Do As Infinity is a Japanese pop rock band. Currently consisting of 伴都美子 (Tomiko Van, vocalist) and 大渡亮 (Ryo Owatari, guitarist), several of their songs have been used as themes for Japanese television shows, movies, video games, and anime, which gained them a great amount of popularity both in Japan and worldwide. They were formed in Tokyo in 1999, and debuted as a trio the same year with 長尾大 (Dai Nagao) as composer and leader. In 2003 their greatest hits album Do The Best achieved million sales in Japan.