Yanmar Power Technology, a subsidiary of Yanmar Holdings, has completed a successful land-based test of a pilot-ignition hydrogen 4-stroke high-speed engine for power generation in coastal vessels. This test, part of the Nippon Foundation's zero-emission ship project, demonstrated operation at a rated output of around 500kW. The engine uses a small amount of diesel oil as the ignition source to burn a premixture of hydrogen and air, achieving the world's highest hydrogen fuel ratio. Yanmar plans to continue trials using biofuel as the pilot fuel and is working towards obtaining class certification for demonstration operations in 2026. Additionally, they are developing a pilot-ignition engine that will achieve zero emissions by co-firing biofuel with hydrogen and a spark-ignition engine burning hydrogen exclusively. The project also includes the development of a hydrogen engine-compatible hybrid electric propulsion vessel and a container unit-type hydrogen power generation system. The consortium involved in this project includes organizations like Kyoto University, Fukuoka Shipbuilding Co., Mitsui E&S Shipbuilding Co., and others. Yanmar's efforts aim to contribute to achieving zero-emission for coastal vessels through hydrogen energy by the 2030s.