diff --git a/packages/backend/src/remote/activitypub/models/person.ts b/packages/backend/src/remote/activitypub/models/person.ts
index 84907558b..59b0dad69 100644
--- a/packages/backend/src/remote/activitypub/models/person.ts
+++ b/packages/backend/src/remote/activitypub/models/person.ts
@@ -604,9 +604,11 @@ export async function updatePerson(
 		{
 			url: url,
 			fields,
-			description: person.summary
-				? await htmlToMfm(truncate(person.summary, summaryLength), person.tag)
-				: null,
+			description: person._misskey_summary
+				? truncate(person._misskey_summary, summaryLength)
+				: person.summary
+					? await htmlToMfm(truncate(person.summary, summaryLength), person.tag)
+					: null,
 			birthday: bday ? bday[0] : null,
 			location: person["vcard:Address"] || null,
 		},
diff --git a/packages/backend/src/remote/activitypub/renderer/index.ts b/packages/backend/src/remote/activitypub/renderer/index.ts
index 7b98cf2d7..a688b1194 100644
--- a/packages/backend/src/remote/activitypub/renderer/index.ts
+++ b/packages/backend/src/remote/activitypub/renderer/index.ts
@@ -41,6 +41,7 @@ export const renderActivity = (x: any): IActivity | null => {
 					_misskey_reaction: "misskey:_misskey_reaction",
 					_misskey_votes: "misskey:_misskey_votes",
 					_misskey_talk: "misskey:_misskey_talk",
+					_misskey_summary: "misskey:_misskey_summary",
 					isCat: "misskey:isCat",
 					// Fedibird
 					fedibird: "http://fedibird.com/ns#",
diff --git a/packages/backend/src/remote/activitypub/renderer/person.ts b/packages/backend/src/remote/activitypub/renderer/person.ts
index 7046ab066..a40269bcb 100644
--- a/packages/backend/src/remote/activitypub/renderer/person.ts
+++ b/packages/backend/src/remote/activitypub/renderer/person.ts
@@ -75,6 +75,7 @@ export async function renderPerson(user: ILocalUser) {
 		summary: profile.description
 			? await toHtml(mfm.parse(profile.description), profile.mentions, profile.userHost)
 			: null,
+		_misskey_summary: profile.description,
 		icon: avatar ? renderImage(avatar) : null,
 		image: banner ? renderImage(banner) : null,
 		tag,
diff --git a/packages/backend/src/remote/activitypub/type.ts b/packages/backend/src/remote/activitypub/type.ts
index 45002ef60..7b54b2320 100644
--- a/packages/backend/src/remote/activitypub/type.ts
+++ b/packages/backend/src/remote/activitypub/type.ts
@@ -206,6 +206,7 @@ export interface IActor extends IObject {
 	};
 	"vcard:bday"?: string;
 	"vcard:Address"?: string;
+	_misskey_summary?: string;
 }
 
 export const isCollection = (object: IObject): object is ICollection =>