diff --git a/locales/ja-JP.yml b/locales/ja-JP.yml
index b06432fc16..7b73c5f2ea 100644
--- a/locales/ja-JP.yml
+++ b/locales/ja-JP.yml
@@ -711,6 +711,7 @@ jumpToSpecifiedDate: "特定の日付にジャンプ"
 showingPastTimeline: "過去のタイムラインを表示しています"
 clear: "クリア"
 markAllAsRead: "全て既読にする"
+goBack: "戻る"
 
 _email:
   _follow:
diff --git a/src/client/store.ts b/src/client/store.ts
index e6fdd12f1d..bccb6cc206 100644
--- a/src/client/store.ts
+++ b/src/client/store.ts
@@ -150,7 +150,7 @@ export const defaultStore = markRaw(new Storage('base', {
 	},
 	showGapBetweenNotesInTimeline: {
 		where: 'device',
-		default: true
+		default: false
 	},
 	darkMode: {
 		where: 'device',
diff --git a/src/client/ui/_common_/header.vue b/src/client/ui/_common_/header.vue
index f95447096f..64ad0393c2 100644
--- a/src/client/ui/_common_/header.vue
+++ b/src/client/ui/_common_/header.vue
@@ -1,7 +1,7 @@
 <template>
 <div class="fdidabkb" :class="{ center }" :style="`--height:${height};`">
 	<transition :name="$store.state.animation ? 'header' : ''" mode="out-in" appear>
-		<button class="_button back" v-if="withBack && canBack" @click.stop="back()"><Fa :icon="faChevronLeft"/></button>
+		<button class="_button back" v-if="withBack && canBack" @click.stop="back()" v-tooltip="$ts.goBack"><Fa :icon="faChevronLeft"/></button>
 	</transition>
 	<template v-if="info">
 		<div class="titleContainer">