diff --git a/README.md b/README.md
index c9d106aca..38aada437 100644
--- a/README.md
+++ b/README.md
@@ -32,6 +32,8 @@
 
 ## 細かい変更点
 
+- 身バレ防止の設定を追加
+  - 「おかえりなさい、◯◯さん」が出ないようにできるように
 - ユーザーページのデフォルトのタブを「投稿と返信」に変更
 - タイムラインにリプライを表示する設定をデフォルトで有効に
 - 未読通知のタブをリアクションの通知を表示するタブに変更
diff --git a/locales/en-US.yml b/locales/en-US.yml
index 8deeff692..833e2e630 100644
--- a/locales/en-US.yml
+++ b/locales/en-US.yml
@@ -2144,3 +2144,5 @@ _emojiModPerm:
   add: "Add"
   mod: "Add and Edit"
   full: "Allow All"
+privacyForNerds: "Privacy protection in public places"
+disableToast: "Don't show the \"Welcome back\" banner"
diff --git a/locales/ja-JP.yml b/locales/ja-JP.yml
index 6c80e7eca..48c8319c8 100644
--- a/locales/ja-JP.yml
+++ b/locales/ja-JP.yml
@@ -1999,3 +1999,5 @@ _emojiModPerm:
 importZip: ZIPをインポート
 emojiPackCreator: 絵文字パックの作者
 exportZip: ZIPをエクスポート
+privacyForNerds: "身バレ防止"
+disableToast: "「おかえりなさい、◯◯さん」を表示しない"
diff --git a/packages/client/src/init.ts b/packages/client/src/init.ts
index c416b6f06..5d4f304b0 100644
--- a/packages/client/src/init.ts
+++ b/packages/client/src/init.ts
@@ -436,19 +436,21 @@ function checkForSplash() {
 			});
 		}
 
-		const lastUsed = localStorage.getItem("lastUsed");
-		if (lastUsed) {
-			const lastUsedDate = parseInt(lastUsed, 10);
-			// 二時間以上前なら
-			if (Date.now() - lastUsedDate > 1000 * 60 * 60 * 2) {
-				toast(
-					i18n.t("welcomeBackWithName", {
-						name: $i.name || $i.username,
-					}),
-				);
+		if (!defaultStore.state.disableToast) {
+			const lastUsed = localStorage.getItem("lastUsed");
+			if (lastUsed) {
+				const lastUsedDate = parseInt(lastUsed, 10);
+				// 二時間以上前なら
+				if (Date.now() - lastUsedDate > 1000 * 60 * 60 * 2) {
+					toast(
+						i18n.t("welcomeBackWithName", {
+							name: $i.name || $i.username,
+						}),
+					);
+				}
 			}
+			localStorage.setItem("lastUsed", Date.now().toString());
 		}
-		localStorage.setItem("lastUsed", Date.now().toString());
 
 		const latestDonationInfoShownAt = localStorage.getItem(
 			"latestDonationInfoShownAt",
diff --git a/packages/client/src/pages/settings/general.vue b/packages/client/src/pages/settings/general.vue
index caf2d13a5..1afeb91cc 100644
--- a/packages/client/src/pages/settings/general.vue
+++ b/packages/client/src/pages/settings/general.vue
@@ -262,6 +262,16 @@
 			>
 		</FormSection>
 
+		<FormSection>
+			<template #label>{{ i18n.ts.privacyForNerds }}</template>
+			<FormSwitch v-model="disableToast" class="_formBlock"
+				>{{ i18n.ts.disableToast
+				}}<span class="_beta">{{
+					i18n.ts.originalFeature
+				}}</span></FormSwitch
+			>
+		</FormSection>
+
 		<FormSection>
 			<template #label>{{ i18n.ts.forMobile }}</template>
 			<FormSwitch
@@ -439,6 +449,7 @@ const showBigPostButton = computed(
 const emphasizeFollowed = computed(
 	defaultStore.makeGetterSetter("emphasizeFollowed"),
 );
+const disableToast = computed(defaultStore.makeGetterSetter("disableToast"));
 
 watch(swipeOnDesktop, () => {
 	defaultStore.set("swipeOnMobile", true);
diff --git a/packages/client/src/store.ts b/packages/client/src/store.ts
index 45c77412e..d0c5a18b8 100644
--- a/packages/client/src/store.ts
+++ b/packages/client/src/store.ts
@@ -373,6 +373,10 @@ export const defaultStore = markRaw(
 			where: "deviceAccount",
 			default: true,
 		},
+		disableToast: {
+			where: "device",
+			default: false,
+		},
 	}),
 );