Japanese singer-songwriter and multi-instrumentalist, who debuted in May 2004 in America with his album Night Piece. He creates every aspect of his music, including the lyrics, music, arrangements, recording and mixing. He is known for the variety of instruments he uses in his music, using over 100 different traditional and non-traditional instruments in his recordings. Tokumaru is also a member of the Japanese rock band Gellers. Tokumaru's 2010 album Port Entropy was his most commercially successful album in Japan, breaking into the top 40.