Japan's 47 prefectures, 1,741 municipalities (792 cities, 743 towns, 183 villages, 23 Tokyo special wards), and 28 national government entities including 13 ministries, 11 agencies, the Diet (legislature), Supreme Court, and constitutional bodies.
| Source | URL | Data Used |
|---|---|---|
| Statistics Bureau of Japan | stat.go.jp | Population estimates by prefecture (October 2024) |
| JapanGov (Prime Minister's Office) | japan.go.jp | Government directory: ministries, agencies, Diet, courts |
| e-Stat (Portal Site of Official Statistics) | e-stat.go.jp | Municipal-level statistics and codes |
| localgovjp (Local Government Japan) | localgovjp.org | 1,741 municipality names, JIS codes, and classifications |
| geoBoundaries | geoboundaries.org | 47 prefecture boundary polygons (GeoJSON) |
| GADM (v4.1) | gadm.org | Administrative boundaries (prefectures and municipalities) |
| Wikipedia - Prefectures of Japan | wikipedia.org | Administrative divisions (verification) |