I love Kurosawa, but I assume you have seen most of his big films. One of my favourites of his that is not mentioned as often is The Bad Sleep Well http://www.imdb.com/title/tt0054460/ one of the greatest opening scenes I have ever seen.
The only Kurosawa film I've seen is Seven Samurai. I loved it. I guess I should check out other films by Kurosawa...
Infernal Affairs - The Departed was crap if you knew anything about IA...
big trouble in little china
HahA!
anyway, it's hard to find a decent asian movie these days that isn't ridiculous gun blasting, flipping, BS craptacular stunt work, emo characters with childish haircuts and such. At least, this is mostly what we get over here in wider release.
all that being said, it's tough to top Roshomon, Seven Samurai, etc.