Black Cat (ブラックキャット, Burakku Kyatto) is a Japanese manga series written and illustrated by Kentaro Yabuki. It was originally serialized in Japan in Shueisha's Weekly Shōnen Jump. It was later collected in twenty tankōbon volumes from January 11, 2001 to October 9, 2004. The series was adapted into a twenty-four episode anime series by Gonzo studio. It debuted in Japan on the anime satellite television network Animax and the terrestrial television Tokyo Broadcasting System network on October 6, 2005 with its final episode airing on March 30, 2006.
Viz Media licensed the manga series for English-language publication in North America and as of May 2009, have released all 20 volumes of the series. Funimation Entertainment licensed the anime series for North American broadcast where it was broadcast on the Funimation Channel. The series later were released on six DVD compilations, as well as a Complete Series boxed set.
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 dubbed sweeper.