Kanto fits better with Japan, seeing as it's named after a region there and looks a fair amount like that region. I agree with you on Johto, Hoenn, and Unova; Sinnoh I'm not sure about.
Orre, I think, seems like... the United Arab Emirates, maybe? A post-futuristic version of it? Actually, it's kinda Las Vegas-ish, now that I think about it.