Japanese artist.
Pixiv nickname: 有坂K
https://www.pixiv.net/users/13936572
https://www.pixiv.net/stacc/arisakak
https://twitter.com/valshun1225
https://twitter.com/intent/user?user_id=320294723
https://fantia.jp/fanclubs/5193
https://pawoo.net/@Arisaka_K
https://pawoo.net/web/accounts/58489
https://sketch.pixiv.net/@arisakak
https://skeb.jp/@valshun1225
http://odaibako.net/u/valshun1225
https://twitter.com/ari_ssuke
https://twitter.com/arissak_K
