[Ningyou]

I've watched A LOT of Japanese (and other Asian) horror films, and I think what makes Japanese horror films so successful is that -- unlike most American horror films -- they rely a lot more on not actually showing much. There isn't a lot of blood (unless you watch movies like Ichi the Killer or Suicide Club), and you rarely see the act of dying. It's more of a psychological scare than a visual scare.