MITSUI E&S Co., Ltd. has successfully replaced the diesel-engine generator on a near-zero-emission rubber-tired gantry crane at the Minami-Honmoku Pier Container Terminal in Yokohama, Japan, with a hydrogen fuel-cell power pack. The retrofit, done with technical support from MITSUI E&S, is now part of Utoc Corporation's on-site demonstration project, showcasing the crane operating solely on hydrogen fuel and eliminating CO₂ emissions during cargo handling. This initiative aligns with Japan's push towards sustainable solutions, as demonstrated by the Ministry of Land, Infrastructure, Transport and Tourism's announcement of hydrogen-powered RTG crane demonstrations at Yokohama Port and Kobe Port. MITSUI E&S's involvement in such projects extends globally, with previous trials in Tokyo and the commercial operation of the world's first fuel-cell RTG at the Port of Los Angeles through its U.S. unit. The company's specialization in heavy machinery, naval vessels, and logistics systems positions it as a key player in driving innovation towards cleaner and more sustainable port operations. Utoc Corporation, as the operator of the Minami-Honmoku Pier Container Terminal, plays a crucial role in hosting this hydrogen RTG demonstration project, emphasizing the collaborative efforts to adopt eco-friendly technologies in the maritime industry.