watched this movie today. the trailer here is pretty much exactly like the Japanese one, except for credits and the dubbing. it's pretty enjoyable overall, though it's quite violent, and not in the cartoon style violence that the Chinese martial arts movies tended to be.
when the narrator says "display of the most savage karate" he's not kidding. pretty much deserved the R rating at the time, though now it's a little more tame. which I don't mind a bit.