Artist name: ひよひよ - Hiyohiyo
Pixiv account name: はいはいさん - Haihai-san
Home page: http://kashiwa-ya.jp/
Site name: かしわ屋 - Kashiwa-ya
Doujin Circle: 鉄拳ねこグルメ - Tekken Neko Gourmet (collaboration with だこば壱郎 (Dakoba 'Darkover' Ichirou). Hiyohiyo draws, Dakoba writes).
Circle web site: http://icg.sakura.ne.jp/
https://www.pixiv.net/users/1176390
https://www.pixiv.net/stacc/kashiwa-ya
https://twitter.com/kashiwa_ya
https://twitter.com/kashiwa_ya_r18
https://twitter.com/intent/user?user_id=97134130
https://twitter.com/intent/user?user_id=1368031711
https://fantia.jp/539fc672aa
https://fantia.jp/fanclubs/141945
https://hiyohiyo.fanbox.cc
https://www.pixiv.net/fanbox/creator/1176390
https://sketch.pixiv.net/@kashiwa-ya
https://skeb.jp/@kashiwa_ya
https://skeb.jp/@kashiwa_ya_r18
http://icg.sakura.ne.jp
https://portal.circle.ms/Circle/Index/10019759
http://twitpic.com/photos/kashiwa_ya