The hatch concept shows off a long hood, angular headlights, and possibly a more raked roofline than the current Mazda3.
From some angles, it's a case of subtle evolution - the tail lights and C-pillar treatment on the hatchback concept, dubbed the "product concept model" for now, are identifiably "Mazda3" in their shape and positioning.
The Skyactiv-X technology forces the petrol to combust under extremely high compression, a move that will increase fuel efficiency by up to 17 per cent. That, of course, can mean anything.
Mazda's second concept slated for Tokyo is less obvious.
Mazda has prepared a study on the styling of future models based on the KODO design language. Speaking with AutoExpress, Mazda R&D boss Matsuhiro Tanaka said, "With the Tokyo Motor Show, we will be introducing a new design concept".
The first one, christened as the Next-Generation Design Vision and seen above, looks to be a sleek, four-door affair made for the sole goal of showing off the brand's overall design future.
That comment brings up a whole host of questions on Mazda's plans to revive the rotary engine.
The Mazda stand at the show will also be presenting the CX-8, the firm's latest crossover, which will launch on the Japanese market before the end of this year, and the limited-edition Mazda MX-5 Red Top series, which is distinguished by a cherry red roof and auburn Nappa leather upholstery. But when you step on it, the Skyactiv-X acts like a regular supercharged Atkinson-cycle gas engine.