Artist, illustrator, mangaka.
Japanese name: 椋木 ななつ (reading is given as Mukunoki Nanatsu)
Old name: ななつ (Nanatsu)
Circle & site name: ななつや (Nanatsuya)
https://www.pixiv.net/users/60045
https://www.pixiv.net/stacc/365
https://twitter.com/nanatsu_
https://twitter.com/intent/user?user_id=445646002
https://pawoo.net/@365
https://pawoo.net/web/accounts/569111
https://sketch.pixiv.net/@365
http://kfia.hp.infoseek.co.jp
http://nanatsuya72.web.fc2.com
http://doujinshi.mugimugi.org/browse/author/54817
http://twitpic.com/photos/nanatsu_