Black Cat is a Japanese manga series written and illustrated by Kentaro Yabuki. It was originally serialized in Shueisha's Weekly Shōnen Jump from 2000 to 2004, with the chapters collected into twenty tankōbon volumes. The story centers on a man named Train Heartnet who withdrew from an elite group of assassins called the Chronos Numbers to become a bounty hunter, or Sweeper. The series was adapted into a twenty-four episode anime series by Gonzo studio, which aired on the satellite television network Animax and the terrestrial Tokyo Broadcasting System channel from 2005 to 2006. The manga was licensed for English-language publication in North America by Viz Media and by Madman Entertainment in Australasia. Funimation Entertainment licensed the anime for an English dub and North American broadcast on their own Funimation Channel, with Madman releasing it in Australasia and MVM Films in the United Kingdom.