[quote name='Friedle']Things have region encoding and say things like "For Sale Only In Country XXX" for a reason.
[quote name='_heretic']What reason is that, professor?[/QUOTE][/QUOTE]
Licensing, mainly. I don't think Doshin the Giant isn't a good example of why, but any game with music or other 'protected content' has to be licensed by area or the owning companies have a fit.
That's the official reason, anyway. They also want to discourage importing because they want you to buy it in your home area. Of course in this case, that's not possible.