Yes im pretty sure they are. I got a japanese game that wont work on my ps2. I think the reason is the dvd/svcd part of the system. The origanal ps2's would play every region dvd's (pretty sure these were only the japanese ones) so they probably got sued and scared game makers into doing that. The origanal playstation played VCD's with an additional adapter. So it is possible that they could have regonalized the systems. If you dont know the answere go down to electronics botique and send him a american one, tho are probably 20 bucks or something.