Programmer, artist and a GIMP user.
For some reason he always writes this joke phrase on his profile pages: ”おちんちーん”
Japanese name: やまきゅう (Yamakyuu) (Not to be confused with Yamaque)
Mainly-used nickname/user ID: ycums
https://www.pixiv.net/users/3300
https://www.pixiv.net/stacc/ycums
https://twitter.com/ycums
https://twitter.com/intent/user?user_id=4575191
https://nijie.info/members.php?id=435591
https://nijie.info/members.php?id=590391
https://pawoo.net/@ycums
https://pawoo.net/web/accounts/19553
https://pawoo.net/web/accounts/19979
https://ycums.fanbox.cc
https://www.pixiv.net/fanbox/creator/3300
https://sketch.pixiv.net/@ycums
http://www.tinami.com/profile/94497
https://www.tinami.com/creator/profile/15722
https://ycums.tumblr.com
https://privatter.net/u/ycums
https://www.stickam.jp/profile/ycums
http://www.youtube.com/profile?user=youcharmanums
http://www.flickr.com/photos/13238523@N06/
http://www.flickr.com/photos/webdiver/
http://github.com/ycums
http://plus.google.com/106275272604672728660
http://plus.google.com/106275272604672728660/posts
http://plus.google.com/116261201026014829131
http://plus.google.com/u/0/106275272604672728660/posts
http://profile.hatena.ne.jp/ycums/
https://mstdn.jp/@ycums
https://www.pixiv.net/stacc/youcharmanums
http://ggggimp.blog.fc2.com
http://youcharmanums.blog.fc2.com
http://theinterviews.jp/ycums
http://p.twipple.jp/user/ycums
http://twitpic.com/photos/ycums
http://yfrog.com/user/ycums/photos
