Provinces: Cities, Prefectural Entities, Counties and Districts
Major Cities & Prefectural Division: prefectural entities as well as all major cities with an urban population of 75,000 or more (on district or county level). 1990, 2000, 2010 census, (2017 estimate) – mainly 2018 boundaries
Counties & Districts: prefectural entities, county-level cities, city districts and counties. 2000, 2010 census, (2017 estimate) – mainly 2018 boundaries
Townships: city districts and counties as well as all urban subdistricts, towns and rural townships. 2010 census – 2010 boundaries