diff --git a/packages/backend/src/misc/get-note-summary.ts b/packages/backend/src/misc/get-note-summary.ts
index 3f35ccee8..45fb50964 100644
--- a/packages/backend/src/misc/get-note-summary.ts
+++ b/packages/backend/src/misc/get-note-summary.ts
@@ -9,10 +9,6 @@ export const getNoteSummary = (note: Packed<'Note'>): string => {
 		return `(❌⛔)`;
 	}
 
-	if (note.isHidden) {
-		return `(⛔)`;
-	}
-
 	let summary = '';
 
 	// 本文
diff --git a/packages/backend/src/models/schema/note.ts b/packages/backend/src/models/schema/note.ts
index cdf4b9a54..292bbb82f 100644
--- a/packages/backend/src/models/schema/note.ts
+++ b/packages/backend/src/models/schema/note.ts
@@ -52,10 +52,6 @@ export const packedNoteSchema = {
 			optional: true, nullable: true,
 			ref: 'Note',
 		},
-		isHidden: {
-			type: 'boolean',
-			optional: true, nullable: false,
-		},
 		visibility: {
 			type: 'string',
 			optional: false, nullable: false,
diff --git a/packages/client/src/components/note-detailed.vue b/packages/client/src/components/note-detailed.vue
index e7bbd70a2..072db16e3 100644
--- a/packages/client/src/components/note-detailed.vue
+++ b/packages/client/src/components/note-detailed.vue
@@ -54,7 +54,6 @@
 				</p>
 				<div v-show="appearNote.cw == null || showContent" class="content">
 					<div class="text">
-						<span v-if="appearNote.isHidden" style="opacity: 0.5">({{ i18n.ts.private }})</span>
 						<MkA v-if="appearNote.replyId" class="reply" :to="`/notes/${appearNote.replyId}`"><i class="fas fa-reply"></i></MkA>
 						<Mfm v-if="appearNote.text" :text="appearNote.text" :author="appearNote.user" :i="$i" :custom-emojis="appearNote.emojis"/>
 						<a v-if="appearNote.renote != null" class="rp">RN:</a>
diff --git a/packages/client/src/components/note.vue b/packages/client/src/components/note.vue
index e6a35fe41..eaead8e78 100644
--- a/packages/client/src/components/note.vue
+++ b/packages/client/src/components/note.vue
@@ -43,7 +43,6 @@
 				</p>
 				<div v-show="appearNote.cw == null || showContent" class="content" :class="{ collapsed, isLong }">
 					<div class="text">
-						<span v-if="appearNote.isHidden" style="opacity: 0.5">({{ i18n.ts.private }})</span>
 						<MkA v-if="appearNote.replyId" class="reply" :to="`/notes/${appearNote.replyId}`"><i class="fas fa-reply"></i></MkA>
 						<Mfm v-if="appearNote.text" :text="appearNote.text" :author="appearNote.user" :i="$i" :custom-emojis="appearNote.emojis"/>
 						<a v-if="appearNote.renote != null" class="rp">RN:</a>
diff --git a/packages/client/src/components/sub-note-content.vue b/packages/client/src/components/sub-note-content.vue
index 25ab883f4..9ee180345 100644
--- a/packages/client/src/components/sub-note-content.vue
+++ b/packages/client/src/components/sub-note-content.vue
@@ -1,7 +1,6 @@
 <template>
 <div class="wrmlmaau" :class="{ collapsed }">
 	<div class="body">
-		<span v-if="note.isHidden" style="opacity: 0.5">({{ i18n.ts.private }})</span>
 		<span v-if="note.deletedAt" style="opacity: 0.5">({{ i18n.ts.deleted }})</span>
 		<MkA v-if="note.replyId" class="reply" :to="`/notes/${note.replyId}`"><i class="fas fa-reply"></i></MkA>
 		<Mfm v-if="note.text" :text="note.text" :author="note.user" :i="$i" :custom-emojis="note.emojis"/>
diff --git a/packages/client/src/scripts/get-note-summary.ts b/packages/client/src/scripts/get-note-summary.ts
index d57e1c302..348351206 100644
--- a/packages/client/src/scripts/get-note-summary.ts
+++ b/packages/client/src/scripts/get-note-summary.ts
@@ -10,10 +10,6 @@ export const getNoteSummary = (note: misskey.entities.Note): string => {
 		return `(${i18n.ts.deletedNote})`;
 	}
 
-	if (note.isHidden) {
-		return `(${i18n.ts.invisibleNote})`;
-	}
-
 	let summary = '';
 
 	// 本文