Mazda brought two landmark concepts to the 2017 Tokyo Motor Show: the Kai Concept, a production-intent hatchback previewing the next-generation Mazda3 with the groundbreaking SkyActiv-X compression-ignition engine, and the Vision Coupe Concept, a sleek four-door coupe showcasing the brand's long-term Kodo design aspirations. Alongside the concepts, Mazda put the SkyActiv-X engine and its supporting lightweight body architecture on full display, illustrating the technical ambition behind the next