diff --git a/CHANGELOG.md b/CHANGELOG.md
index b5d5fad2ab..9055b35cb8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -15,12 +15,13 @@
 ## 13.x.x (unreleased)
 
 ### General
-- identicon生成を無効にしてパフォーマンスを向上させることができるようになりました
-- サーバーのマシン情報の公開を無効にしてパフォーマンスを向上させることができるようになりました
 - 招待機能を改善しました
   * 過去に発行した招待コードを確認できるようになりました  
   * ロールごとに招待コードの発行数制限と制限対象期間、有効期限を設定できるようになりました  
   * 招待コードを作成したユーザーと使用したユーザーを確認できるようになりました  
+- ユーザーにロールが期限付きでアサインされている場合、その期限をユーザーのモデレーションページで確認できるようになりました
+- identicon生成を無効にしてパフォーマンスを向上させることができるようになりました
+- サーバーのマシン情報の公開を無効にしてパフォーマンスを向上させることができるようになりました
 
 ### Client
 - deck UIのカラムのメニューからアンテナとリストの編集画面を開けるように
diff --git a/packages/backend/src/core/RoleService.ts b/packages/backend/src/core/RoleService.ts
index 3b501cf8d7..d065b460c6 100644
--- a/packages/backend/src/core/RoleService.ts
+++ b/packages/backend/src/core/RoleService.ts
@@ -220,14 +220,19 @@ export class RoleService implements OnApplicationShutdown {
 	}
 
 	@bindThis
-	public async getUserRoles(userId: User['id']) {
+	public async getUserAssigns(userId: User['id']) {
 		const now = Date.now();
 		let assigns = await this.roleAssignmentByUserIdCache.fetch(userId, () => this.roleAssignmentsRepository.findBy({ userId }));
 		// 期限切れのロールを除外
 		assigns = assigns.filter(a => a.expiresAt == null || (a.expiresAt.getTime() > now));
-		const assignedRoleIds = assigns.map(x => x.roleId);
+		return assigns;
+	}
+
+	@bindThis
+	public async getUserRoles(userId: User['id']) {
 		const roles = await this.rolesCache.fetch(() => this.rolesRepository.findBy({}));
-		const assignedRoles = roles.filter(r => assignedRoleIds.includes(r.id));
+		const assigns = await this.getUserAssigns(userId);
+		const assignedRoles = roles.filter(r => assigns.map(x => x.roleId).includes(r.id));
 		const user = roles.some(r => r.target === 'conditional') ? await this.cacheService.findUserById(userId) : null;
 		const matchedCondRoles = roles.filter(r => r.target === 'conditional' && this.evalCond(user!, r.condFormula));
 		return [...assignedRoles, ...matchedCondRoles];
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 f49d2a0966..6f805b6b4e 100644
--- a/packages/backend/src/server/api/endpoints/admin/show-user.ts
+++ b/packages/backend/src/server/api/endpoints/admin/show-user.ts
@@ -61,6 +61,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 
 			const signins = await this.signinsRepository.findBy({ userId: user.id });
 
+			const roleAssigns = await this.roleService.getUserAssigns(user.id);
 			const roles = await this.roleService.getUserRoles(user.id);
 
 			return {
@@ -85,6 +86,11 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 				signins,
 				policies: await this.roleService.getUserPolicies(user.id),
 				roles: await this.roleEntityService.packMany(roles, me),
+				roleAssigns: roleAssigns.map(a => ({
+					createdAt: a.createdAt.toISOString(),
+					expiresAt: a.expiresAt ? a.expiresAt.toISOString() : null,
+					roleId: a.roleId,
+				})),
 			};
 		});
 	}
diff --git a/packages/frontend/src/pages/admin/roles.role.vue b/packages/frontend/src/pages/admin/roles.role.vue
index 6cbe7ae658..789c9da277 100644
--- a/packages/frontend/src/pages/admin/roles.role.vue
+++ b/packages/frontend/src/pages/admin/roles.role.vue
@@ -40,7 +40,7 @@
 										</div>
 										<div v-if="expandedItems.includes(item.id)" :class="$style.userItemSub">
 											<div>Assigned: <MkTime :time="item.createdAt" mode="detail"/></div>
-											<div v-if="item.expiresAt">Period: {{ item.expiresAt.toLocaleString() }}</div>
+											<div v-if="item.expiresAt">Period: {{ new Date(item.expiresAt).toLocaleString() }}</div>
 											<div v-else>Period: {{ i18n.ts.indefinitely }}</div>
 										</div>
 									</div>
diff --git a/packages/frontend/src/pages/settings/mute-block.vue b/packages/frontend/src/pages/settings/mute-block.vue
index e0785ab9fe..e1f3c6bed9 100644
--- a/packages/frontend/src/pages/settings/mute-block.vue
+++ b/packages/frontend/src/pages/settings/mute-block.vue
@@ -55,7 +55,7 @@
 						</div>
 						<div v-if="expandedMuteItems.includes(item.id)" :class="$style.userItemSub">
 							<div>Muted at: <MkTime :time="item.createdAt" mode="detail"/></div>
-							<div v-if="item.expiresAt">Period: {{ item.expiresAt.toLocaleString() }}</div>
+							<div v-if="item.expiresAt">Period: {{ new Date(item.expiresAt).toLocaleString() }}</div>
 							<div v-else>Period: {{ i18n.ts.indefinitely }}</div>
 						</div>
 					</div>
@@ -85,7 +85,7 @@
 						</div>
 						<div v-if="expandedBlockItems.includes(item.id)" :class="$style.userItemSub">
 							<div>Blocked at: <MkTime :time="item.createdAt" mode="detail"/></div>
-							<div v-if="item.expiresAt">Period: {{ item.expiresAt.toLocaleString() }}</div>
+							<div v-if="item.expiresAt">Period: {{ new Date(item.expiresAt).toLocaleString() }}</div>
 							<div v-else>Period: {{ i18n.ts.indefinitely }}</div>
 						</div>
 					</div>
diff --git a/packages/frontend/src/pages/user-info.vue b/packages/frontend/src/pages/user-info.vue
index 56e8737e1c..f7650285c7 100644
--- a/packages/frontend/src/pages/user-info.vue
+++ b/packages/frontend/src/pages/user-info.vue
@@ -112,9 +112,17 @@
 						<MkButton v-if="user.host == null && iAmModerator" primary rounded @click="assignRole"><i class="ti ti-plus"></i> {{ i18n.ts.assign }}</MkButton>
 
 						<div v-for="role in info.roles" :key="role.id" :class="$style.roleItem">
-							<MkRolePreview :class="$style.role" :role="role" :forModeration="true"/>
-							<button v-if="role.target === 'manual'" class="_button" :class="$style.roleUnassign" @click="unassignRole(role, $event)"><i class="ti ti-x"></i></button>
-							<button v-else class="_button" :class="$style.roleUnassign" disabled><i class="ti ti-ban"></i></button>
+							<div :class="$style.roleItemMain">
+								<MkRolePreview :class="$style.role" :role="role" :forModeration="true"/>
+								<button class="_button" :class="$style.roleToggle" @click="toggleRoleItem(role)"><i class="ti ti-chevron-down"></i></button>
+								<button v-if="role.target === 'manual'" class="_button" :class="$style.roleUnassign" @click="unassignRole(role, $event)"><i class="ti ti-x"></i></button>
+								<button v-else class="_button" :class="$style.roleUnassign" disabled><i class="ti ti-ban"></i></button>
+							</div>
+							<div v-if="expandedRoles.includes(role.id)" :class="$style.roleItemSub">
+								<div>Assigned: <MkTime :time="info.roleAssigns.find(a => a.roleId === role.id).createdAt" mode="detail"/></div>
+								<div v-if="info.roleAssigns.find(a => a.roleId === role.id).expiresAt">Period: {{ new Date(info.roleAssigns.find(a => a.roleId === role.id).expiresAt).toLocaleString() }}</div>
+								<div v-else>Period: {{ i18n.ts.indefinitely }}</div>
+							</div>
 						</div>
 					</div>
 				</MkFolder>
@@ -220,6 +228,7 @@ const filesPagination = {
 		userId: props.userId,
 	})),
 };
+let expandedRoles = $ref([]);
 
 function createFetcher() {
 	if (iAmModerator) {
@@ -384,6 +393,14 @@ async function unassignRole(role, ev) {
 	}], ev.currentTarget ?? ev.target);
 }
 
+function toggleRoleItem(role) {
+	if (expandedRoles.includes(role.id)) {
+		expandedRoles = expandedRoles.filter(x => x !== role.id);
+	} else {
+		expandedRoles.push(role.id);
+	}
+}
+
 watch(() => props.userId, () => {
 	init = createFetcher();
 }, {
@@ -523,11 +540,22 @@ definePageMetadata(computed(() => ({
 }
 
 .roleItem {
+}
+
+.roleItemMain {
 	display: flex;
 }
 
 .role {
 	flex: 1;
+	min-width: 0;
+	margin-right: 8px;
+}
+
+.roleItemSub {
+	padding: 6px 12px;
+	font-size: 85%;
+	color: var(--fgTransparentWeak);
 }
 
 .roleUnassign {