Yanmar Power Technology has completed a successful land-based demonstration test of a pilot-ignition hydrogen 4-stroke engine designed for power generation in coastal vessels. This 6-cylinder engine utilizes 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 and an output of approximately 500kW. The company is also working on developing a zero-emission engine by co-firing biofuel with hydrogen and a spark-ignition engine that exclusively burns hydrogen. Scheduled for 2024, the upcoming land-based demonstration tests aim to further showcase the capabilities of these hydrogen engines. The project is part of the Nippon Foundation's zero emission ship demonstration experiment, focusing on advancing hydrogen-powered, zero-emission vessels and supporting related technology development. Additionally, the project includes the development of a hydrogen engine-compatible hybrid electric propulsion vessel that integrates hydrogen engine generators with batteries. The vessel's design incorporates a container unit-type hydrogen power generation system on its upper deck and is being developed and constructed by Uyeno Transtech.