The Japan Mobility Show kicks off in Tokyo this week, and Mazda is using the occasion to show off a couple of concepts it says embody a theme called “the joy of driving fuels a sustainable tomorrow.” One of these is the Vision X-Coupe, which Mazda says shows off the evolution of its KODO design language—something we first saw at the Tokyo show a decade ago.

You can see a clear visual link between the renderings of the Vision X-Coupe and some of Mazda’s current models like the 3 hatchback or the CX-30 crossover, but translated through the long, low form factor of a four-door coupe. The design language is perhaps less interesting than some of the sustainability ideas that Mazda is exploring here, though.