Not all Monster Hunter games make it outside of Japan. The Wii port of Monster Hunter G, for example, was passed over, as was Monster Hunter Frontier, the PC MMO upon which the upcoming Xbox 360 game is based. That's why it's noteworthy that Capcom's Keiji Inafune told Famitsu (according to Andriasang's translation) that "I feel Monster Hunter can definitely succeed overseas. There's a high possibility that MHF will kickstart that." For such a kickstart to take place, the game would have to be released overseas.
Unless, of course, it's already kickstarted by Monster Hunter Tri, coming out in North America and Europe this April, right?