Artist.
Nickname: 鋼鉄さん (Koutetsu-san, the artist uses this spelling: "Koutetusan")
The other names: 鋼鉄 (Koutetsu or Koutetu), "koutetu_bouya" or kuribouya
Circle name: 鋼鉄工房 (Iron Factory)
https://www.pixiv.net/users/4870152
https://www.pixiv.net/stacc/koutetu_bouya
https://twitter.com/koutetu_bouya_
https://twitter.com/intent/user?user_id=618311166
https://seiga.nicovideo.jp/user/illust/25808317
http://com.nicovideo.jp/community/co2586043
https://www.nicovideo.jp/user/25808317
https://sketch.pixiv.net/@koutetu_bouya
https://www.tinami.com/creator/profile/50255
https://ask.fm/koutetu_bouya_
http://soundcloud.com/koutetusan
http://twitpic.com/photos/koutetu_bouya_
