Japan provides 47 prefectures as admin-1 regions, sourced from Overture Maps.
| Scheme | Levels | Source |
|---|---|---|
| Administrative Divisions | Prefectures (47) | Overture Maps |
Japanese prefectures (都道府県).
| Level | Local Name | Count | Code Format | Example |
|---|---|---|---|---|
| Prefecture | 都道府県 | 47 | ISO 3166-2 (JP-13) | 東京都 (Tokyo) |
Japan has four types of prefectures: 都 (to — Tokyo Metropolis), 道 (dō — Hokkaido), 府 (fu — Osaka, Kyoto), and 県 (ken — the remaining 43 prefectures).
Accepted codes: ISO 3166-2 codes (JP-13), prefecture names in English ("Tokyo") or Japanese ("東京都", "東京"), romanized variants ("Tōkyō").
Preset: "Japan (Prefectures)"
| Scheme | Source | License | URL |
|---|---|---|---|
| Administrative Divisions | Overture Maps (2026-02-18.0) | CDLA Permissive 2.0 | overturemaps.org |