Mitsubishi Heavy Industries Engine & Turbocharger, Ltd. (MHIET) has launched a new 450kW gas cogeneration system, the SGP M450, developed in collaboration with Toho Gas Co., Ltd., specifically designed for hydrogen co-firing at a maximum of 15 vol%. By modifying the fuel gas and engine control systems of the GS6R2 city gas engine, the system has undergone extensive demonstration testing to ensure reliability in hydrogen blending and CO2 emissions reduction. The successful testing confirmed stable operation without the risk of abnormal combustion, highlighting its suitability for diverse operating conditions. The system allows for seamless switching between city gas mono-firing and hydrogen co-firing modes, ensuring operational continuity even during power outages, bolstering business continuity plans. Additionally, a 'Hydrogen Ready' package is offered to facilitate future transition to hydrogen use, emphasizing MHIET's commitment to promoting hydrogen utilization and distributed power generation for a sustainable, low-carbon future. This innovation aligns with the global shift towards carbon neutrality and resilience in energy systems, positioning cogeneration systems as key contributors to environmental sustainability and energy security.