Artist. Formerly tagged as t.yokota.
Current main nickname: おるがん (Olgan, an abbreviation for "oldgamma", his old name)
The other nicknames: oldgamma, がんま (Gamma), 横田 高佳 or ヨコタタカヨシ (Yokota Takayoshi)
Circle name: KOM
Site name: Apochromat (アポクロマート)
https://twitter.com/oldgamma
https://twitter.com/intent/user?user_id=109448750
https://nijie.info/members.php?id=999
https://www.tinami.com/creator/profile/19172
http://apochromat.sakura.ne.jp
http://c10000360.circle.ms/oc/CircleProfile.aspx/
http://c10033302.circle.ms/oc/CircleProfile.aspx/
http://www.dlsite.com/maniax/circle/profile/=/maker_id/RG12552.html
http://b.dlsite.net/RG12552/
https://www.pixiv.net/users/45169
https://www.pixiv.net/stacc/oldgamma
http://twitpic.com/photos/oldgamma
