Artist. Formerly tagged as tokunagasan.
Japanese name: とくなが (Tokunaga)
Circle name: 五角関数 (Gokaku Kansuu)
https://www.pixiv.net/users/5776272
https://www.pixiv.net/stacc/tokunagasan
https://twitter.com/rensyuushiroya
https://twitter.com/tokunagasan
https://twitter.com/intent/user?user_id=161722789
https://twitter.com/intent/user?user_id=831870060968845312
https://pawoo.net/@tokunagasan
https://pawoo.net/web/accounts/180088
https://sketch.pixiv.net/@tokunagasan
http://bottomsvotoms.blog.fc2.com
http://portal.circle.ms/Circle/Index/10252342
http://webcatalog.circle.ms/Perma/Circle/10252342
https://odaibako.net/u/rensyuushiroya
http://p.twipple.jp/user/tokunagasan
http://twitpic.com/photos/tokunagasan
