Konami announced Metal Gear Rising: Revengeance not Xbox 360 version will be released, although this cut affects only the Japan. You have not specified the reason of this choice, although probably is given by the fact that the Japanese territory has always been very fertile for the Microsoft console market, and it was feared that sales would not covered production costs, while the PS3 version has a better chance of success. In any case we Europeans we need not fear anything, since it was confirmed that West will be distributed both versions of the game.