You know I get what you're saying Tiago, and I feel for you that the games you want don't currently seem to be coming to your system of choice, and you'd have been right in the past for blaming the head of MSG for that, but it really doesn't apply anymore if you ask me.
These current gen consoles are pretty much PCs as far as their architecture is concerned, and as a result porting a game from any one platform to another is ridiculously easy. With that being the case, it's simply a matter of Japanese developers choosing to say "fuck Xbox and potential fans on that system." It would cost them peanuts to port over their game, so little that they would make it back even if that version sold barely anything. MS shouldn't have to go out and give them all money just to make the logical business decision and expand their potential customer base.