Ive just recently acquired this film and Ive yet to watch it, so expect a review on this soon. The film is not frightening per se as the approach is from the ghosts point of view but it is disturbing because we witness how spirits who were killed prior end up having no memory of what was done to them and who did. After remarking on how JMH314 mentioned most J-Horror films, here I am, starting the list with one from Japan itself.
Whispering Corridors: Voice (South Korea). But nonetheless, its a kickstarter point because of the featured character Im going to mention.