Mitsubishi Heavy Industries Engine & Turbocharger, Ltd. (MHIET), a division of Mitsubishi Heavy Industries (MHI) Group, has unveiled a new gas cogeneration system, the SGP M450, capable of hydrogen co-firing at up to 15 vol%, developed in partnership with Toho Gas Co., Ltd. The system is specifically designed for the Japanese market. The GS6R2 city gas mono-firing engine was modified to incorporate hydrogen co-firing capabilities through adjustments to the fuel gas and engine control systems. Extensive testing, surpassing 500 hours, was conducted at the Toho Gas Technology Research Institute, affirming the system's reliability in hydrogen mixing and its ability to reduce CO2 emissions. The system offers two operating modes: city gas mono-firing and hydrogen co-firing, with a hydrogen blend ratio limited to 15 vol% to maintain compatibility with conventional natural gas engines. Additionally, a 'Hydrogen Ready' package is available for customers looking to transition to hydrogen use in the future, facilitating a smooth conversion process. Cogeneration systems like the SGP M450 are recognized for their environmental benefits in energy conservation and their contribution to achieving carbon neutrality. They also enhance resilience by providing reliable power sources during emergencies. Mitsubishi Heavy Industries aims to advance hydrogen utilization and distributed power generation, supporting a low-carbon, decarbonized world while bolstering societal resilience.