Niconico artist. He is famous for amazing Idolmaster handdrawn videos.
Everybody knows he is actually another account of Takemura Sesshuu. However, his fans kindly overlook the open secret.

Niconico names: 下井草P (Shimoigusa-P) or "shimoigusa"
Pixiv nickname: 西武新宿下井草液 (Seibu Shinjuku Shimoigusa Eki)

See also

• Pixiv account: http://www.pixiv.net/member.php?id=1234832
• Niconico account: http://www.nicovideo.jp/user/352457
• Niconico MyList: http://www.nicovideo.jp/mylist/15592281
• Nicopedia article: http://dic.nicovideo.jp/id/4145612
• Twitter account (stopped): http://twitter.com/shimoigusap
• Twitpic account (stopped): http://twitpic.com/photos/shimoigusap