diff --git a/locales/ja-JP.yml b/locales/ja-JP.yml
index 084fd6448e..72c20819e3 100644
--- a/locales/ja-JP.yml
+++ b/locales/ja-JP.yml
@@ -685,6 +685,7 @@ center: "中央"
 wide: "広い"
 narrow: "狭い"
 reloadToApplySetting: "設定はページリロード後に反映されます。今すぐリロードしますか？"
+needReloadToApply: "反映には再起動が必要です。"
 showTitlebar: "タイトルバーを表示する"
 clearCache: "キャッシュをクリア"
 onlineUsersCount: "{n}人がオンライン"
diff --git a/packages/client/src/pages/settings/reaction.vue b/packages/client/src/pages/settings/reaction.vue
index 1df61ac471..0d4db46936 100644
--- a/packages/client/src/pages/settings/reaction.vue
+++ b/packages/client/src/pages/settings/reaction.vue
@@ -30,7 +30,10 @@
 		<option :value="3">{{ $ts.large }}</option>
 	</FormRadios>
 
-	<FormSwitch v-model="reactionPickerUseDrawerForMobile" class="_formBlock">{{ $ts.useDrawerReactionPickerForMobile }}</FormSwitch>
+	<FormSwitch v-model="reactionPickerUseDrawerForMobile" class="_formBlock">
+		{{ $ts.useDrawerReactionPickerForMobile }}
+		<template #caption>{{ $ts.needReloadToApply }}</template>
+	</FormSwitch>
 
 	<FormSection>
 		<div style="display: flex; gap: var(--margin); flex-wrap: wrap;">