open-data-jp-prefectures

List of Japanese Prefectures

The list of prefectures is manually generated from these pages https://en.wikipedia.org/wiki/ISO_3166-2:JP http://www.statoids.com/ujp.html

The latest census data (2015) can be found here, it's not included in the data https://www.e-stat.go.jp/en/stat-search/files?page=1&toukei=00200521&tstat=000001080615&result_page=1&second=1

Usage

Just grab the file prefectures.json it has a list of objects with the structure

{
  "iso": "01",
  "prefecture_kanji": "北海道",
  "prefecture_kana": "ほっかいどう",
  "prefecture_romaji": "Hokkaido"
}

The prefecture_name in romaji will include one of the possible denomination Ken, To, Fu.

Related links

More open data repositories.

You can find a GeoJSON file of Japanese prefectures on open-data-jp-prefectures-geojson as well as a lower resolutions prefectures on dataofjapan.