Beautiful yet deadly female warrior Asami (Asami) wages war against the Shoryu yakuza, who have been using extreme measures to force the townsfolk of Sagawa from their homes in order to make way for a casino.
I've yet to see the first Yakuza-Busting Girls movie, so I cannot comment on how this sequel fares in comparison, but I do think that the other reviewers here on IMDb (all two of them) have been a little harsh in their assessment: fans of AV star Asami will no doubt be disappointed by her lack of nudity, and the film does admittedly feel rather uneventful at times, writer/director Shin'ichi Okuda devoting a little too much of the running time introducing and developing his characters, but I reckon that the gnarly splatter and fun fight action still qualify this as an entertaining watch.
A gruesome pre-credits sequence, in which the yakuza chainsaw a man's arm off and shove the whirring blade between a woman's legs, sets the mean-spirited tone for the violence, with subsequent nasty scenes including some messy shotgun damage to a mother's hand and foot, her baby being skewered on a samurai sword, and a juicy head explosion. There's also some reasonably well choreographed martial arts (with a nifty training montage for good measure), neat references to both classic Western and Japanese cinema (Asami mimicking Meiko Kaji's Female Prisoner #701 and Okuda employing a Spaghetti Western atmosphere throughout), and a really cool villain in the form of ruthless hired killer Akira (Hitomi Miwa).
Duel in Hell might not be the finest example of Japanese excess available, but it is enjoyable enough, and if anything, it's REALLY made me want to check out the first film.
