The Mitsubishi HSR-II (Highly Sophisticated-transport Research) was an experimental concept vehicle developed in 1989. The first HSR was announced at the 27th Tokyo Auto Show in 1987, followed by the second version the next year at the 28th Tokyo Auto Show. Contrary to its modern looks, the HSR-II was positioned more as an evolution of the Diamante or GTO, a fact made clear by the introduction of the "Active Footwork System" in the HSR-I.