IMO the Japanese make some of the best horror films, with great subtlety and suggestion. Some of my favourites are:
https://images-na.ssl-images-amazon....AC_SL1282_.jpg
https://images-na.ssl-images-amazon...._AC_SX342_.jpg
and more recent, and very disturbing, though I'm not sure you could classify it as 'horror'
https://images-na.ssl-images-amazon...._AC_SY445_.jpg