ysmmzr
Artist. Apparently he has "another pen-name and circle,":/artists/12078 but does not want the relation between two names to become public.
Nickname: ysmmzr
The other name: やしま (Yashima)
Circle name: MEGADEATH
See also
* Blog: http://ysmblg.blogspot.com/
* Tumblr gallery: http://ysmmzr.tumblr.com/
* Drawr account: http://drawr.net/kurashige
* Pixiv account: http://www.pixiv.net/member.php?id=399426
* Twitter account: http://twitter.com/ysmmzr
* Twitpic account: http://twitpic.com/photos/ysmmzr