Remember, there are two parties involved here as well. There is a company who is willing to have its movie remade, to sell it's name & concept to another company, and the company who, avoiding the messy part of actually having to write its own script prefers to go with a 'proven' formula...
Both parties are complicit in the making of this film, both gain from its creation. I never thought that Chakushin Ari was that great of a film, one has to remember that a lot of the movies that Miike does, in fact themselves go straight to video.