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))
