I do not know if it's the fact that the movie takes place in Japan, and that Japanese filmmakers have already frightened the whole planet with The Ring franchise or The Grudge franchise, or if it's the fact that this country seem completely haunted, but even some critics will say that this film is a rip-off of Paranormal Activity, this "Effect" provokes much more shivers than the American version. I really miss Japanese horror films, I want to see more, and I want to see more from his two directors who while staying in a certain tradition, and while using a realistic approach, manage here to renew Japanase ghost's movie (here, no oily hair, just goose-flesh).