Artist, mangaka. The illustrator of Tsukiyoda Sadame no Sekai no Sukuikata.
Japanese name: 雨水 龍 (Usui Ryuu)
Old names: 龍水, 柳水 (Ryuusui) or 鳩 (Hato)
Site name: inkdam
https://www.pixiv.net/users/873046
https://www.pixiv.net/stacc/uequalink
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https://sketch.pixiv.net/@uequalink
https://inkdam.tumblr.com
http://www.amazon.co.jp/s/field-author=雨水龍&search-alias=books-jp
http://www.mangaupdates.com/authors.html?id=23644
https://www.pixiv.net/stacc/toughfnokado
https://www.pixiv.net/stacc/xeno8231
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https://www.tinami.com/creator/profile/26783
http://inkdam.blogspot.com
http://twitpic.com/photos/Ryusui_