Artist, illustrator.

Pen-name: 此処 シグマ (Koko Shiguma or Koko Sigma)
NSFW pen-name: 何処 テトラ (Doko Tetra or Doko Tetora) or テトラ (Tetora)
Circle name: ココロメトロ
Site name: えとせトラ

See also

• Koko Shiguma's accounts:
• Blog: http://demo324.blog81.fc2.com/
• Tumblr portfolio: http://kokosiguma.tumblr.com/
• Pixiv account: http://www.pixiv.net/member.php?id=120048
• Tinami account: http://www.tinami.com/creator/profile/14438
• Pixiv sketch account: http://sketch.pixiv.net/@demo3248
• Drawr account: http://drawr.net/demo3248
• Live streaming channels: [CaveTube] / [Twitch.TV] / [USTREAM] / [stickam (unconfirmed)]
• Privatter account: http://privatter.net/u/kokosiguma
• Twitter account: http://twitter.com/kokosiguma
• Twitpic account (server stopped): http://twitpic.com/photos/kokosiguma
• Mixi account (unconfirmed): http://mixi.jp/show_friend.pl?id=59264107
• Circle.ms: http://portal.circle.ms/Circle/Index/10220616
• Comike Web Catalog: http://webcatalog.circle.ms/Perma/Circle/10220616
• Skillots information page: http://www.skillots.com/search/profiles/4051
• Amazon.co.jp: http://www.amazon.co.jp/s/search-alias=books&field-author=此処シグマ
• Yfrog account (dead): http://yfrog.com/user/kokosiguma/photos
• Doko Tetora's accounts:
• Pixiv account: http://www.pixiv.net/member.php?id=6076910
• Nijie account: http://nijie.info/members.php?id=38140
• Twitter account: http://twitter.com/doko_tetora