Kotaku just put up a nice review of Yakuza: Like A Dragon (The Yakuza movie.) 

I quite enjoyed Yakuza: Like a Dragon. It was an excellent black comedy. And while it obviously strayed more than a little from the source material, I think it fit the feeling of the game more than a super-serious adaptation would have. If you like black comedy or the Yakuza game series, you should definitely give this movie a try.

– Kotaku

Give the whole thing a read and see if you agree! Then grab a copy of the movie (Available on Amazon, Netflix or PSN)