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. Mazda There's definitely hints of the Mazda RX-Vision in this shape. There's definitely hints of the Mazda RX-Vision in this shape. Mazda Mazda It's a four-seat, four-door coupe. It's a four-seat, four-door coupe. Mazda Mazda Fun to drive AND sustainable? Sign us up. Fun to drive AND sustainable? Sign us up. Mazda It's a four-seat, four-door coupe. Mazda Fun to drive AND sustainable? Sign us up. Mazda The powertrain is a 503 hp (375 kW) plug-in hybrid that uses a two-rotor turbocharged rotary engine as the internal combustion part of the equation. Mazda says it should have a total range of 500 miles (800 km), with a range of 100 miles (160 km) on battery power alone. But running the Vision X-Coupe’s engine shouldn’t cause too much guilt. “After years of studying fuels and CO2 exhaust, Mazda now envisions a future where the more kilometers you drive, the more you help reduce CO2,” said Mazda president and CEO Masahiro Moro. “We believe this is achievable with two technologies: one, carbon-neutral refined fuel from microalgae and two, capture CO2 from [the] vehicle,” Moro said.