diff --git a/locales/en-US.yml b/locales/en-US.yml
index 5609803ff..d23c167c4 100644
--- a/locales/en-US.yml
+++ b/locales/en-US.yml
@@ -2014,9 +2014,12 @@ _2fa:
   renewTOTPCancel: "Cancel"
   checkBackupCodesBeforeCloseThisWizard: "Before you close this window, please note the following backup codes."
   backupCodes: "Backup codes"
-  backupCodesDescription: "You can use these codes to gain access to your account in case of becoming unable to use your two-factor authentificator app. Each can only be used once. Please keep them in a safe place."
-  backupCodeUsedWarning: "A backup code has been used. Please reconfigure two-factor authentification as soon as possible if you are no longer able to use it."
-  backupCodesExhaustedWarning: "All backup codes have been used. Should you lose access to your two-factor authentification app, you will be unable to access this account. Please reconfigure two-factor authentification."
+  backupCodesDescription: "You can use these codes to gain access to your account in case of becoming unable to use your two-factor authenticator app. Each can only be used once. Please keep them in a safe place."
+  backupCodeUsedWarning: "A backup code has been used. Please reconfigure two-factor authentication as soon as possible if you are no longer able to use it."
+  backupCodesExhaustedWarning: "All backup codes have been used. Should you lose access to your two-factor authentication app, you will be unable to access this account. Please reconfigure two-factor authentication."
+  backupCodesSavedConfirmTitle: "Did you save your backup codes?"
+  backupCodesSavedConfirmDescription: "If you lose both your two-factor authentication app and backup codes, YOU WILL LOSE ACCESS TO YOUR ACCOUNT.\nKeep them safe and secure, and do not share them with anyone.\n\n$[x2 Two-factor authentication settings CANNOT be changed by anyone other than yourself, $[fg.color=red AND THE ADMINISTRATOR CANNOT DISABLE IT EITHER.]]"
+  backupCodesSavedConfirmChecked: "I have saved my backup codes"
   howto2fa: "If you are having trouble setting up, please refer to {link}."
 _permissions:
   "read:account": "View your account information"
diff --git a/locales/index.d.ts b/locales/index.d.ts
index f5ba524a0..806dc9af7 100644
--- a/locales/index.d.ts
+++ b/locales/index.d.ts
@@ -7856,6 +7856,21 @@ export interface Locale extends ILocale {
          * バックアップコードが全て使用されました。認証アプリを利用できない場合、これ以上アカウントにアクセスできなくなります。認証アプリを再登録してください。
          */
         "backupCodesExhaustedWarning": string;
+        /**
+         * バックアップコードを保存しましたか？
+         */
+        "backupCodesSavedConfirmTitle": string;
+        /**
+         * 二要素認証アプリとバックアップコードの両方を紛失した場合、アカウントにアクセスできなくなります。
+         * 誰とも共有せず、適切な方法で保管してください。
+         *
+         * $[x2 二要素認証設定は自分以外の誰にも変更できませんので、$[fg.color=red 運営チームも無効化することはできません。]]
+         */
+        "backupCodesSavedConfirmDescription": string;
+        /**
+         * バックアップコードを保存しました
+         */
+        "backupCodesSavedConfirmChecked": string;
         /**
          * 設定方法でお困りの際は、{link}を参照してください。
          */
diff --git a/locales/ja-JP.yml b/locales/ja-JP.yml
index ca49714ee..f9c4c8bbf 100644
--- a/locales/ja-JP.yml
+++ b/locales/ja-JP.yml
@@ -2064,6 +2064,9 @@ _2fa:
   backupCodesDescription: "認証アプリが使用できなくなった場合、以下のバックアップコードを使ってアカウントにアクセスできます。これらのコードは必ず安全な場所に保管してください。各コードは一回だけ使用できます。"
   backupCodeUsedWarning: "バックアップコードが使用されました。認証アプリが使えなくなっている場合、なるべく早く認証アプリを再設定してください。"
   backupCodesExhaustedWarning: "バックアップコードが全て使用されました。認証アプリを利用できない場合、これ以上アカウントにアクセスできなくなります。認証アプリを再登録してください。"
+  backupCodesSavedConfirmTitle: "バックアップコードを保存しましたか？"
+  backupCodesSavedConfirmDescription: "二要素認証アプリとバックアップコードの両方を紛失した場合、アカウントにアクセスできなくなります。\n誰とも共有せず、適切な方法で保管してください。\n\n$[x2 二要素認証設定は自分以外の誰にも変更できませんので、$[fg.color=red 運営チームも無効化することはできません。]]"
+  backupCodesSavedConfirmChecked: "バックアップコードを保存しました"
   howto2fa: "設定方法でお困りの際は、{link}を参照してください。"
 
 _permissions:
diff --git a/locales/ko-KR.yml b/locales/ko-KR.yml
index afe3248c8..929f80058 100644
--- a/locales/ko-KR.yml
+++ b/locales/ko-KR.yml
@@ -1992,9 +1992,12 @@ _2fa:
   renewTOTPCancel: "취소"
   checkBackupCodesBeforeCloseThisWizard: "이 위자드를 닫기 전에 아래 백업 코드를 확인하십시오"
   backupCodes: "백업 코드"
-  backupCodesDescription: "인증 앱을 사용할 수 없게 된 경우 아래 백업 코드를 사용하여 계정에 액세스 할 수 있습니다.이 코드들은 반드시 안전한 장소에 보관하십시오.각 코드는 한 번만 사용할 수 있습니다."
-  backupCodeUsedWarning: "백업 코드가 사용되었습니다.인증 앱을 사용할 수 없게 된 경우, 조속히 인증 앱을 다시 설정해 주십시오."
-  backupCodesExhaustedWarning: "백업 코드가 모두 사용되었습니다.인증 앱을 사용할 수 없는 경우 더 이상 계정에 액세스하는 것이 불가능합니다.인증 앱을 다시 등록해 주세요."
+  backupCodesDescription: "인증 앱을 사용할 수 없게 된 경우 아래 백업 코드를 사용하여 계정에 액세스 할 수 있습니다. 이 코드들은 반드시 안전한 장소에 보관하십시오. 각 코드는 한 번만 사용할 수 있습니다."
+  backupCodeUsedWarning: "백업 코드가 사용되었습니다. 인증 앱을 사용할 수 없게 된 경우, 조속히 인증 앱을 다시 설정해 주십시오."
+  backupCodesExhaustedWarning: "백업 코드가 모두 사용되었습니다. 인증 앱을 사용할 수 없는 경우 더 이상 계정에 액세스하는 것이 불가능합니다. 인증 앱을 다시 등록해 주세요."
+  backupCodesSavedConfirmTitle: "백업 코드를 저장했습니까?"
+  backupCodesSavedConfirmDescription: "인증 앱과 백업 코드를 모두 분실하면\n계정에 액세스할 수 없게 됩니다.\n자신만이 알 수 있도록 안전한 장소에 보관해 주십시오.\n\n$[x2 2단계 인증 설정은\n본인만이 변경할 수 있으며, $[fg.color=red 운영팀도 해제할 수 없습니다.]]"
+  backupCodesSavedConfirmChecked: "백업 코드를 저장했습니다"
   howto2fa: "설정 방법에 대한 자세한 내용은 {link}를 참조하세요."
 _permissions:
   "read:account": "계정의 정보를 봅니다"
diff --git a/packages/frontend/src/components/MkDialog.vue b/packages/frontend/src/components/MkDialog.vue
index a1cecfbc2..b20cfa574 100644
--- a/packages/frontend/src/components/MkDialog.vue
+++ b/packages/frontend/src/components/MkDialog.vue
@@ -48,6 +48,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 				<option v-for="item in select.items" :value="item.value">{{ item.text }}</option>
 			</template>
 		</MkSelect>
+		<MkSwitch v-if="switchLabel" v-model="switchValue" style="display: flex; margin: 1em 0; justify-content: center;">{{ switchLabel }}</MkSwitch>
 		<details v-if="details" class="_acrylic" style="margin: 1em 0;">
 			<summary>{{ i18n.ts.details }}</summary>
 			<div class="_gaps_s" style="text-align: initial;">
@@ -58,7 +59,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 			</div>
 		</details>
 		<div v-if="(showOkButton || showCancelButton) && !actions" :class="$style.buttons">
-			<MkButton v-if="showOkButton" data-cy-modal-dialog-ok inline primary rounded :autofocus="!input && !select" :disabled="okButtonDisabledReason" @click="ok">{{ okText ?? ((showCancelButton || input || select) ? i18n.ts.ok : i18n.ts.gotIt) }}</MkButton>
+			<MkButton v-if="showOkButton" data-cy-modal-dialog-ok inline primary rounded :autofocus="!input && !select" :disabled="okDisabled || okButtonDisabledReason" @click="ok">{{ okText ?? ((showCancelButton || input || select) ? i18n.ts.ok : i18n.ts.gotIt) }}<span v-if="okDisabled && okWaitInitiated"> ({{ sec }})</span></MkButton>
 			<MkButton v-if="showCancelButton || input || select" data-cy-modal-dialog-cancel inline rounded @click="cancel">{{ cancelText ?? i18n.ts.cancel }}</MkButton>
 		</div>
 		<div v-if="actions" :class="$style.buttons">
@@ -69,11 +70,12 @@ SPDX-License-Identifier: AGPL-3.0-only
 </template>
 
 <script lang="ts" setup>
-import { onBeforeUnmount, onMounted, ref, shallowRef, computed } from 'vue';
+import { onBeforeUnmount, onMounted, ref, shallowRef, computed, watch } from 'vue';
 import MkModal from '@/components/MkModal.vue';
 import MkButton from '@/components/MkButton.vue';
 import MkInput from '@/components/MkInput.vue';
 import MkSelect from '@/components/MkSelect.vue';
+import MkSwitch from '@/components/MkSwitch.vue';
 import MkTextarea from '@/components/MkTextarea.vue';
 import MkKeyValue from '@/components/MkKeyValue.vue';
 import { i18n } from '@/i18n.js';
@@ -104,6 +106,7 @@ const props = withDefaults(defineProps<{
 	text?: string | null;
 	input?: Input;
 	select?: Select;
+	switchLabel?: string | null;
 	details?: Record<string, string>;
 	actions?: {
 		text: string;
@@ -115,6 +118,8 @@ const props = withDefaults(defineProps<{
 	showCancelButton?: boolean;
 	cancelableByBgClick?: boolean;
 	okText?: string;
+	okWaitInitiate?: 'dialog' | 'input' | 'switch';
+	okWaitDuration?: number;
 	cancelText?: string;
 }>(), {
 	type: 'info',
@@ -123,17 +128,20 @@ const props = withDefaults(defineProps<{
 	text: undefined,
 	input: undefined,
 	select: undefined,
+	switchLabel: undefined,
 	details: undefined,
 	actions: undefined,
 	showOkButton: true,
 	showCancelButton: false,
 	cancelableByBgClick: true,
 	okText: undefined,
+	okWaitInitiate: undefined,
+	okWaitDuration: 0,
 	cancelText: undefined,
 });
 
 const emit = defineEmits<{
-	(ev: 'done', v: { canceled: true } | { canceled: false, result: Result }): void;
+	(ev: 'done', v: { canceled: true } | { canceled: false, result: Result, toggle: boolean }): void;
 	(ev: 'closed'): void;
 }>();
 
@@ -141,6 +149,16 @@ const modal = shallowRef<InstanceType<typeof MkModal>>();
 
 const inputValue = ref<string | number | null>(props.input?.default ?? null);
 const selectedValue = ref(props.select?.default ?? null);
+const switchValue = ref<boolean>(false);
+
+const sec = ref(props.okWaitDuration);
+const okWaitInitiated = computed(() => {
+	if (props.okWaitInitiate === 'dialog') return true;
+	if (props.okWaitInitiate === 'input') return inputValue.value !== null;
+	if (props.okWaitInitiate === 'switch') return switchValue.value;
+	return false;
+});
+const okDisabled = computed(() => sec.value > 0);
 
 const okButtonDisabledReason = computed<null | 'charactersExceeded' | 'charactersBelow'>(() => {
 	if (props.input) {
@@ -161,9 +179,9 @@ const okButtonDisabledReason = computed<null | 'charactersExceeded' | 'character
 
 // overload function を使いたいので lint エラーを無視する
 function done(canceled: true): void;
-function done(canceled: false, result: Result): void; // eslint-disable-line no-redeclare
-function done(canceled: boolean, result?: Result): void { // eslint-disable-line no-redeclare
-	emit('done', { canceled, result } as { canceled: true } | { canceled: false, result: Result });
+function done(canceled: false, result: Result, toggle: boolean): void; // eslint-disable-line no-redeclare
+function done(canceled: boolean, result?: Result, toggle?: boolean ): void { // eslint-disable-line no-redeclare
+	emit('done', { canceled, result, toggle } as { canceled: true } | { canceled: false, result: Result, toggle: boolean });
 	modal.value?.close();
 }
 
@@ -174,18 +192,13 @@ async function ok() {
 		props.input ? inputValue.value :
 		props.select ? selectedValue.value :
 		true;
-	done(false, result);
+	done(false, result, switchValue.value);
 }
 
 function cancel() {
 	done(true);
 }
 
-/*
-function onBgClick() {
-	if (props.cancelableByBgClick) cancel();
-}
-*/
 function onKeydown(evt: KeyboardEvent) {
 	if (evt.key === 'Escape') cancel();
 }
@@ -198,8 +211,24 @@ function onInputKeydown(evt: KeyboardEvent) {
 	}
 }
 
+watch(okWaitInitiated, () => {
+	sec.value = props.okWaitDuration;
+});
+
 onMounted(() => {
 	document.addEventListener('keydown', onKeydown);
+
+	sec.value = props.okWaitDuration;
+	if (sec.value > 0) {
+		const waitTimer = setInterval(() => {
+			if (!okWaitInitiated.value) return;
+
+			if (sec.value < 0) {
+				clearInterval(waitTimer);
+			}
+			sec.value = sec.value - 1;
+		}, 1000);
+	}
 });
 
 onBeforeUnmount(() => {
diff --git a/packages/frontend/src/os.ts b/packages/frontend/src/os.ts
index d63faa551..e0b4ae492 100644
--- a/packages/frontend/src/os.ts
+++ b/packages/frontend/src/os.ts
@@ -221,7 +221,10 @@ export function alert(props: {
 	type?: 'error' | 'info' | 'success' | 'warning' | 'waiting' | 'question';
 	title?: string | null;
 	text?: string | null;
+	switchLabel?: string | null;
 	details?: Record<string, string>;
+	okWaitInitiate?: 'dialog' | 'input' | 'switch';
+	okWaitDuration?: number;
 }): Promise<void> {
 	return new Promise(resolve => {
 		popup(MkDialog, props, {
@@ -236,8 +239,11 @@ export function confirm(props: {
 	type: 'error' | 'info' | 'success' | 'warning' | 'waiting' | 'question';
 	title?: string | null;
 	text?: string | null;
+	switchLabel?: string | null;
 	details?: Record<string, string>;
 	okText?: string;
+	okWaitInitiate?: 'dialog' | 'input' | 'switch';
+	okWaitDuration?: number;
 	cancelText?: string;
 }): Promise<{ canceled: boolean }> {
 	return new Promise(resolve => {
diff --git a/packages/frontend/src/pages/settings/2fa.qrdialog.vue b/packages/frontend/src/pages/settings/2fa.qrdialog.vue
index 1dc61a33b..17287910b 100644
--- a/packages/frontend/src/pages/settings/2fa.qrdialog.vue
+++ b/packages/frontend/src/pages/settings/2fa.qrdialog.vue
@@ -7,7 +7,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 <MkModalWindow
 	ref="dialog"
 	:width="500"
-	:height="550"
+	:height="600"
 	@close="cancel"
 	@closed="emit('closed')"
 >
@@ -76,15 +76,11 @@ SPDX-License-Identifier: AGPL-3.0-only
 
 								<div class="_gaps">
 									<MkInfo warn>{{ i18n.ts._2fa.backupCodesDescription }}</MkInfo>
+									<MkButton primary rounded gradate full @click="downloadBackupCodes"><i class="ti ti-download"></i> {{ i18n.ts.download }}</MkButton>
 
 									<div v-for="(code, i) in backupCodes" :key="code" class="_gaps_s">
-										<MkKeyValue :copy="code">
-											<template #key>#{{ i + 1 }}</template>
-											<template #value><code class="_monospace">{{ code }}</code></template>
-										</MkKeyValue>
+										<span style="text-align: center;">#{{ i + 1 }}. <code class="_monospace">{{ code }}</code></span>
 									</div>
-
-									<MkButton primary rounded gradate @click="downloadBackupCodes"><i class="ti ti-download"></i> {{ i18n.ts.download }}</MkButton>
 								</div>
 							</MkFolder>
 						</div>
@@ -107,6 +103,7 @@ import MkKeyValue from '@/components/MkKeyValue.vue';
 import MkInput from '@/components/MkInput.vue';
 import { i18n } from '@/i18n.js';
 import * as os from '@/os.js';
+import * as config from '@/config.js';
 import MkFolder from '@/components/MkFolder.vue';
 import MkInfo from '@/components/MkInfo.vue';
 import { confetti } from '@/scripts/confetti.js';
@@ -131,7 +128,8 @@ const token = ref<string | number | null>(null);
 const backupCodes = ref<string[]>();
 
 function cancel() {
-	dialog.value.close();
+	if (page.value !== 2) dialog.value?.close();
+	else allDone();
 }
 
 async function tokenDone() {
@@ -150,15 +148,27 @@ async function tokenDone() {
 
 function downloadBackupCodes() {
 	if (backupCodes.value !== undefined) {
-		const txtBlob = new Blob([backupCodes.value.join('\n')], { type: 'text/plain' });
+		const txtBlob = new Blob([backupCodes.value.reduce((acc, code, i) => `${acc}#${i + 1}. ${code}\r\n`, `${config.hostname} 2FA Backup Codes\r\n\r\n`)], { type: 'text/plain' });
 		const dummya = document.createElement('a');
 		dummya.href = URL.createObjectURL(txtBlob);
-		dummya.download = `${$i.username}-2fa-backup-codes.txt`;
+		dummya.download = `${config.hostname}-${$i.username}-2fa-backup-codes.txt`;
 		dummya.click();
 	}
 }
 
-function allDone() {
+async function allDone() {
+	const { canceled } = await os.confirm({
+		type: 'warning',
+		title: i18n.ts._2fa.backupCodesSavedConfirmTitle,
+		text: i18n.ts._2fa.backupCodesSavedConfirmDescription,
+		switchLabel: i18n.ts._2fa.backupCodesSavedConfirmChecked,
+		okText: i18n.ts.gotIt,
+		okWaitInitiate: 'switch',
+		okWaitDuration: 5,
+	});
+
+	if (canceled) return;
+
 	dialog.value.close();
 }
 </script>
diff --git a/packages/frontend/src/pages/settings/2fa.vue b/packages/frontend/src/pages/settings/2fa.vue
index 4df544e7f..2e2377a03 100644
--- a/packages/frontend/src/pages/settings/2fa.vue
+++ b/packages/frontend/src/pages/settings/2fa.vue
@@ -25,13 +25,11 @@ SPDX-License-Identifier: AGPL-3.0-only
 				<MkInfo>
 					<Mfm :text="i18n.tsx._2fa.howto2fa({ link: `[${i18n.ts.here}](https://go.misskey.io/howto-2fa)`})"/>
 				</MkInfo>
+				<MkInfo v-if="$i.securityKeysList.length > 0">{{ i18n.ts._2fa.whyTOTPOnlyRenew }}</MkInfo>
 
 				<div v-if="$i.twoFactorEnabled" class="_gaps_s">
 					<div v-text="i18n.ts._2fa.alreadyRegistered"/>
-					<template v-if="$i.securityKeysList.length > 0">
-						<MkButton @click="renewTOTP">{{ i18n.ts._2fa.renewTOTP }}</MkButton>
-						<MkInfo>{{ i18n.ts._2fa.whyTOTPOnlyRenew }}</MkInfo>
-					</template>
+					<MkButton v-if="$i.securityKeysList.length > 0" @click="renewTOTP">{{ i18n.ts._2fa.renewTOTP }}</MkButton>
 					<MkButton v-else danger @click="unregisterTOTP">{{ i18n.ts.unregister }}</MkButton>
 				</div>