I'm still disturbed (and was really impressed) with the film Confessions, an entry for this year's Eiga Sai.
Based on Kanae Minato’s disturbing novel, I was gripped from the beginning 'til the end. I felt so lucky and grateful seeing it on a big screen since most of this kind has limited international release. With its poetic images and linear but extreme narrative, I consider this as one of the best asian films I've ever seen.
It is a psychological thriller that serves this main course: primal urge for vengeance over deep-seated hatred.