Artist.

Japanese name: 深谷 眞一 (Mitani Shin'ichi) (reading is a best guess)
The other name: カラクチ (Karakuchi)
Old names: ソマス (Somasu) or そまっこ (Somakko)
Site name: 不眠不休

See also

• Blog: http://somasu504.blog.fc2.com/
• Pixiv account (1): http://www.pixiv.net/member.php?id=109380
• Pixiv account (2): http://www.pixiv.net/member.php?id=12575077
• Nijie account: http://nijie.info/members.php?id=180922
• Niconico account: http://www.nicovideo.jp/user/494822
• Niconico community: http://com.nicovideo.jp/community/co3354604
• Niconico Seiga: http://seiga.nicovideo.jp/user/illust/494822?target=illust_all
• Twitter account: http://twitter.com/mitani27
• Deleted or unused accounts: [Google plus] / [Youtube] / [Ask.fm] / [Twitter (1)] / [Twitter (2)] / [Twitter (3)]