EnergyKawasaki Heavy, Toyota develop small generators, sports cars and moreKawasaki Heavy Industries is focusing on developing smaller hydrogen engines than this six-cylinder unit. (Photo by Eisaku Nitta)EISAKU NITTA and RYO ASAYAMAJuly 3, 2026 05:28 JSTTOKYO/NAGOYA, Japan -- Hydrogen-fueled combustion engines are gaining traction as a lower-cost alternative to fuel cells, with development in a broad range of mobility devices a potential tailwind for widespread adoption of the environmentally friendly fuel.