I work with a guy who is into Takashi Miike's films. Those two films are the ones he always talks about. He says Audition is one of the most twisted flicks he has ever seen...apparently it includes a scene that he either will never watch again, or has never watched to this day because the content is something he thinks would be too much to watch (or something like that).
Anyway, this guy is way into all kinds of Asian horror stuff, and because of him the two films you mentioned are also in my Blockbuster queue (or at least Ichi is - I don't know if they have Audition or not).
Anyway, if you are looking for fucked up Asian horror films, it sounds like you are on the right track.
P.S. - I liked all three of the Oldboy trilogy of movies a lot - get those if you haven't seen them already. I also liked A Tale of Two Sisters, The Host, and of course the original Asian versions of the Americanized flicks like The Ring, The Grudge and Dark Water.
5/19 Ides of Gemini / Ancient VVisdom
5/23 Cobalt / Bolt Thrower / Pallbearer (MDF)