diff --git a/locales/index.d.ts b/locales/index.d.ts
index 63878d3d47..d87fabdcf6 100644
--- a/locales/index.d.ts
+++ b/locales/index.d.ts
@@ -5222,6 +5222,14 @@ export interface Locale extends ILocale {
      * 注意事項を理解した上でオンにします。
      */
     "acknowledgeNotesAndEnable": string;
+    /**
+     * リアクションする際に確認する
+     */
+    "confirmOnReact": string;
+    /**
+     * " {emoji} " をリアクションしますか？
+     */
+    "reactAreYouSure": ParameterizedString<"emoji">;
     "_accountSettings": {
         /**
          * コンテンツの表示にログインを必須にする
diff --git a/locales/ja-JP.yml b/locales/ja-JP.yml
index d78bd4ee65..7ac8fc225e 100644
--- a/locales/ja-JP.yml
+++ b/locales/ja-JP.yml
@@ -1301,6 +1301,8 @@ lockdown: "ロックダウン"
 pleaseSelectAccount: "アカウントを選択してください"
 availableRoles: "利用可能なロール"
 acknowledgeNotesAndEnable: "注意事項を理解した上でオンにします。"
+confirmOnReact: "リアクションする際に確認する"
+reactAreYouSure: "\" {emoji} \" をリアクションしますか？"
 
 _accountSettings:
   requireSigninToViewContents: "コンテンツの表示にログインを必須にする"
diff --git a/packages/frontend/src/components/MkNote.vue b/packages/frontend/src/components/MkNote.vue
index 1a8814b7cb..9511dbc4db 100644
--- a/packages/frontend/src/components/MkNote.vue
+++ b/packages/frontend/src/components/MkNote.vue
@@ -471,7 +471,16 @@ function react(): void {
 		}
 	} else {
 		blur();
-		reactionPicker.show(reactButton.value ?? null, note.value, reaction => {
+		reactionPicker.show(reactButton.value ?? null, note.value, async (reaction) => {
+			if (defaultStore.state.confirmOnReact) {
+				const confirm = await os.confirm({
+					type: 'question',
+					text: i18n.tsx.reactAreYouSure({ emoji: reaction }),
+				});
+
+				if (confirm.canceled) return;
+			}
+
 			sound.playMisskeySfx('reaction');
 
 			if (props.mock) {
diff --git a/packages/frontend/src/components/MkNoteDetailed.vue b/packages/frontend/src/components/MkNoteDetailed.vue
index 4a350388c2..f82b44a838 100644
--- a/packages/frontend/src/components/MkNoteDetailed.vue
+++ b/packages/frontend/src/components/MkNoteDetailed.vue
@@ -450,7 +450,16 @@ function react(): void {
 		}
 	} else {
 		blur();
-		reactionPicker.show(reactButton.value ?? null, note.value, reaction => {
+		reactionPicker.show(reactButton.value ?? null, note.value, async (reaction) => {
+			if (defaultStore.state.confirmOnReact) {
+				const confirm = await os.confirm({
+					type: 'question',
+					text: i18n.tsx.reactAreYouSure({ emoji: reaction }),
+				});
+
+				if (confirm.canceled) return;
+			}
+
 			sound.playMisskeySfx('reaction');
 
 			misskeyApi('notes/reactions/create', {
diff --git a/packages/frontend/src/components/MkReactionsViewer.reaction.vue b/packages/frontend/src/components/MkReactionsViewer.reaction.vue
index b65038aadc..c9e015dcf4 100644
--- a/packages/frontend/src/components/MkReactionsViewer.reaction.vue
+++ b/packages/frontend/src/components/MkReactionsViewer.reaction.vue
@@ -90,6 +90,15 @@ async function toggleReaction() {
 			}
 		});
 	} else {
+		if (defaultStore.state.confirmOnReact) {
+			const confirm = await os.confirm({
+				type: 'question',
+				text: i18n.tsx.reactAreYouSure({ emoji: props.reaction }),
+			});
+
+			if (confirm.canceled) return;
+		}
+
 		sound.playMisskeySfx('reaction');
 
 		if (mock) {
diff --git a/packages/frontend/src/pages/settings/general.vue b/packages/frontend/src/pages/settings/general.vue
index 1bfdfd0e76..7f1a9e5c20 100644
--- a/packages/frontend/src/pages/settings/general.vue
+++ b/packages/frontend/src/pages/settings/general.vue
@@ -170,6 +170,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 				<MkSwitch v-model="enableHorizontalSwipe">{{ i18n.ts.enableHorizontalSwipe }}</MkSwitch>
 				<MkSwitch v-model="alwaysConfirmFollow">{{ i18n.ts.alwaysConfirmFollow }}</MkSwitch>
 				<MkSwitch v-model="confirmWhenRevealingSensitiveMedia">{{ i18n.ts.confirmWhenRevealingSensitiveMedia }}</MkSwitch>
+				<MkSwitch v-model="confirmOnReact">{{ i18n.ts.confirmOnReact }}</MkSwitch>
 			</div>
 			<MkSelect v-model="serverDisconnectedBehavior">
 				<template #label>{{ i18n.ts.whenServerDisconnected }}</template>
@@ -319,6 +320,7 @@ const enableHorizontalSwipe = computed(defaultStore.makeGetterSetter('enableHori
 const useNativeUIForVideoAudioPlayer = computed(defaultStore.makeGetterSetter('useNativeUIForVideoAudioPlayer'));
 const alwaysConfirmFollow = computed(defaultStore.makeGetterSetter('alwaysConfirmFollow'));
 const confirmWhenRevealingSensitiveMedia = computed(defaultStore.makeGetterSetter('confirmWhenRevealingSensitiveMedia'));
+const confirmOnReact = computed(defaultStore.makeGetterSetter('confirmOnReact'));
 const contextMenu = computed(defaultStore.makeGetterSetter('contextMenu'));
 
 watch(lang, () => {
diff --git a/packages/frontend/src/store.ts b/packages/frontend/src/store.ts
index 1d981e897b..b9511e82ce 100644
--- a/packages/frontend/src/store.ts
+++ b/packages/frontend/src/store.ts
@@ -474,6 +474,10 @@ export const defaultStore = markRaw(new Storage('base', {
 		where: 'device',
 		default: true,
 	},
+	confirmOnReact: {
+		where: 'device',
+		default: false,
+	},
 
 	sound_masterVolume: {
 		where: 'device',