Artist, illustrator.

Pen-name: イセ川 ヤスタカ (Isekawa Yasutaka)
Handle: ななしな (Nanashina)
The other name: 七c七 (Nanashina)
Circle & site name: N7747
Old site name: NN.works Ver.7747(仮)
Joint circle name: 抹茶七品目 (Maccha Nanahinmoku) (the other members: [[Fuzuki Maccha (Mattya)]] and "Fumi (Shippou Kaede)":[http://www.pixiv.net/member.php?id=888221])
isegawa yasutaka