{
  "dataset": "国土数値情報（行政区域データ）N03-2026",
  "date": "2026-01-01",
  "source": "国土交通省 / Ministry of Land, Infrastructure, Transport and Tourism, Japan",
  "url": "https://nlftp.mlit.go.jp/ksj/gml/datalist/KsjTmplt-N03-2026.html",
  "download": "https://nlftp.mlit.go.jp/ksj/gml/data/N03/N03-2026/N03-20260101_GML.zip",
  "sha256": "1f714fca019e22e6f84012dba420384fc7b49c6ad8bd0a867ab1cfb593a78477",
  "license": "CC BY 4.0",
  "licenseUrl": "https://creativecommons.org/licenses/by/4.0/",
  "attribution": "「国土数値情報（行政区域データ）」（国土交通省）を加工してMACHIZUMEが作成。",
  "romanization": {
    "source": "Japan Post KEN_ALL_ROME (2025-06)",
    "url": "https://www.post.japanpost.jp/service/search/zipcode/download/roman-zip.html",
    "terms": "https://www.post.japanpost.jp/service/search/zipcode/download/readme_ro.html",
    "changes": "Title case; district removed; designated-city ward suffix removed."
  },
  "municipalities": 1741,
  "prefectures": 47,
  "coverage": "792 cities, 743 towns, 183 villages and 23 Tokyo special wards. Designated-city wards merged. Excludes 6 northern-island villages and unassigned areas. Boundaries follow the source and do not express a position on territorial disputes.",
  "changes": [
    "Union by prefecture and municipality",
    "Largest land polygon only; islands and holes omitted",
    "Local equirectangular projection",
    "Topology-preserving simplification; normalized to game size, not real relative area"
  ],
  "accessed": "2026-10-23"
}