Map source: Geolonia japanese-prefectures (map-full.svg)
https://github.com/geolonia/japanese-prefectures
Based on Wikipedia 日本地図.svg. Licensed under GNU Free Documentation License (GFDL).
Changes: prefecture colors, dot patterns, accessible links. Okinawa and Amami inset relocated together to lower right. Original prefecture outlines retained.
Some outlying islands are omitted in the upstream source.
Original SVG included as map-source.svg. Full license: GFDL.txt.
Modified for 全国AI活用ガイド design preview on 2026-10-12.