Artist.
The other name: Ryota-Umehara
Old names: Ryota-Sugihara or Chemical Dragon
https://www.pixiv.net/users/1475955
https://www.pixiv.net/stacc/sugihara2000
https://twitter.com/sugihara3103
https://twitter.com/intent/user?user_id=1011979270032257024
https://sugihara2000.booth.pm
https://www.deviantart.com/ryota-umehara
https://www.deviantart.com/sugihara-ryo
https://sugiharaart.newgrounds.com
https://seiga.nicovideo.jp/user/illust/25391066
https://www.nicovideo.jp/user/25391066
https://nijie.info/members.php?id=744494
https://pawoo.net/@sugihara2000
https://pawoo.net/web/accounts/307732
https://sugihara.fanbox.cc
https://www.pixiv.net/fanbox/creator/1475955
https://sketch.pixiv.net/@sugihara2000
https://sugihara2000.tumblr.com
https://sugihara2021.tumblr.com
https://www.instagram.com/sugihara3103/
https://www.dlsite.com/maniax/circle/profile/=/maker_id/RG39054.html
http://www.dmm.co.jp/dc/doujin/-/list/=/article=maker/id=75307
https://enty.jp/rgCouOXemsqb
https://www.pixiv.net/stacc/umearaya
https://twitter.com/sugihara2000
https://twitter.com/intent/user?user_id=860504145047937024
https://fantia.jp/fanclubs/2134
https://www.patreon.com/Sugihara
