# Prefecture Drop — Clear neighbors, learn Japan

> Clear neighbors, learn Japan (iPhone/iPad app by Shoya Kurokawa.)

- Source: https://appshunter.io/ios/app/prefecture-drop/id6816910475 (this page in markdown: same URL + `.md`)
- Developer: [Shoya Kurokawa](https://appshunter.io/developer/6789374728)
- Category: Games, Education, Casual, Puzzle
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 15.0 · 26 MB
- Languages: American English, Japanese
- Released: 2026-10-30
- Data updated: 2026-11-10

## What is Prefecture Drop?

A falling-block puzzle made of Japan's 47 prefectures: pieces clear when real neighbors touch.

The map of Japan has come apart. The land-pulling god lets the prefectures down into a box one by one. When two prefectures that really border each other touch, they join up and go back home (they disappear). Don't let the box overflow.

HOW TO PLAY
- Drag to aim, lift your finger to drop
- Tap the left or right side to turn the piece
- Neighbors that touch clear and score
- When a piece that falls after a clear touches another neighbor, that's a chain: a 2-chain scores double, a 3-chain triple

FEATURES
- Every piece is based on the real shape of a prefecture (simplified for play)
- Learn which prefectures border each other as you play
- A map of Japan built from the pieces: check any prefecture and its neighbors
- A short tutorial for your first game
- Hokkaido and Aomori, and Okinawa and Kagoshima, also count as neighbors

ADS
An ad may appear at game over. The one-time "Remove Ads" purchase turns them off.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Remove Ads | $2.99 | one-time |


## Is Prefecture Drop safe?

Not enough ratings yet to assess Prefecture Drop.

## Is Prefecture Drop legit?

Prefecture Drop appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for Prefecture Drop is 65 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 2 releases)

### 1.0.1 — 2026-11-04

Minor fixes.

### 1.0 — 2026-10-30

No release notes.

## Apps similar to Prefecture Drop

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Prefecture Survival](https://appshunter.io/ios/app/prefecture-survival/id6814359738) | — | Free | Games |
| [Shimaenaga Drop: Merge Game](https://appshunter.io/ios/app/shimaenaga-drop-merge-game/id6758879506) | — | Free | Games |
| [臓器ゲーム-MergePuzzle-](https://appshunter.io/ios/app/mergepuzzle/id6504057451) | — | Free | Games |
| [Singing Birds: Duet Birds](https://appshunter.io/ios/app/singing-birds-duet-birds/id6740286959) | — | Free | Games |
| [Infinity Cats](https://appshunter.io/ios/app/infinity-cats/id6633421848) | — | Free | Games |
| [Power Them](https://appshunter.io/ios/app/power-them/id1584950601) | 3.0 (4) | Free | Games |

## More apps by Shoya Kurokawa

- [まどりパズル - 間取り図で解く論理パズル](https://appshunter.io/ios/app/id6801533032)
- [SUBWORTH](https://appshunter.io/ios/app/subworth/id6808133924)
- [SHOTDUE - スクショの期限をリマインド](https://appshunter.io/ios/app/shotdue/id6808508294)
- [オクリモノ台帳 - 返礼の期限管理](https://appshunter.io/ios/app/id6809839702)
- [うちマニュアル - 家事のやり方を動画で残す](https://appshunter.io/ios/app/id6810102533)

All apps by Shoya Kurokawa: https://appshunter.io/developer/6789374728

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-11-10.*