Sgt. Kabukiman N.Y.P.D. (1990)

If you like Troma's kind of silly, off beat, absurd humor then I'm quite sure you'll really enjoy a whole lot of scenes in this flick as well. There are lots of cartoonish, hilarious characters all of which have been acted out with confidence and conviction.
The story... well there's this American cop in NY who finds out he can get supernatural powers by changing into the Kabukiman, a kind of Japanese Samurai dude with lots of makeup. Our hero uses his new found powers to beat the crap out of some local small time crooks in various entertaining ways, but it turns out he really owns his powers to the fact that he was chosen to fight the Evil One, who is about to take over the world. He is reluctant to accept this responsibility at first, but a Japanese chick kicks some sense into him and then goes on to teach him how to use his new found skills properly.