The PlayStation Portable has sold over 10 million units in Japan alone, reports Kotaku. Looking over the list of top-selling games, it's not hard to see what's been driving the charge. RPGs dominate the list at all five spots, and the Monster Hunter series occupies three of them. Altogether, the sales of Monster Hunter games reach nearly 5 million units, half the number of systems sold in the country. Sony of Japan needs to send Capcom a nice gift basket for giving them this many sales.
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