hitotoshi
Artist.
Japanese name: 人とし (Hitotoshi or Hitoto4)
See also
* Pixiv account: http://www.pixiv.net/member.php?id=4003999
* Twitter account: http://twitter.com/hitoto4
* Twitpic account: http://twitpic.com/photos/hitoto4
* Twipple photo images: http://p.twipple.jp/user/hitoto4