Mitsubishi Heavy Industries Engine & Turbocharger, a part of Mitsubishi Heavy Industries (MHI) Group, has made significant progress in utilizing 100% hydrogen fuel for power generation. The successful trial run of a 500kW-class hydrogen engine generator set at the Sagamihara Plant demonstrated stable operation throughout the system's phases. This achievement marks a crucial step towards commercialization after rigorous safety and reliability evaluations. The development of reciprocating engines that can combust diverse fuels, particularly 100% hydrogen, holds promise in the energy transition towards a low-carbon society. The company's focus on green hydrogen production through initiatives like the 'P2G' system in Yamanashi Prefecture aligns with its goal of achieving carbon neutrality by 2040. By emphasizing safety measures and stable combustion, Mitsubishi aims to contribute to a decarbonized society through the adoption of hydrogen technologies. The demonstration test not only showcased the practical application of hydrogen engine generator sets but also underlined the importance of utilizing green hydrogen for sustainable energy solutions.