diff --git a/CHANGELOG.md b/CHANGELOG.md
index c01d284bdb..45109dc544 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -11,6 +11,7 @@
 - Enhance: コントロールパネル内のファイル一覧でセンシティブなファイルを区別しやすく
 - Fix: サーバーメトリクスが2つ以上あるとリロード直後の表示がおかしくなる問題を修正
 - 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: 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 fecc570395..b06e0f245b 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 a1210bad29..d8a6f55913 100644
--- a/locales/ja-JP.yml
+++ b/locales/ja-JP.yml
@@ -776,7 +776,7 @@ 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 15af5617cc..69238b0436 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 7f8460e316..a0e6cad9c8 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 a1cb2ea1c4..0f7609c83e 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 7d192bcbea..ce8ec68692 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 0000000000..733d91b85a
--- /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();
+	}
+}