I can’t read all the names on the posters, but Asami and Demo Tanaka are back, and it also stars Asana Mamori (Gravure Idol) and many more names that are too blurry to read and too close to nakedness to Google at work.
The synopsis from the Fantastic Fest website:
We are going to flush you! The most crap-tastic zombie movie ever to emerge from the sewers of low-budget filmmaking is finally upon us, and it’s from the perverted mind of cinematic madman and legendary ass-fetishist Noboru Iguchi, creator of THE MACHINE GIRL, ROBO-GEISHA and KARATE-ROBO ZABORGAR! Given free reign by a generous, independent producer to plumb the depths of his toilet-obsessed imagination, Iguchi has created a splatter comedy guaranteed to warm the bowels of those with the stomach for it. Wracked with guilt over the suicide of her sister Ai, who was tormented by high school bullies, pretty young karate student Megu accompanies a group of older friends on a camping trip into the woods: smart girl Aya, her druggie boyfriend Také, big-boobed model Maki, and nerdy Naoi. Things start to go badly when Maki finds a parasitical worm inside a fish they catch – and wolfs it down alive, in the hope that it’ll help keep her skinny! Soon after, and not so unexpectedly in situations like this, zombies show up and begin to complicate things further. After they’re attached by a crowd of poop-covered undead who emerge from an outhouse toilet, the group seeks refuge at the home of strange Dr. Tanaka and his daughter Sachi. But unbeknownst to them, Tanaka has been conducting experiments on the parasites—and the zombies!—and has another fate in mind for the five strangers from the city. What’s the connection between the parasites and the zombies? And can Megu’s karate alone help them escape, or will she have to rely on the liberating power of farts to save the day? Featuring special effects by FF 2009-2010 guest Yoshihiro Nishimura, and some truly jaw-dropping contributions from Iguchi’s genius subconscious (parasite anus-zombies?!?), ZOMBIE ASS is a heaping plate of bad taste that may go down rough but is guaranteed to come out smooth and regular.