diff --git a/locales/ja.yml b/locales/ja.yml
index ab87494f93..90764f7e60 100644
--- a/locales/ja.yml
+++ b/locales/ja.yml
@@ -43,6 +43,28 @@ common:
   update-available: "Misskeyの新しいバージョンがあります({newer}。現在{current}を利用中)。ページを再度読み込みすると更新が適用されます。"
   my-token-regenerated: "あなたのトークンが更新されたのでサインアウトします。"
 
+  widgets:
+    profile: "プロフィール"
+    calendar: "カレンダー"
+    timemachine: "カレンダー(タイムマシン)"
+    activity: "アクティビティ"
+    rss: "RSSリーダー"
+    memo: "メモ"
+    trends: "トレンド"
+    photo-stream: "フォトストリーム"
+    slideshow: "スライドショー"
+    version: "バージョン"
+    broadcast: "ブロードキャスト"
+    notifications: "通知"
+    users: "おすすめユーザー"
+    polls: "投票"
+    post-form: "投稿フォーム"
+    messaging: "メッセージ"
+    server: "サーバー情報"
+    donation: "寄付のお願い"
+    nav: "ナビゲーション"
+    tips: "ヒント"
+
 common/views/components/connect-failed.vue:
   title: "サーバーに接続できません"
   description: "インターネット回線に問題があるか、サーバーがダウンまたはメンテナンスしている可能性があります。しばらくしてから{再度お試し}ください。"
@@ -201,6 +223,11 @@ common/views/widgets/server.vue:
   title: "サーバー情報"
   toggle: "表示を切り替え"
 
+common/views/widgets/memo.vue:
+  title: "メモ"
+  memo: "ここに書いて！"
+  save: "保存"
+
 desktop/views/components/activity.chart.vue:
   total: "Black ... Total"
   notes: "Blue ... Notes"
@@ -319,25 +346,6 @@ desktop/views/components/game-window.vue:
 desktop/views/components/home.vue:
   done: "完了"
   add-widget: "ウィジェットを追加:"
-  profile: "プロフィール"
-  calendar: "カレンダー"
-  timemachine: "カレンダー(タイムマシン)"
-  activity: "アクティビティ"
-  rss: "RSSリーダー"
-  trends: "トレンド"
-  photostream: "フォトストリーム"
-  slideshow: "スライドショー"
-  version: "バージョン"
-  broadcast: "ブロードキャスト"
-  notifications: "通知"
-  users: "おすすめユーザー"
-  polls: "投票"
-  post-form: "投稿フォーム"
-  messaging: "メッセージ"
-  server: "サーバー情報"
-  donation: "寄付のお願い"
-  nav: "ナビゲーション"
-  tips: "ヒント"
   add: "追加"
 
 desktop/views/input-dialog.vue:
diff --git a/src/client/app/common/views/widgets/index.ts b/src/client/app/common/views/widgets/index.ts
index 9107d90ce7..7ef4e02092 100644
--- a/src/client/app/common/views/widgets/index.ts
+++ b/src/client/app/common/views/widgets/index.ts
@@ -3,6 +3,7 @@ import Vue from 'vue';
 import wVersion from './version.vue';
 import wRss from './rss.vue';
 import wServer from './server.vue';
+import wMemo from './memo.vue';
 import wBroadcast from './broadcast.vue';
 import wCalendar from './calendar.vue';
 import wPhotoStream from './photo-stream.vue';
@@ -19,5 +20,6 @@ Vue.component('mkw-tips', wTips);
 Vue.component('mkw-donation', wDonation);
 Vue.component('mkw-broadcast', wBroadcast);
 Vue.component('mkw-server', wServer);
+Vue.component('mkw-memo', wMemo);
 Vue.component('mkw-rss', wRss);
 Vue.component('mkw-version', wVersion);
diff --git a/src/client/app/common/views/widgets/memo.vue b/src/client/app/common/views/widgets/memo.vue
new file mode 100644
index 0000000000..3f599c82a0
--- /dev/null
+++ b/src/client/app/common/views/widgets/memo.vue
@@ -0,0 +1,110 @@
+<template>
+<div class="mkw-memo">
+	<mk-widget-container :show-header="!props.compact">
+		<template slot="header">%fa:R sticky-note%%i18n:@title%</template>
+
+		<div class="mkw-memo--body">
+			<textarea v-model="text" placeholder="%i18n:@memo%" @input="onChange"></textarea>
+			<button @click="saveMemo" :disabled="!changed">%i18n:@save%</button>
+		</div>
+	</mk-widget-container>
+</div>
+</template>
+
+<script lang="ts">
+import define from '../../define-widget';
+
+export default define({
+	name: 'memo',
+	props: () => ({
+		compact: false
+	})
+}).extend({
+	data() {
+		return {
+			text: null,
+			changed: false
+		};
+	},
+
+	created() {
+		this.text = this.$store.state.settings.memo;
+
+		this.$watch('$store.state.settings.memo', text => {
+			this.text = text;
+		});
+	},
+
+	methods: {
+		func() {
+			this.props.compact = !this.props.compact;
+			this.save();
+		},
+
+		onChange() {
+			this.changed = true;
+		},
+
+		saveMemo() {
+			this.$store.dispatch('settings/set', {
+				key: 'memo',
+				value: this.text
+			});
+			this.changed = false;
+		}
+	}
+});
+</script>
+
+<style lang="stylus" scoped>
+@import '~const.styl'
+
+root(isDark)
+	.mkw-memo--body
+		padding-bottom 28px + 16px
+
+		> textarea
+			display block
+			width 100%
+			max-width 100%
+			min-width 100%
+			padding 16px
+			color isDark ? #fff : #222
+			background isDark ? #282c37 : #fff
+			border none
+			border-bottom solid 1px isDark ? #1c2023 : #eee
+
+		> button
+			display block
+			position absolute
+			bottom 8px
+			right 8px
+			margin 0
+			padding 0 10px
+			height 28px
+			color $theme-color-foreground
+			background $theme-color !important
+			outline none
+			border none
+			border-radius 4px
+			transition background 0.1s ease
+			cursor pointer
+
+			&:hover
+				background lighten($theme-color, 10%) !important
+
+			&:active
+				background darken($theme-color, 10%) !important
+				transition background 0s ease
+
+			&:disabled
+				opacity 0.7
+				cursor default
+
+.mkw-memo[data-darkmode]
+	root(true)
+
+.mkw-memo:not([data-darkmode])
+	root(false)
+
+</style>
diff --git a/src/client/app/desktop/views/components/home.vue b/src/client/app/desktop/views/components/home.vue
index 9d34575e55..f51fed7454 100644
--- a/src/client/app/desktop/views/components/home.vue
+++ b/src/client/app/desktop/views/components/home.vue
@@ -6,25 +6,26 @@
 			<div class="adder">
 				<p>%i18n:@add-widget%</p>
 				<select v-model="widgetAdderSelected">
-					<option value="profile">%i18n:@profile%</option>
-					<option value="calendar">%i18n:@calendar%</option>
-					<option value="timemachine">%i18n:@timemachine%</option>
-					<option value="activity">%i18n:@activity%</option>
-					<option value="rss">%i18n:@rss%</option>
-					<option value="trends">%i18n:@trends%</option>
-					<option value="photo-stream">%i18n:@photo-stream%</option>
-					<option value="slideshow">%i18n:@slideshow%</option>
-					<option value="version">%i18n:@version%</option>
-					<option value="broadcast">%i18n:@broadcast%</option>
-					<option value="notifications">%i18n:@notifications%</option>
-					<option value="users">%i18n:@users%</option>
-					<option value="polls">%i18n:@polls%</option>
-					<option value="post-form">%i18n:@post-form%</option>
-					<option value="messaging">%i18n:@messaging%</option>
-					<option value="server">%i18n:@server%</option>
-					<option value="donation">%i18n:@donation%</option>
-					<option value="nav">%i18n:@nav%</option>
-					<option value="tips">%i18n:@tips%</option>
+					<option value="profile">%i18n:common.widgets.profile%</option>
+					<option value="calendar">%i18n:common.widgets.calendar%</option>
+					<option value="timemachine">%i18n:common.widgets.timemachine%</option>
+					<option value="activity">%i18n:common.widgets.activity%</option>
+					<option value="rss">%i18n:common.widgets.rss%</option>
+					<option value="trends">%i18n:common.widgets.trends%</option>
+					<option value="photo-stream">%i18n:common.widgets.photo-stream%</option>
+					<option value="slideshow">%i18n:common.widgets.slideshow%</option>
+					<option value="version">%i18n:common.widgets.version%</option>
+					<option value="broadcast">%i18n:common.widgets.broadcast%</option>
+					<option value="notifications">%i18n:common.widgets.notifications%</option>
+					<option value="users">%i18n:common.widgets.users%</option>
+					<option value="polls">%i18n:common.widgets.polls%</option>
+					<option value="post-form">%i18n:common.widgets.post-form%</option>
+					<option value="messaging">%i18n:common.widgets.messaging%</option>
+					<option value="memo">%i18n:common.widgets.memo%</option>
+					<option value="server">%i18n:common.widgets.server%</option>
+					<option value="donation">%i18n:common.widgets.donation%</option>
+					<option value="nav">%i18n:common.widgets.nav%</option>
+					<option value="tips">%i18n:common.widgets.tips%</option>
 				</select>
 				<button @click="addWidget">%i18n:@add%</button>
 			</div>
diff --git a/src/client/app/mobile/views/pages/widgets.vue b/src/client/app/mobile/views/pages/widgets.vue
index 03abcabe8f..9d047fa635 100644
--- a/src/client/app/mobile/views/pages/widgets.vue
+++ b/src/client/app/mobile/views/pages/widgets.vue
@@ -8,17 +8,18 @@
 		<template v-if="customizing">
 			<header>
 				<select v-model="widgetAdderSelected">
-					<option value="profile">プロフィール</option>
-					<option value="calendar">カレンダー</option>
-					<option value="activity">アクティビティ</option>
-					<option value="rss">RSSリーダー</option>
-					<option value="photo-stream">フォトストリーム</option>
-					<option value="slideshow">スライドショー</option>
-					<option value="version">バージョン</option>
-					<option value="server">サーバー情報</option>
-					<option value="donation">寄付のお願い</option>
-					<option value="nav">ナビゲーション</option>
-					<option value="tips">ヒント</option>
+					<option value="profile">%i18n:common.widgets.profile%</option>
+					<option value="calendar">%i18n:common.widgets.calendar%</option>
+					<option value="activity">%i18n:common.widgets.activity%</option>
+					<option value="rss">%i18n:common.widgets.rss%</option>
+					<option value="photo-stream">%i18n:common.widgets.photo-stream%</option>
+					<option value="slideshow">%i18n:common.widgets.slideshow%</option>
+					<option value="version">%i18n:common.widgets.version%</option>
+					<option value="server">%i18n:common.widgets.server%</option>
+					<option value="memo">%i18n:common.widgets.memo%</option>
+					<option value="donation">%i18n:common.widgets.donation%</option>
+					<option value="nav">%i18n:common.widgets.nav%</option>
+					<option value="tips">%i18n:common.widgets.tips%</option>
 				</select>
 				<button @click="addWidget">追加</button>
 				<p><a @click="hint">カスタマイズのヒント</a></p>
diff --git a/src/client/app/store.ts b/src/client/app/store.ts
index c27ff0dfcf..905ec0501c 100644
--- a/src/client/app/store.ts
+++ b/src/client/app/store.ts
@@ -16,7 +16,8 @@ const defaultSettings = {
 	showMyRenotes: true,
 	showRenotedMyNotes: true,
 	loadRemoteMedia: true,
-	disableViaMobile: false
+	disableViaMobile: false,
+	memo: null
 };
 
 const defaultDeviceSettings = {