Capcom has shipped anothermillion copies of Monster Hunter Portable 3rd, bringing the total to four million since the game's December 1 release in Japan. It's not only the PSP's fastest-selling title ever, but looks to be Capcom's top-selling title of the 2010 fiscal year (ending Match 31, 2011). The publisher previously announced that the game had become the "fastest-selling game in Capcom's history," and according to the company, Monster Hunter series sales have now reached 17 million units sold.
Capcom has also noted that Monster Hunter Portable 3rd has reached the four million–shipped milestone in one month, a feat that took Monster Hunter Freedom Unite two years to achieve. Portable 3rd has yet to be announced for release outside of Japan.