Yanmar Energy Systems (Yanmar ES) and Daigas Energy in Osaka, Japan, showcased the successful blending of hydrogen into fossil gas in a 400 kW cogeneration system. The EP400G unit, equipped with Daigas Energy's hydrogen supply equipment, demonstrated equal performance levels with a 30% hydrogen share as when operating solely on natural gas. This successful demonstration paves the way for potential commercialization of hydrogen-blended cogeneration systems, with a focus on contributing to a carbon-neutral society. The testing, conducted at Daigas Energy's Carbon Neutral Research Hub ANNEX Torishima Site in Osaka City, highlighted stable operation with low nitrogen oxide emissions. Yanmar expressed commitment to further improving cogeneration systems using hydrogen fuel and other technologies. Notably, similar successful hydrogen blending tests have been reported by E.ON Romania and Wien Energie in Austria, indicating a growing global interest in harnessing hydrogen technology for sustainable energy solutions.