Jiu Jitsu, Anyone?

In the more than two decades that I've been watching martial arts movies, I have yet to see one that showcases the Japanese martial art of Jiu Jitsu. Sure, many fighters in the UFC have probably attended San Diego Jiu Jitsu classes and are now dominating the league, but I still have to hear of a movie about Jiu Jitsu, which includes ground fighting and grappling as fighting techniques.

A movie about this highly practical and more realistic martial art would be great.