Monster Hunter Freedom 3, or Monster Hunter Portable 3rd as it's known in the west, looks set to become the best-selling game in Japan for the 2010 financial year.
The monster PSP game is already the fastest-selling PSP game in history. Capcom's shipped four million copies of the game in Japan alone, bringing total sales of the series up to 17 million.
Last month Freedom 3 became Capcom's fastest-selling game of all time, beating the likes of Street Fighter, Mega Man and Resident Evil.
The game's only been on sale just over a month.
The Monster Hunter series' phenomenal success is very much a local phenomenon. It is still relatively unknown outside of Japan despite Capcom's effort to boost its widespread appeal.
Monster Hunter Portable 3rd is yet to be announced for Europe and the US.