Artist.
Japanese name: たまがわ (Tamagawa)
Site names: タマンサ川は広大 or ラムチョップ (lambchop)
https://www.pixiv.net/users/476666
https://www.pixiv.net/stacc/izm_tamagawa
https://twitter.com/tamagawan
https://twitter.com/intent/user?user_id=2930434994
https://sketch.pixiv.net/@izm_tamagawa
https://tamansagawa.tumblr.com
https://piapro.jp/tamagawan
http://twitpic.com/photos/tamagawan
http://yfrog.com/user/tamagawan/photos