Mazda has unveiled two concepts at the Tokyo motor show, including a four-door plug-in hybrid coupe with a rotary engine.

In what appears to be close to production-ready guise, Mazda's Vision X-Coupe – with the 'X' to be pronounced as 'cross', the company points out – may very well be the conceptual preview of the long-awaited RX-9, combining the company's iconic rotary engine with the latest plug-in hybrid technology.

While details remain thin, Mazda says the Vision X-Coupe mates a turbocharged twin-rotor engine with an electric motor and battery pack – good for a total output of 375kW.

Helped with the hybrid system, the Vision X-Coupe would be the most powerful rotary-powered model if it made it to production, overtaking the RX-7, RX-8, and the triple-rotor JC Cosmo on the performa

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