Without much fanfare (okay – zero fanfare), Nissan has rolled a tweaked version of its home-market GT-R onto the show floor here at the Tokyo Motor Show.

While you're not likely to notice any exterior differences, JDM buyers should appreciate that Nissan has fettled the suspension, fitted higher-flow cats to the exhaust system for improved low- and mid-range response (as if this were a problem before), and they've also added a next-generation hard-drive based navi system that includes iPod connectivity.

On the suspension end of things, the rear suspension radius rod bushings have come in for a stiffening, and the front shocks and springs have been tweaked for increased "accuracy" (no, we're not entirely sure what that means either).



Perhaps the only modification that will be visible to passers-by is the inclusion of rear diffuser cooling ducts across the range – previously these were only fitted to the SpecV model.

Speaking of SpecV, the higher-performance model also gets new rear shock settings and standard Dunlop tires – Bridgestone loyalists, fear not - those shoes are also still available by request.

The updated GT-R hits JDM dealers on December 7, but Godzilla-crazed performance fans in the rest of the world will have to wait until spring to get one of their very own.