Yanmar Power Technology Co., Ltd., a group company of Yanmar Holdings Co., Ltd., has successfully completed a land-based demonstration test of a pilot-ignition hydrogen 4-stroke high-speed engine for power generation in coastal vessels, achieving operation at a rated output of approximately 500kW. This trial, part of the Nippon Foundation's zero emission ship demonstration experiment, involved using a small amount of diesel oil as the ignition source to burn a premixture of hydrogen and air. Yanmar plans to continue trials using biofuel as the pilot fuel and aims to obtain class certification for demonstration operations in 2026. The Nippon Foundation's Zero-Emission Ship Project focuses on hydrogen-powered, zero-emission ships, incorporating hydrogen engine-compatible hybrid electric propulsion vessels. Yanmar is also developing a similar biofuel co-firing engine and a spark-ignition engine to achieve zero emissions for coastal vessels by 2030. The project involves consortium members responsible for vessel design, construction, and technical development of hydrogen engines.