I've seen the bolded (Audition being my favorite), and parts of Visitor Q and The Happiness of the Katakuris. I haven't watched his movies in about five years, as I got pretty bored with Asian horror films after seeing too many of them within a short period of time. Especially as they tend to repeat the same formula.
Ringu was the first Asian film I saw (I imagine I'm not alone with that), and it's still my favorite of them all. I just adored the atmosphere, the soundtrack, and the finale with Sadako coming from the TV; the unnatural way she moved, facial figures always obscured by the long black hair, the brief grotesque glimpse of her
eye and torn
nails. Too bad they failed miserably to re-act that all in the remake. Showing too much is never a good thing in a horror movie.