diff --git a/CHANGELOG.md b/CHANGELOG.md
index ff633c5a1..7c727cea7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -14,6 +14,7 @@
 - Fix: 月の違う同じ日はセパレータが表示されないのを修正
 - Fix: 縦横比が極端なカスタム絵文字を表示する際にレイアウトが崩れる箇所があるのを修正  
   (Cherry-picked from https://github.com/MisskeyIO/misskey/pull/725)
+- Fix: 設定変更時のリロード確認ダイアログが複数個表示されることがある問題を修正
 
 ### Server
 - Fix: アンテナの書き込み時にキーワードが与えられなかった場合のエラーをApiErrorとして投げるように
diff --git a/locales/index.d.ts b/locales/index.d.ts
index fecc57039..b06e0f245 100644
--- a/locales/index.d.ts
+++ b/locales/index.d.ts
@@ -3121,7 +3121,7 @@ export interface Locale extends ILocale {
      */
     "narrow": string;
     /**
-     * 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？
+     * 設定はページリロード後に反映されます。
      */
     "reloadToApplySetting": string;
     /**
diff --git a/locales/ja-JP.yml b/locales/ja-JP.yml
index 2877c8fe3..292569cc5 100644
--- a/locales/ja-JP.yml
+++ b/locales/ja-JP.yml
@@ -778,7 +778,7 @@ left: "左"
 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？"
+reloadToApplySetting: "設定はページリロード後に反映されます。"
 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"
diff --git a/packages/frontend/src/pages/settings/general.vue b/packages/frontend/src/pages/settings/general.vue
index 15af5617c..69238b043 100644
--- a/packages/frontend/src/pages/settings/general.vue
+++ b/packages/frontend/src/pages/settings/general.vue
@@ -258,7 +258,7 @@ import { langs } from '@@/js/config.js';
 import { defaultStore } from '@/store.js';
 import * as os from '@/os.js';
 import { misskeyApi } from '@/scripts/misskey-api.js';
-import { unisonReload } from '@/scripts/unison-reload.js';
+import { reloadAsk } from '@/scripts/reload-ask.js';
 import { i18n } from '@/i18n.js';
 import { definePageMetadata } from '@/scripts/page-metadata.js';
 import { miLocalStorage } from '@/local-storage.js';
@@ -270,16 +270,6 @@ const fontSize = ref(miLocalStorage.getItem('fontSize'));
 const useSystemFont = ref(miLocalStorage.getItem('useSystemFont') != null);
 const dataSaver = ref(defaultStore.state.dataSaver);
 
-async function reloadAsk() {
-	const { canceled } = await os.confirm({
-		type: 'info',
-		text: i18n.ts.reloadToApplySetting,
-	});
-	if (canceled) return;
-
-	unisonReload();
-}
-
 const hemisphere = computed(defaultStore.makeGetterSetter('hemisphere'));
 const overridedDeviceKind = computed(defaultStore.makeGetterSetter('overridedDeviceKind'));
 const serverDisconnectedBehavior = computed(defaultStore.makeGetterSetter('serverDisconnectedBehavior'));
@@ -369,7 +359,7 @@ watch([
 	confirmWhenRevealingSensitiveMedia,
 	contextMenu,
 ], async () => {
-	await reloadAsk();
+	await reloadAsk({ reason: i18n.ts.reloadToApplySetting, unison: true });
 });
 
 const emojiIndexLangs = ['en-US', 'ja-JP', 'ja-JP_hira'] as const;
diff --git a/packages/frontend/src/pages/settings/navbar.vue b/packages/frontend/src/pages/settings/navbar.vue
index 7f8460e31..a0e6cad9c 100644
--- a/packages/frontend/src/pages/settings/navbar.vue
+++ b/packages/frontend/src/pages/settings/navbar.vue
@@ -54,7 +54,7 @@ import MkContainer from '@/components/MkContainer.vue';
 import * as os from '@/os.js';
 import { navbarItemDef } from '@/navbar.js';
 import { defaultStore } from '@/store.js';
-import { unisonReload } from '@/scripts/unison-reload.js';
+import { reloadAsk } from '@/scripts/reload-ask.js';
 import { i18n } from '@/i18n.js';
 import { definePageMetadata } from '@/scripts/page-metadata.js';
 
@@ -67,16 +67,6 @@ const items = ref(defaultStore.state.menu.map(x => ({
 
 const menuDisplay = computed(defaultStore.makeGetterSetter('menuDisplay'));
 
-async function reloadAsk() {
-	const { canceled } = await os.confirm({
-		type: 'info',
-		text: i18n.ts.reloadToApplySetting,
-	});
-	if (canceled) return;
-
-	unisonReload();
-}
-
 async function addItem() {
 	const menu = Object.keys(navbarItemDef).filter(k => !defaultStore.state.menu.includes(k));
 	const { canceled, result: item } = await os.select({
@@ -100,7 +90,7 @@ function removeItem(index: number) {
 
 async function save() {
 	defaultStore.set('menu', items.value.map(x => x.type));
-	await reloadAsk();
+	await reloadAsk({ reason: i18n.ts.reloadToApplySetting, unison: true });
 }
 
 function reset() {
@@ -111,7 +101,7 @@ function reset() {
 }
 
 watch(menuDisplay, async () => {
-	await reloadAsk();
+	await reloadAsk({ reason: i18n.ts.reloadToApplySetting, unison: true });
 });
 
 const headerActions = computed(() => []);
diff --git a/packages/frontend/src/pages/settings/other.vue b/packages/frontend/src/pages/settings/other.vue
index a1cb2ea1c..0f7609c83 100644
--- a/packages/frontend/src/pages/settings/other.vue
+++ b/packages/frontend/src/pages/settings/other.vue
@@ -98,7 +98,7 @@ import { defaultStore } from '@/store.js';
 import { signout, signinRequired } from '@/account.js';
 import { i18n } from '@/i18n.js';
 import { definePageMetadata } from '@/scripts/page-metadata.js';
-import { unisonReload } from '@/scripts/unison-reload.js';
+import { reloadAsk } from '@/scripts/reload-ask.js';
 import FormSection from '@/components/form/section.vue';
 
 const $i = signinRequired();
@@ -132,16 +132,6 @@ async function deleteAccount() {
 	await signout();
 }
 
-async function reloadAsk() {
-	const { canceled } = await os.confirm({
-		type: 'info',
-		text: i18n.ts.reloadToApplySetting,
-	});
-	if (canceled) return;
-
-	unisonReload();
-}
-
 async function updateRepliesAll(withReplies: boolean) {
 	const { canceled } = await os.confirm({
 		type: 'warning',
@@ -155,7 +145,7 @@ async function updateRepliesAll(withReplies: boolean) {
 watch([
 	enableCondensedLineForAcct,
 ], async () => {
-	await reloadAsk();
+	await reloadAsk({ reason: i18n.ts.reloadToApplySetting, unison: true });
 });
 
 const headerActions = computed(() => []);
diff --git a/packages/frontend/src/pages/settings/theme.vue b/packages/frontend/src/pages/settings/theme.vue
index 7d192bcbe..ce8ec6869 100644
--- a/packages/frontend/src/pages/settings/theme.vue
+++ b/packages/frontend/src/pages/settings/theme.vue
@@ -88,19 +88,9 @@ import { uniqueBy } from '@/scripts/array.js';
 import { fetchThemes, getThemes } from '@/theme-store.js';
 import { definePageMetadata } from '@/scripts/page-metadata.js';
 import { miLocalStorage } from '@/local-storage.js';
-import { unisonReload } from '@/scripts/unison-reload.js';
+import { reloadAsk } from '@/scripts/reload-ask.js';
 import * as os from '@/os.js';
 
-async function reloadAsk() {
-	const { canceled } = await os.confirm({
-		type: 'info',
-		text: i18n.ts.reloadToApplySetting,
-	});
-	if (canceled) return;
-
-	unisonReload();
-}
-
 const installedThemes = ref(getThemes());
 const builtinThemes = getBuiltinThemesRef();
 
@@ -148,13 +138,13 @@ watch(syncDeviceDarkMode, () => {
 	}
 });
 
-watch(wallpaper, () => {
+watch(wallpaper, async () => {
 	if (wallpaper.value == null) {
 		miLocalStorage.removeItem('wallpaper');
 	} else {
 		miLocalStorage.setItem('wallpaper', wallpaper.value);
 	}
-	reloadAsk();
+	await reloadAsk({ reason: i18n.ts.reloadToApplySetting, unison: true });
 });
 
 onActivated(() => {
diff --git a/packages/frontend/src/scripts/reload-ask.ts b/packages/frontend/src/scripts/reload-ask.ts
new file mode 100644
index 000000000..733d91b85
--- /dev/null
+++ b/packages/frontend/src/scripts/reload-ask.ts
@@ -0,0 +1,40 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import { i18n } from '@/i18n.js';
+import * as os from '@/os.js';
+import { unisonReload } from '@/scripts/unison-reload.js';
+
+let isReloadConfirming = false;
+
+export async function reloadAsk(opts: {
+	unison?: boolean;
+	reason?: string;
+}) {
+	if (isReloadConfirming) {
+		return;
+	}
+
+	isReloadConfirming = true;
+
+	const { canceled } = await os.confirm(opts.reason == null ? {
+		type: 'info',
+		text: i18n.ts.reloadConfirm,
+	} : {
+		type: 'info',
+		title: i18n.ts.reloadConfirm,
+		text: opts.reason,
+	}).finally(() => {
+		isReloadConfirming = false;
+	});
+
+	if (canceled) return;
+
+	if (opts.unison) {
+		unisonReload();
+	} else {
+		location.reload();
+	}
+}