The upgrades are currently being offered in Japan only
A price hike announced in September of 2008 jacked prices of the 2009 car up to $76,840 and $79,090, rises of about $7,000 each. Today's jump checks in at almost exactly $5,000 each, raising prices to $81,790 and $84,040, respectively.
That makes the 2010 Nissan GT-R about 17% more expensive than the initial 2009 models - a major price rise considering the performance is nearly identical - a nominal rise of 5hp is included in the new sticker price, but it's likely just a stiffened claim on the car's existing output.
Nissan is still calling the GT-R a value proposition, but as it draws within shouting distance of the 638hp (476kW) Corvette ZR-1, one has to start asking if it's really worth it.