Why are they banned in Japan? Well because in Japan, the special effects crew had made most of their films look like snuff films, even though no one was killed and it was all smoke in mirrors. I think the film Flower of Flesh and Blood was what got Ginuea Pig films banned in Japan...
Charlie Sheen also mistook one of their films as a real snuff film when it was just actors and special effects.
-Rakai'Thwei
