・Set the response time per prefecture on the start page (1s to 99s)
・Use the “Start” button to transition to the game screen
・Images of prefectures are gradually displayed randomly at each set response time.
・When you know the prefecture name, press the prefecture name button, and if the answer is correct, you will receive +100 points and move on to the next prefecture.
If you make a mistake, you will receive -10 points, and if you answer correctly or reach the answer time, you will move on to the next prefecture.
・When all 47 randomly displayed prefectures are completed, you will be redirected to the results screen.
・On the result screen, number of correct answer prefectures * 100 points Number of incorrect answer button presses * (-10 points)
The shorter the elapsed time, the more points will be added and the final score will be displayed.
Correct answer prefecture ⇒ Red Incorrect answer prefecture ⇒ White

・Hint balls appear when each prefecture's display is 90°, 180°, or 270°
If you can click on the moving hint ball,
A hint about the displayed prefecture will appear.
・Hint content: 90° ⇒ Latitude, longitude, specialty products, tourist spots
　　　　　　180° ⇒Mountain name, river name, lake/pond, number of bordering prefectures
　　　　　　270° ⇒Prefectural capital, population, area, population density
・For the hint content, click the hint button on the top right of the homepage to access the hint content page.
It will move to , so you can check it there.

・It is a free app
・No ads
・You can learn about social studies, especially geography.
・Useful for people who want to know more about Japanese maps
・Prefectural capital, special products, tourist spots, mountains, rivers, lakes, ponds, etc.
You can learn about the characteristics of each prefecture through games.
・You can learn the characteristics of each prefecture by looking at the hint page

Guess the Name of Each Prefecture Based on Its Shape
- On the start page, set the answer time per prefecture (1s–99s).
- Press the "Start" button to transition to the game screen.
- The image of a randomly selected prefecture will gradually appear according to the set answer time.
- Once you recognize the prefecture, press the Prefecture Name Button.
- If correct: +100 points, move to the next prefecture.
- If incorrect: -10 points, and the game continues until the correct answer is given or the time limit is reached.
- After all 47 prefectures have been completed, the results screen is displayed.
-Final score calculation:
- Number of correct prefectures × 100 points
- Number of incorrect answers × (-10 points)
- Shorter elapsed time results in a higher score.
- Correct prefectures are displayed in red, incorrect ones in white.
Hint System
- A Hint Ball appears when the prefecture is displayed at 90°, 180°, or 270° rotation.
- Clicking the moving Hint Ball will reveal a clue about the prefecture.
- Hint details:
- 90° → Latitude, longitude, local specialties, tourist attractions.
- 180° → Mountain names, river names, lakes, ponds, number of neighboring prefectures.
- 270° → Prefecture capital, population, area, population density.
- Hint details can be checked on the Hint Page, accessible via the Hint Button at the top right of the homepage.

Additional Information
- This app is free.
- No advertisements.
- You can study social sciences, especially geography.
- Useful for those who want to learn more about Japan’s map.
- Learn about prefecture capitals, local specialties, tourist attractions, mountains, rivers, lakes, ponds, etc., through gameplay.
- Review prefecture characteristics using the Hint Page.