This is somewhat upsetting news. According to "lol, forums", a member of the Atlus staff who posts on the official Atlus Forums, Persona 4: Arena for the PS3 will be region locked. What does this mean exactly? If you buy a Japanese copy of the game and don't have a Japanese PS3, you're not going to be able to run the disc. Vice versa as well; an American version of the game isn't going to run on Japanese PS3's. (Atlus, Gaming, Persona 4: Arena)