I think Hong Kong has a non region specific (0) DVD of Battle Royale.

well , i''ve just ordered 5 dvds and hope to scare myself and anyone who watches em with me silly next week

Double Vision
Audition
The Eye
Dark Water
Evil Dead Trap

I held off getting Battle Royale, cos Play.com are gona release a 5.1dts 2 Disc version of it soon, :)

If you liked Audition, try Vistor Q or Ishii the Killer. Their both Japanese movies and made by the same guy.