diff --git a/locales/index.d.ts b/locales/index.d.ts
index f9fcbdb238..a22a8e893e 100644
--- a/locales/index.d.ts
+++ b/locales/index.d.ts
@@ -13257,6 +13257,10 @@ export interface Locale extends ILocale {
      * ActivityPub user data in its raw form. These fields are public and accessible to other instances.
      */
     "rawApDescription": string;
+    /**
+     * Signup Reason
+     */
+    "signupReason": string;
 }
 declare const locales: {
     [lang: string]: Locale;
diff --git a/packages/backend/src/models/json-schema/user.ts b/packages/backend/src/models/json-schema/user.ts
index 2e5364f404..1678cab067 100644
--- a/packages/backend/src/models/json-schema/user.ts
+++ b/packages/backend/src/models/json-schema/user.ts
@@ -73,6 +73,16 @@ export const packedUserLiteSchema = {
 			type: 'string',
 			nullable: true, optional: false,
 		},
+		description: {
+			type: 'string',
+			nullable: true, optional: false,
+			example: 'Hi masters, I am Ai!',
+		},
+		createdAt: {
+			type: 'string',
+			nullable: false, optional: false,
+			format: 'date-time',
+		},
 		avatarDecorations: {
 			type: 'array',
 			nullable: false, optional: false,
@@ -278,11 +288,6 @@ export const packedUserDetailedNotMeOnlySchema = {
 				nullable: false, optional: false,
 			},
 		},
-		createdAt: {
-			type: 'string',
-			nullable: false, optional: false,
-			format: 'date-time',
-		},
 		updatedAt: {
 			type: 'string',
 			nullable: true, optional: false,
@@ -324,11 +329,6 @@ export const packedUserDetailedNotMeOnlySchema = {
 			nullable: false, optional: false,
 			example: false,
 		},
-		description: {
-			type: 'string',
-			nullable: true, optional: false,
-			example: 'Hi masters, I am Ai!',
-		},
 		location: {
 			type: 'string',
 			nullable: true, optional: false,
diff --git a/packages/backend/src/server/api/endpoints/admin/show-user.ts b/packages/backend/src/server/api/endpoints/admin/show-user.ts
index 6a77fc177f..6f0081f1f7 100644
--- a/packages/backend/src/server/api/endpoints/admin/show-user.ts
+++ b/packages/backend/src/server/api/endpoints/admin/show-user.ts
@@ -221,6 +221,10 @@ export const meta = {
 					},
 				},
 			},
+			signupReason: {
+				type: 'string',
+				optional: false, nullable: true,
+			},
 		},
 	},
 } as const;
diff --git a/packages/frontend/src/components/SkApprovalUser.vue b/packages/frontend/src/components/SkApprovalUser.vue
index 310d044387..3f5bd345f2 100644
--- a/packages/frontend/src/components/SkApprovalUser.vue
+++ b/packages/frontend/src/components/SkApprovalUser.vue
@@ -19,7 +19,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 				<div>{{ email }}</div>
 			</div>
 			<div>
-				<div :class="$style.label">Reason</div>
+				<div :class="$style.label">{{ i18n.ts.signupReason }}</div>
 				<div>{{ reason }}</div>
 			</div>
 		</div>
diff --git a/packages/frontend/src/pages/admin-user.vue b/packages/frontend/src/pages/admin-user.vue
index 840eff77dd..dc29ae2f80 100644
--- a/packages/frontend/src/pages/admin-user.vue
+++ b/packages/frontend/src/pages/admin-user.vue
@@ -130,6 +130,11 @@ SPDX-License-Identifier: AGPL-3.0-only
 					</div>
 				</FormSection>
 
+				<FormSection v-else-if="info.signupReason">
+					<template #label>{{ i18n.ts.signupReason }}</template>
+					{{ info.signupReason }}
+				</FormSection>
+
 				<FormSection v-if="!isSystem && user && iAmModerator">
 					<div class="_gaps">
 						<MkSwitch v-model="silenced" @update:modelValue="toggleSilence">{{ i18n.ts.silence }}</MkSwitch>
diff --git a/packages/misskey-js/src/autogen/types.ts b/packages/misskey-js/src/autogen/types.ts
index 6cb52fcbea..8debdec9c1 100644
--- a/packages/misskey-js/src/autogen/types.ts
+++ b/packages/misskey-js/src/autogen/types.ts
@@ -4246,6 +4246,10 @@ export type components = {
       /** Format: url */
       avatarUrl: string | null;
       avatarBlurhash: string | null;
+      /** @example Hi masters, I am Ai! */
+      description: string | null;
+      /** Format: date-time */
+      createdAt: string;
       avatarDecorations: {
           /** Format: id */
           id: string;
@@ -4304,8 +4308,6 @@ export type components = {
       movedTo: string | null;
       alsoKnownAs: string[] | null;
       /** Format: date-time */
-      createdAt: string;
-      /** Format: date-time */
       updatedAt: string | null;
       /** Format: date-time */
       lastFetchedAt: string | null;
@@ -4319,8 +4321,6 @@ export type components = {
       isSilenced: boolean;
       /** @example false */
       isSuspended: boolean;
-      /** @example Hi masters, I am Ai! */
-      description: string | null;
       location: string | null;
       /** @example 2018-03-12 */
       birthday: string | null;
@@ -11236,6 +11236,7 @@ export type operations = {
               remoteFollowing: number;
               remoteFollowers: number;
             };
+            signupReason: string | null;
           };
         };
       };
diff --git a/sharkey-locales/en-US.yml b/sharkey-locales/en-US.yml
index 5ea562d262..3f5c82f2dc 100644
--- a/sharkey-locales/en-US.yml
+++ b/sharkey-locales/en-US.yml
@@ -628,3 +628,5 @@ noteFooterLabel: "Note controls"
 rawUserDescription: "Packed user data in its raw form. Most of these fields are public and visible to all users."
 rawInfoDescription: "Extended user data in its raw form. These fields are private and can only be accessed by moderators."
 rawApDescription: "ActivityPub user data in its raw form. These fields are public and accessible to other instances."
+
+signupReason: "Signup Reason"