Joyû-rei (1996)
 

http://www.imdb.com/title/tt0229499/

Has anyone seen this? I came across it while looking through Hideo Nakata's filmography on IMDb and it looks quite intriguing and very creepy. It's Hideo Nakata's first horror film and is currently being remade by Fruit Chan. You can watch it here but I don't know if the link is legal.