The series was produced by Sony Pictures Entertainment Visual Works (now Aniplex) and animated by Radix (later Radix Ace) and Studio OX. It was broadcast on Kids Station from October 16, 2000, to January 8, 2001. The anime followed more of the manga, with a darker nature of Jiro's reason to exist. An English dubbed version of the anime and OVA aired on Cartoon Network's Adult Swim programming block in the United States.