The Japanese are a nation of devoted cinephiles, and it sees, to be horror that excites the country's film fans the most. The apocryphal tale of Cannibal Holocaust out performing E.T. at the Japanese box office likely has some truth in it.
And of course, there is a similar tale of the ridiculous death hag fodder - Faces of Death - out-grossing Star Wars in Japanese cinemas. How fabulous would it be if that is true?