Sonny Chiba was Japan's answer to Bruce Lee and in my personal opinion I think he is more badass. I mean, he does rip a dude's dick clean off and he rips out somebody's throat. It doesn't get more badass than that.
What it lacks in fight choreography it makes up for in good, sleazy fun with Sonny Chiba punching people in the stomach so hard that blood bursts out of their eyes. The ending is crummy even by martial arts movie standards, though.