大忍者帝国 (Dai Ninja Teikoku)
A circle.
Formerly called Dai Taiwan Teikoku (大台湾帝国).
Pixiv - http://www.pixiv.net/member.php?id=5540840
Circle site - http://daininja.blog.shinobi.jp/
Old circle site (while called Dai Taiwan Teikoku) - http://daitaiwan.blog.fc2.com/