Debuting at this year's Tokyo Motor Show is Mazda's Kai concept, a potential preview of the next-generation Mazda 3 hatchback. The body reflects Mazda's Kodo design language with flowing lines and an aggressive look, thanks to the large grille, narrow headlights and prominent splitter. The car is built specifically to preview a new modular platform dubbed the SkyActiv-Vehicle Architecture, meant to reduce weight while increasing strength. It also packs the next-generation Skyactiv-X combustion engine, featuring Mazda's proprietary new compression ignition system, said to deliver the fuel efficiency, torque and initial acceleration response of a diesel powertrain. Mazda has announced that a production vehicle with the Skyactiv-X engine will launch in 2019, and it could be that this iteration of the Mazda 3 is the car that leads the charge.