diff --git a/CHANGELOG.md b/CHANGELOG.md
index 46dd2dd20..438436f01 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -43,6 +43,8 @@
 - ロール設定画面でロールIDを確認できるように
 - コンテキストメニュー表示時のパフォーマンスを改善
 - フォロー/フォロワー非公開時の表示を改善
+- 本文にMFMが含まれている場合に自動でたたまれる機能が、返信先や引用RNにも適用されるように
+  - position は対象外になりました
 - AiScriptを0.15.0に更新
 - Fix: サーバーメトリクスが90度傾いている
 - Fix: 非ログイン時にクレデンシャルが必要なページに行くとエラーが出る問題を修正
diff --git a/packages/frontend/src/components/MkNote.vue b/packages/frontend/src/components/MkNote.vue
index 7a7406931..deeae6e94 100644
--- a/packages/frontend/src/components/MkNote.vue
+++ b/packages/frontend/src/components/MkNote.vue
@@ -165,6 +165,7 @@ import { getNoteSummary } from '@/scripts/get-note-summary';
 import { MenuItem } from '@/types/menu';
 import MkRippleEffect from '@/components/MkRippleEffect.vue';
 import { showMovedDialog } from '@/scripts/show-moved-dialog';
+import { shouldCollapsed } from '@/scripts/collapsed';
 
 const props = defineProps<{
 	note: misskey.entities.Note;
@@ -204,17 +205,7 @@ let appearNote = $computed(() => isRenote ? note.renote as misskey.entities.Note
 const isMyRenote = $i && ($i.id === note.userId);
 const showContent = ref(false);
 const urls = appearNote.text ? extractUrlFromMfm(mfm.parse(appearNote.text)) : null;
-const isLong = (appearNote.cw == null && appearNote.text != null && (
-	(appearNote.text.includes('$[x2')) ||
-	(appearNote.text.includes('$[x3')) ||
-	(appearNote.text.includes('$[x4')) ||
-	(appearNote.text.includes('$[scale')) ||
-	(appearNote.text.includes('$[position')) ||
-	(appearNote.text.split('\n').length > 9) ||
-	(appearNote.text.length > 500) ||
-	(appearNote.files.length >= 5) ||
-	(urls && urls.length >= 4)
-));
+const isLong = shouldCollapsed(appearNote);
 const collapsed = ref(appearNote.cw == null && isLong);
 const isDeleted = ref(false);
 const muted = ref(checkWordMute(appearNote, $i, defaultStore.state.mutedWords));
diff --git a/packages/frontend/src/components/MkSubNoteContent.vue b/packages/frontend/src/components/MkSubNoteContent.vue
index c76ce7315..3a032a116 100644
--- a/packages/frontend/src/components/MkSubNoteContent.vue
+++ b/packages/frontend/src/components/MkSubNoteContent.vue
@@ -31,16 +31,13 @@ import MkMediaList from '@/components/MkMediaList.vue';
 import MkPoll from '@/components/MkPoll.vue';
 import { i18n } from '@/i18n';
 import { $i } from '@/account';
+import { shouldCollapsed } from '@/scripts/collapsed';
 
 const props = defineProps<{
 	note: misskey.entities.Note;
 }>();
 
-const isLong =
-	props.note.cw == null && props.note.text != null && (
-		(props.note.text.split('\n').length > 9) ||
-		(props.note.text.length > 500)
-	);
+const isLong = shouldCollapsed(props.note);
 
 const collapsed = $ref(isLong);
 </script>
diff --git a/packages/frontend/src/scripts/collapsed.ts b/packages/frontend/src/scripts/collapsed.ts
new file mode 100644
index 000000000..1bf56f233
--- /dev/null
+++ b/packages/frontend/src/scripts/collapsed.ts
@@ -0,0 +1,19 @@
+import * as mfm from 'mfm-js';
+import * as misskey from 'misskey-js';
+import { extractUrlFromMfm } from './extract-url-from-mfm';
+
+export function shouldCollapsed(note: misskey.entities.Note): boolean {
+	const urls = note.text ? extractUrlFromMfm(mfm.parse(note.text)) : null;
+	const collapsed = note.cw == null && note.text != null && (
+		(note.text.includes('$[x2')) ||
+		(note.text.includes('$[x3')) ||
+		(note.text.includes('$[x4')) ||
+		(note.text.includes('$[scale')) ||
+		(note.text.split('\n').length > 9) ||
+		(note.text.length > 500) ||
+		(note.files.length >= 5) ||
+		(!!urls && urls.length >= 4)
+	);
+
+	return collapsed;
+}