@max 330 megafartz, only the first SOR has all 3 region on cart, not the second one, there is a specific cart for the USA region. Either way, you're right, better double check that switchless mod
@max 330 megafartz, try whatever version of streets of rage and see if you can get the japanese text in the intro by switching regions, if you can't then they're something wrong with the jpn/english jumpers
sounds like something is wrong with the mod, the message you got is the message I get when I play jpn region locked games without turning the japanese language switch on my old genesis