diff --git a/city-symbol/index.ts b/city-symbol/index.ts
index dccead16..07b22cbc 100644
--- a/city-symbol/index.ts
+++ b/city-symbol/index.ts
@@ -349,7 +349,7 @@ const getCityInformation = async (city: CitySymbol): Promise<CityInformation> =>
 	};
 };
 
-const getRandomCitySymbol = async (prefList: PrefectureKanji[] = Object.keys(prefectures) as PrefectureKanji[], allowEasterEgg: boolean = true): Promise<City> => {
+const getRandomCitySymbol = async (prefList: PrefectureKanji[] = Object.keys(prefectures) as PrefectureKanji[], allowEasterEgg = true): Promise<City> => {
 	if (allowEasterEgg) {
 		if (Math.random() < 1 / 1719) {
 			return {
@@ -465,12 +465,11 @@ class CitySymbolAteQuiz extends AteQuiz {
 			}
 			return 10;
 		}
-		else {
-			if (hintIndex === 0) {
-				return 45;
-			}
-			return 10;
+
+		if (hintIndex === 0) {
+			return 45;
 		}
+		return 10;
 	}
 }
 
@@ -484,25 +483,25 @@ export default (slackClients: SlackInterface) => {
 
 		mutex.runExclusive(async () => {
 			try {
-				let matches;
+				let matches: RegExpMatchArray = null;
 				if (
 					message.text &&
-					(matches = message.text.match(/^(?:市?区?町?村?)章当てクイズ\s?(?<pref>\p{sc=Han}+[都道府県])?$/u))
+					(matches = (message.text as string).match(/^(?:市?区?町?村?)章当てクイズ\s?(?<pref>\p{sc=Han}+[都道府県])?$/u))
 				) {
-					const prefecture = matches?.groups?.pref;
+					const prefectureSpecified = matches?.groups?.pref;
 
-					if (prefecture && !Object.hasOwn(prefectures, prefecture)) {
+					if (prefectureSpecified && !Object.hasOwn(prefectures, prefectureSpecified)) {
 						await slackClients.webClient.chat.postMessage({
 							channel: message.channel,
-							text: `${prefecture}という都道府県は存在しないよ:angry:`,
+							text: `${prefectureSpecified}という都道府県は存在しないよ:angry:`,
 							username: '市章当てクイズ',
 							icon_emoji: ':cityscape:',
 						});
 						return;
 					}
 
-					const needPrefHint = !prefecture;
-					const city = prefecture ? await getRandomCitySymbol([prefecture as PrefectureKanji], false) : await getRandomCitySymbol();
+					const needPrefHint = !prefectureSpecified;
+					const city = prefectureSpecified ? await getRandomCitySymbol([prefectureSpecified as PrefectureKanji], false) : await getRandomCitySymbol();
 					const quizText = 'この市区町村章ど～こだ？';
 					const imageUrl = getWikimediaImageUrl(sample(city.files));
 					const correctAnswers = getCorrectAnswers(city);
@@ -667,23 +666,33 @@ export default (slackClients: SlackInterface) => {
 					};
 
 					const quiz = new CitySymbolAteQuiz(slackClients, problem, {
-						username: '市章当てクイズ' + (prefecture ? ` (${prefecture})` : ''),
+						username: `市章当てクイズ${prefectureSpecified ? ` (${prefectureSpecified})` : ''}`,
 						icon_emoji: ':cityscape:',
 					});
 					quiz.hasPrefHint = needPrefHint;
 					const result = await quiz.start();
 
-					if (result.state === 'solved' && !prefecture) {
+					const hintCount = result.hintIndex + (prefectureSpecified ? 1 : 0);
+
+					if (result.state === 'solved') {
 						await increment(result.correctAnswerer, 'city-symbol-answer');
-						if (result.hintIndex === 0) {
+						if (hintCount === 0) {
 							await increment(result.correctAnswerer, 'city-symbol-answer-no-hint');
 						}
-						if (result.hintIndex <= 1) {
+						if (hintCount <= 1) {
 							await increment(result.correctAnswerer, 'city-symbol-answer-no-chatgpt-hint');
 						}
-					}
-					if (city.cityName === '博多市') {
-						await increment(result.correctAnswerer, 'city-symbol-answer-hakatashi');
+						if (city.cityName === '博多市') {
+							await increment(result.correctAnswerer, 'city-symbol-answer-hakatashi');
+						} else {
+							await increment(result.correctAnswerer, `city-symbol-answer-${city.prefectureName}`);
+							if (hintCount === 0) {
+								await increment(result.correctAnswerer, `city-symbol-answer-no-hint-${city.prefectureName}`);
+							}
+							if (hintCount <= 1) {
+								await increment(result.correctAnswerer, `city-symbol-answer-no-chatgpt-hint-${city.prefectureName}`);
+							}
+						}
 					}
 				}
 			} catch (error) {