 The six episode series was released in Japan from April 2000 to March 2001 . A manga and novel were also created at the time . It aired in America on Cartoon Network 's Adult Swim block in 2003 several times . It aired once again on the channel 's Toonami block from October 26 , 2013 to January 25 , 2014 . The series is also available via Hulu , iTunes , and on Funimation 's website . 
