diff --git a/src/backend/controllers/admin.ts b/src/backend/controllers/admin.ts
index cf03482..f9e63cc 100644
--- a/src/backend/controllers/admin.ts
+++ b/src/backend/controllers/admin.ts
@@ -1,10 +1,13 @@
 /**
- * バージョン情報など、サーバーのメタデータを返すAPI
+ * Admin API
  * @author Xeltica
  */
 
-import { Get, JsonController } from 'routing-controllers';
+import { BadRequestError, CurrentUser, Get, JsonController, OnUndefined, Post } from 'routing-controllers';
+import { IUser } from '../../common/types/user';
 import { config } from '../../config';
+import { work } from '../services/worker';
+import * as Store from '../store';
 
  @JsonController('/admin')
 export class AdminController {
@@ -15,4 +18,24 @@ export class AdminController {
 			acct: `@${username}@${host}`,
 		};
 	}
+
+	@Get('/misshai/error') getMisshaiError(@CurrentUser({ required: true }) user: IUser) {
+		if (!user.isAdmin) {
+			throw new BadRequestError('Not an Admin');
+		}
+
+		return Store.getState().misshaiWorkerRecentError;
+	}
+
+	@OnUndefined(204)
+	@Post('/misshai/start') startMisshai(@CurrentUser({ required: true }) user: IUser) {
+		if (!user.isAdmin) {
+			throw new BadRequestError('Not an Admin');
+		}
+		if (Store.getState().nowCalculating) {
+			throw new BadRequestError('Already started');
+		}
+
+		work();
+	}
 }
diff --git a/src/backend/services/worker.ts b/src/backend/services/worker.ts
index 1dd3e53..4718f9e 100644
--- a/src/backend/services/worker.ts
+++ b/src/backend/services/worker.ts
@@ -13,9 +13,13 @@ import * as Store from '../store';
 import { User } from '../models/entities/user';
 
 export default (): void => {
-	cron.schedule('0 0 0 * * *', async () => {
-		Store.dispatch({ nowCalculating: true });
+	cron.schedule('0 0 0 * * *', work);
+};
 
+export const work = async () => {
+	Store.dispatch({ nowCalculating: true });
+
+	try {
 		const users = await Users.find({ alertMode: Not<AlertMode>('nothing') });
 		for (const user of users) {
 			await update(user).catch(e => handleError(user, e));
@@ -24,9 +28,13 @@ export default (): void => {
 				return delay(3000);
 			}
 		}
-
+		Store.dispatch({ misshaiWorkerRecentError: null });
+	} catch (e) {
+		const msg = String(e instanceof Error ? e.stack : e);
+		Store.dispatch({ misshaiWorkerRecentError: msg });
+	} finally {
 		Store.dispatch({ nowCalculating: false });
-	});
+	}
 };
 
 /**
diff --git a/src/backend/store.ts b/src/backend/store.ts
index e24a0bc..7291067 100644
--- a/src/backend/store.ts
+++ b/src/backend/store.ts
@@ -7,6 +7,7 @@
  */
 const defaultState: State = {
 	nowCalculating: false,
+	misshaiWorkerRecentError: null,
 };
 
 let _state: Readonly<State> = defaultState;
@@ -16,6 +17,7 @@ let _state: Readonly<State> = defaultState;
  */
 export type State = {
 	nowCalculating: boolean,
+	misshaiWorkerRecentError: string | null,
 };
 
 /**
diff --git a/src/frontend/components/AdminPage.tsx b/src/frontend/components/AdminPage.tsx
index b48d424..5df8744 100644
--- a/src/frontend/components/AdminPage.tsx
+++ b/src/frontend/components/AdminPage.tsx
@@ -6,6 +6,7 @@ import { Skeleton } from './Skeleton';
 import { IAnnouncement } from '../../common/types/announcement';
 import { $delete, $get, $post, $put } from '../misc/api';
 import { Card } from './Card';
+import { showModal } from '../store/slices/screen';
 
 
 export const AdminPage: React.VFC = () => {
@@ -19,6 +20,8 @@ export const AdminPage: React.VFC = () => {
 	const [draftTitle, setDraftTitle] = useState('');
 	const [draftBody, setDraftBody] = useState('');
 
+	const [misshaiError, setMisshaiError] = useState<string | null>(null);
+
 	const submitAnnouncement = async () => {
 		if (selectedAnnouncement) {
 			await $put('announcements', {
@@ -52,6 +55,22 @@ export const AdminPage: React.VFC = () => {
 			setAnnouncements(announcements ?? []);
 			setAnnouncementsLoaded(true);
 		});
+		$get<string | null>('admin/misshai/error').then(setMisshaiError);
+	};
+
+	const onClickStartMisshaiAlertWorkerButton = () => {
+		$post('admin/misshai/start').then(() => {
+			dispatch(showModal({
+				type: 'dialog',
+				message: '開始',
+			}));
+		}).catch((e) => {
+			dispatch(showModal({
+				type: 'dialog',
+				icon: 'error',
+				message: e.message,
+			}));
+		});
 	};
 
 	/**
@@ -166,6 +185,16 @@ export const AdminPage: React.VFC = () => {
 								)}
 							</Card>
 						</article>
+						<article>
+							<h2>Misshai</h2>
+							<div className="vstack">
+								<button className="btn danger" onClick={onClickStartMisshaiAlertWorkerButton}>
+									ミス廃アラートワーカーを強制起動する
+								</button>
+								<h3>直近のワーカーエラー</h3>
+								<pre><code>{misshaiError ?? 'なし'}</code></pre>
+							</div>
+						</article>
 					</>
 				)
 			}
@@ -174,3 +203,7 @@ export const AdminPage: React.VFC = () => {
 };
 
 
+function dispatch(arg0: any) {
+	throw new Error('Function not implemented.');
+}
+