This file is derivated from File:Japan map.png. The source and authors of the original map are as follow:

• Original file: Koba-chan and depending on time of crop perhaps also (see original file): Kon, Rai koku, 赤鉛筆, JYOQ2, 月夜野ほたる, 139, 国鉄115系湘南色, BigBang19, そらみみ and たくやばすけくん
• Original data: National Institute of Geosciences, Ministry of Land, Infrastructure, Transport and Tourism (国土交通省国土地理院（旧建設省 国土地理院))

The original file is licensed {{GFDL}} and {{Cc-by-sa-3.0}}. The changes made based on the original file are as follow: Minor changes are {{PD-ineligible}} meaning the file is GFDL and Cc-by-sa-3.0. Bigger changes made before August 1, 2009 or after September 30, 2020 are licensed GFDL and Cc-by-sa-3.0 like the original file. Bigger changes made by the uploader between August 1, 2009 and September 30, 2020 (inclusive) are licensed GFDL only. In some cases the uploader added further licenses for the changes and in that case the licenses are specified below.
This tag does not indicate the copyright status of the attached work. A normal copyright tag is still required. See Commons:Licensing.