Mitsui E&S has recently retrofitted a near-zero emission diesel engine rubber-tyred gantry (RTG) crane at Japan's Yokohama Port Minami-Honmoku Pier Container Terminal with a hydrogen fuel cell power pack. This innovative move has led to the RTG undertaking zero-emissions field trials at the container terminal, operated by Utoc Corporation. Mitsui E&S, a company with a history of developing cargo handling equipment utilizing hydrogen fuel, is working towards achieving zero emissions at ports. In the past, in May 2024, the company deployed the world's first hydrogen-powered RTG for trials at the Port of Los Angeles. The newly retrofitted RTG at Yokohama Port is designed for an easy transition to zero-emission operation once there is proper hydrogen supply infrastructure in place. By equipping the RTG with a larger lithium-ion battery and downsizing the diesel engine, it is aimed at reducing emissions effectively. Mitsui E&S plans to further advance technological development to reduce the environmental impact of ports by providing cargo handling equipment powered by hydrogen fuel.