Where was K-20: Legend of the Mask filmed?

2008 film by Shimako Satō

K-20: Legend of the Mask (2008) was filmed in Fukuoka, Kitakyūshū, Kyushu University, Higashi-ku, Moji-ku, Former Moji Mitsui Club and 2 more places, 8 places named in its Japanese Wikipedia’s 主なロケ地 section, in Japan. Wikidata records no filming location for it at all, so the article is the only recorded source. Each place says where its claim comes from.

See them on the map → Wikipedia Source data