Ai Otsuka
is a Japanese guitarist who was born April 4, 1971 in Kanagawa Prefecture, Japan. He was formerly a member of the amateur band "pee-ka-boo", but he is mainly known for his work in the band Do As Infinity alongside Tomiko Van and Dai Nagao. After the disbanding of Do As Infinity, he started working with his new band, Missile Innovation. Ryo has also collaborated with some Avex label artists like Ai Otsuka and Ayumi Hamasaki.