Joe Jitsu is a fictional character who has his own comic strip in The Beano. He's a boy who has a black belt in Karate. Some early strips also featured a man by the name of Johnny Woo, whose plans to get Joe into his dojo were never successful. Joe Jitsu also has a sister, called Jude. The strip is drawn by Wayne Thompson, who also draws Billy Whizz in the same comic.

Beano readers voted Joe Jitsu into the Beano in early 2004, along with Colin The Vet.

its also the name of a band www.jjitsu.com , they are from south-east texas and are awesome.