Prefecture Rush

Prefecture Rush

Quickly identify the highlighted Japanese prefecture by its shape (silhouette)!

Name the highlighted prefecture! Race the clock in a map-shape quiz with 47 choices.

View detailed rules

Answer method

Ranking

Sound Effects

Music

Fullscreen

CollectionCollected 0 / 1410%

Prefectures to practice

Complete 3 runs to see the prefectures you need to practice.

Personal best

Top three times for Player. Each mode’s records are shown separately.

No results yet. Complete a run to record your time here.

Online ranking

Full 47 questions · All time. Ranked by time including mistake penalties; equal times share a rank.

Your Rankings

All Time: No record

Show

No times have been recorded for this period yet.

Full rules

Choose the correct prefecture from 47 answers by looking at its highlighted shape and surrounding geography in this time attack quiz game. There is no time limit, so you can finish at your own pace. Learn prefecture shapes with Weak spots mode, which focuses on prefectures you have answered incorrectly, and enjoy collecting a new item every time you earn 47 points.

Only Full — 47 questions supports online rankings.

Game mode	Questions	Ranking
Full (47 questions)	47	Included
Half (20 questions)	20	Not included
Short (10 questions)	10	Not included
Weak spots (10 questions)	10	Not included

Answers and pausing

Answer buttons are arranged in prefecture code order from 01 to 47.
With a keyboard, you can also answer by entering the two-digit prefecture code. Backspace or ⌫ can clear the first digit; after entering the second digit, the answer cannot be undone.
Each mistake adds 5 seconds to your time. You must answer correctly to advance, even after a mistake. As a hint, a mistake leaves only prefectures in the correct region available to answer.
Pausing stops the timer. Switching away also pauses play. Ending or reloading an unfinished run earns no points.

About Weak spots mode

After you finish three runs, any prefectures you have answered incorrectly unlock Weak spots — 10 questions, which prioritizes those prefectures. Even when playing other modes, making fewer mistakes helps you master a prefecture so it stops being a priority in Weak spots mode. Making more mistakes brings that prefecture back into Weak spots mode.

Collection

Earn a collection item for every 47 points. Each question earns 1 point when you finish the run, doubled for a perfect run. No points are awarded if you quit before finishing.

Game mode	Standard clear	PERFECT
Full (47 questions)	47pt	94pt
Half (20 questions)	20pt	40pt
Short (10 questions)	10pt	20pt
Weak spots (10 questions)	10pt	20pt

Points are shared regardless of the number of questions. Every 47 points unlocks a randomly selected unowned item, and extra points carry over to the next run.

Prefecture codes (JIS X 0401)

JIS X 0401 assigns each prefecture a two-digit code. In this game, enter codes from 01 (Hokkaido) to 47 (Okinawa) to answer. Official lists are published by the Ministry of Internal Affairs and Communications (local government codes) (external site, opens in a new tab) and the Ministry of Land, Infrastructure, Transport and Tourism (prefecture codes) (external site, opens in a new tab) (in Japanese).

Saving records and data

Collections, points and results are stored in this browser. Use My Page’s save-data tools to back up or restore them. Only verified full 47-question runs enter the online ranking.

Credits and sources

Map data

Uses MLIT National Land Numerical Information, Administrative Areas 2026, combined by prefecture, projected and simplified for display.
MLIT National Land Numerical Information (Administrative Areas) (external site, opens in a new tab)

Some sound effects

Celebration sound effects use material from Sound Effect Lab (external site, opens in a new tab).

BGM

In-game music uses materials from MusMus (external site, opens in a new tab).