TSUNEISHI SHIPBUILDING Co., Ltd., based in Fukuyama, Hiroshima, has delivered “TEN-OH,” Japan’s first tugboat equipped with a hydrogen-powered internal combustion engine (ICE). The milestone delivery on 15 October 2025 marks a significant step toward carbon-neutral maritime operations.
Hydrogen Technology for Cleaner Ports
The tugboat is powered by a BEH2YDRO high-output hydrogen dual-fuelled ICE and features a high-capacity hydrogen storage and supply system supplied by JPNH2YDRO, a joint venture between TSUNEISHI Group and CMB.TECH. Hydrogen is a clean fuel, producing zero carbon dioxide emissions when burned, making it a key contributor to carbon neutrality. Built under The Nippon Foundation’s “Zero Emission Ships Project,” TEN-OH demonstrates the practical application of hydrogen technology in demanding port operations.
Performance and Safety Features
Designed for high manoeuvrability and strong engine output, TEN-OH is equipped with twin 12-cylinder hydrogen-blended engines delivering 4,400 horsepower and storing approximately 250kg of hydrogen in high-pressure tanks. The tugboat achieves operational performance equivalent to conventional vessels while significantly reducing CO₂ emissions. Importantly, in the unlikely event of a hydrogen system failure, the vessel can seamlessly switch to conventional marine fuel, maintaining the same safety standards as traditional tugs.
Mr. OKUMURA Sachio, President of TSUNEISHI SHIPBUILDING, emphasized that TEN-OH represents a major step in next-generation fuel vessel development. The company plans to continue advancing methanol, LNG, and hydrogen-powered vessels, contributing to a sustainable and decarbonized maritime future.
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Source: TSUNEISHI
