return false;
+		if (!msg.includes(['なでなで'])) return false;
 
 		// メッセージのみ
 		if (!msg.isMessage) return true;
@@ -199,7 +198,7 @@ export default class CoreModule implements IModule {
 	}
 
 	private kawaii = (msg: MessageLike): boolean => {
-		if (!includes(msg.text, ['かわいい', '可愛い'])) return false;
+		if (!msg.includes(['かわいい', '可愛い'])) return false;
 
 		msg.reply(
 			msg.friend.love >= 5 ? serifs.core.kawaii.love :
@@ -210,7 +209,7 @@ export default class CoreModule implements IModule {
 	}
 
 	private humu = (msg: MessageLike): boolean => {
-		if (!includes(msg.text, ['踏んで'])) return false;
+		if (!msg.includes(['踏んで'])) return false;
 
 		// メッセージのみ
 		if (!msg.isMessage) return true;
@@ -223,7 +222,7 @@ export default class CoreModule implements IModule {
 	}
 
 	private batou = (msg: MessageLike): boolean => {
-		if (!includes(msg.text, ['罵倒して', '罵って'])) return false;
+		if (!msg.includes(['罵倒して', '罵って'])) return false;
 
 		// メッセージのみ
 		if (!msg.isMessage) return true;
@@ -237,7 +236,7 @@ export default class CoreModule implements IModule {
 	}
 
 	private ponkotu = (msg: MessageLike): boolean => {
-		if (!includes(msg.text, ['ぽんこつ'])) return false;
+		if (!msg.includes(['ぽんこつ'])) return false;
 
 		msg.friend.decLove();
 
diff --git a/src/modules/emoji/index.ts b/src/modules/emoji/index.ts
index ffb207c..54da9ef 100644
--- a/src/modules/emoji/index.ts
+++ b/src/modules/emoji/index.ts
@@ -2,7 +2,6 @@ import 藍 from '../../ai';
 import IModule from '../../module';
 import MessageLike from '../../message-like';
 import serifs from '../../serifs';
-import includes from '../../utils/includes';
 
 const hands = [
 	'👏',
@@ -125,7 +124,7 @@ export default class EmojiModule implements IModule {
 	public install = (ai: 藍) => { }
 
 	public onMention = (msg: MessageLike) => {
-		if (includes(msg.text, ['絵文字', 'emoji'])) {
+		if (msg.includes(['絵文字', 'emoji'])) {
 			const hand = hands[Math.floor(Math.random() * hands.length)];
 			const face = faces[Math.floor(Math.random() * faces.length)];
 			const emoji = Array.isArray(hand) ? hand[0] + face + hand[1] : hand + face + hand;
diff --git a/src/modules/fortune/index.ts b/src/modules/fortune/index.ts
index b455f75..5a4807c 100644
--- a/src/modules/fortune/index.ts
+++ b/src/modules/fortune/index.ts
@@ -3,7 +3,6 @@ import IModule from '../../module';
 import MessageLike from '../../message-like';
 import serifs from '../../serifs';
 import * as seedrandom from 'seedrandom';
-import includes from '../../utils/includes';
 
 const omikujis = [
 	'大大吉',
@@ -31,7 +30,7 @@ export default class FortuneModule implements IModule {
 	public install = (ai: 藍) => { }
 
 	public onMention = (msg: MessageLike) => {
-		if (includes(msg.text, ['占', 'うらな', '運勢', 'おみくじ'])) {
+		if (msg.includes(['占', 'うらな', '運勢', 'おみくじ'])) {
 			const date = new Date();
 			const seed = `${date.getFullYear()}/${date.getMonth()}/${date.getDay()}@${msg.userId}`;
 			const rng = seedrandom(seed);
diff --git a/src/modules/guessing-game/index.ts b/src/modules/guessing-game/index.ts
index 62d8ce1..a96125b 100644
--- a/src/modules/guessing-game/index.ts
+++ b/src/modules/guessing-game/index.ts
@@ -4,7 +4,6 @@ import IModule from '../../module';
 import MessageLike from '../../message-like';
 import serifs from '../../serifs';
 import getCollection from '../../utils/get-collection';
-import includes from '../../utils/includes';
 
 export default class GuessingGameModule implements IModule {
 	public readonly name = 'guessingGame';
@@ -29,7 +28,7 @@ export default class GuessingGameModule implements IModule {
 	}
 
 	public onMention = (msg: MessageLike) => {
-		if (includes(msg.text, ['数当て', '数あて'])) {
+		if (msg.includes(['数当て', '数あて'])) {
 			const exist = this.guesses.findOne({
 				userId: msg.userId,
 				isEnded: false
diff --git a/src/modules/reversi/index.ts b/src/modules/reversi/index.ts
index f96511a..abcd85f 100644
--- a/src/modules/reversi/index.ts
+++ b/src/modules/reversi/index.ts
@@ -8,8 +8,6 @@ import MessageLike from '../../message-like';
 import * as WebSocket from 'ws';
 import Friend from '../../friend';
 import getDate from '../../utils/get-date';
-import { User } from '../../misskey/user';
-import includes from '../../utils/includes';
 
 export default class ReversiModule implements IModule {
 	public readonly name = 'reversi';
@@ -46,7 +44,7 @@ export default class ReversiModule implements IModule {
 	}
 
 	public onMention = (msg: MessageLike) => {
-		if (includes(msg.text, ['リバーシ', 'オセロ', 'reversi', 'othello'])) {
+		if (msg.includes(['リバーシ', 'オセロ', 'reversi', 'othello'])) {
 			if (config.reversiEnabled) {
 				msg.reply(serifs.reversi.ok);
 
diff --git a/src/utils/includes.ts b/src/utils/includes.ts
index e92d81f..3f66967 100644
--- a/src/utils/includes.ts
+++ b/src/utils/includes.ts
@@ -1,4 +1,4 @@
-import { hiraganaToKatagana, zenkakuToHankaku, hankakuToZenkaku } from './japanese';
+import { hiraganaToKatagana, hankakuToZenkaku } from './japanese';
 
 export default function(text: string, words: string[]): boolean {
 	if (text == null) return false;