Artist, vipper. He has at least four other pixiv accounts.

Main nicknames: 真面目系クズ (Majime-kei Kuzu) or 真面目クズ (Majime Kuzu) (the name probably came from a certain 2ch slang)
The other names: 真面目系クズ餅, 真面目系くずもち (Majime-Kei Kuzumochi), くず餅 (Kuzumochi), ほたてまつり (Hotate Matsuri) or ほたて (Hotate)

See also

• Pixiv account: http://www.pixiv.net/member.php?id=5528759
• Nijie account: http://nijie.info/members.php?id=169352
• Niconico account: http://www.nicovideo.jp/user/6469613
• Niconico Seiga: http://seiga.nicovideo.jp/user/illust/6469613?target=illust_all
• Twitter account: http://twitter.com/majimekuzu2
• Twitpic account (stopped): http://twitpic.com/photos/majimekuzu2
• Old twitter account (deleted): http://twitter.com/majimekuzu_v