TETSUYA (born October 3, 1969, at Osaka in Kansai, Japan), known professionally as tetsu, is the leader and bassist of the Japanese rock band L'Arc~en~Ciel. He also does backup vocals and has composed many of the band's songs, including 'Link', 'READY STEADY GO', 'finale', 'Driver's High', "Stay Away," and 'Pieces'. Since 2001, he had solo work under the name 'TETSU69' (Number 69 is his birth year). As of 26 November 2006 he changed his solo name to tetsu. On December 1, 2009, he changed his stage name to TETSUYA.