Tochigi, Japan - Speedsters in Japan had better watch their backs; Nissan has donated a GT-R to the Tochigi Prefectural police department.

The 315km/h sports car – affectionately nicknamed Godzilla by its followers - is built at the Kaminokawa assembly plant in Tochigi, and Nissan donated the two-door coupé to celebrate the factory turning 50 years old.

Nissan has over the years built several fast police cars, including GT-Rs, but this is the first time it’s given one to the police department in the area where the car’s built. The ceremony included the exchange of a comically large key, amusing since the GT-R no longer uses a physical key to unlock or start the car.

Ironically, Nissan says that in addition to rounding up roadhogs, the police Godzilla will also be used in promotions to get kids interested in cars.

The GT-R patrol car has been modded-out with a light bar on the roof, flashers in the bumper, and black-and-white police graphics along with sinister-looking black 20" mags – all sure to strike fear into the hearts of road hogs who spot it approaching in their rear view mirrors.

And once they do spot this 406kW charger in those mirrors, it’s game over. Because this GT-R presumably isn’t speed-restricted to 180km/h like most civilian cars in Japan and, together with its ability to cover 0-100km/h in around three seconds, all 315km/h of 3.8-litre twin-turbo V6 thrust can be unleashed in the pursuit of misbehaving motorists.

The long arm of the law just got a lot speedier!