This dataset is a Produced Work that made from eStat boundary polygon, 2015.
Original data is distributed under Government of Japan Standard Terms of Use.
CC0
You can check them in "Attribute_table.pdf" file. (written in Japanese)
- EPSG: 4612
- Encoding: Shift-JIS
- EPSG: 4326 (WGS84)
- Encoding: UTF-8
- See README.md in TopoJSON directory
Positionial accuracy is unknown.
You have to be careful at boundary on water area (e.g. sea, lake).
The boundary is NOT along coastline.
This statistics are collected at 2015.
You can check the boundary changes at 国土地理協会 page.