Originally Posted by Ricardo C

I highly recommend the Japanese ones. They're lower budget films, so they have a less glossy look than their American counterparts, as well as more practical visual effects instead of CGI ones, but the end result is a more organic kind of horror movie, with Kayako coming across scarier because she's "there", with no digital enhancements to make her movements freakier. There's no mental "safety net" that reminds you "yeah, this is just a visual effect, it's not real". Think of the difference between Samara coming out of the TV in The Ring, complete with digital effects, and Sadako's arrival in Ringu. If you prefer the less glitzy original, you'll love the Ju-On series.

And the soundtrack... You'll never listen to piano music the same way again