Artist, illustrator.
Japanese name: 上原 ゆきひこ (Uehara Yukihiko) or うえはら (Uehara)
Circle & site name: simplessive
https://www.pixiv.net/users/5672
https://www.pixiv.net/stacc/0103
https://twitter.com/ueha_ra
https://twitter.com/intent/user?user_id=5654692
https://sketch.pixiv.net/@0103
https://www.tinami.com/creator/profile/25527
http://twitpic.com/photos/ueha_ra
http://yfrog.com/user/ueha_ra/photos