jpn_admins()
Simple features for administration office points
jpn_cities()
Simple features for city area polygons
jpn_pref()
Simple features for prefecture area polygon
mesh_district()
Export district's mesh polygon
code_reform()
Reform input jis code as 2 or 5 character length.
code_validate()
Administration code validation
find_city()
Detect city by coordinates
find_pref()
Detect prefecture by coordinates
find_prefs()
Detect prefectures by coordinates
jpnprefs
Prefectural informations in Japan
prefecture_mesh
Prefecture's meshcode