Kato (加藤) is a fictional character from The Green Hornet series. This character has also appeared with the Green Hornet in film, television, book and comic book versions. Kato was the Hornet’s assistant and has been played by a number of actors. In the television series he was portrayed by Bruce Lee. Jay Chou played Kato in the 2011 Green Hornet film.
It was due in part to Bruce Lee’s portrayal of this character, that the Green Hornet became more well known, and that the martial arts became more popular in the United States in the 1960s.