Artist.
Japanese name: 炭酸男 (Tansan Otoko) (reading is a best guess)
The other name: 炭酸 (Tansan)
See also
- Pixiv account: http://www.pixiv.net/member.php?id=82604
- Drawr account: http://drawr.net/takahei73
- Niconico account: http://www.nicovideo.jp/user/577436
- Niconico commons: http://commons.nicovideo.jp/user/353242
- Blog (dead): http://pixiv.cc/takahei73/