Maritime

Japan Moves Ahead With Hydrogen Engine for Large Ships

Japanese companies advanced a hydrogen-fuelled engine programme for large ships after a full-scale two-stroke test achieved more than 95% co-firing at full load. The engine is due for delivery in January 2027.

Hydrogen-fuelled 17,500 dwt MPP vessel (Image credit: J Eng)

30, March 2026
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A group of Japanese companies has advanced work on a hydrogen-fuelled engine for large vessels after completing a full-scale test of a two-stroke engine across all cylinders.

The project involves Japan Engine Corporation and Kawasaki Heavy Industries, working with Mitsui O.S.K. Lines, MOL Drybulk and other partners. In a joint statement, the companies said they carried out hydrogen co-firing operations across the full engine.

The test delivered a hydrogen co-firing ratio of more than 95% at full load, showing stable performance and pointing to significant greenhouse gas reduction potential.

Unlike earlier hydrogen projects centred on smaller or short-range vessels, the programme is aimed at deep-sea shipping. It combines a high-output engine with liquefied hydrogen fuel for large-ship applications.

The engine is scheduled for delivery in January 2027 and will be installed on a 17,500 dwt multipurpose vessel under construction at Onomichi Dockyard.

The vessel is expected to begin a three-year demonstration programme from FY2028 under Mitsui O.S.K. Lines, while ClassNK will oversee safety compliance and evaluation.

Tags: decarbonisation, deep-sea shipping, hydrogen fuel, Japan shipping, marine engines

Editorial Note:
This article was prepared with the assistance of AI tools to enhance clarity and efficiency.
All information has been reviewed and verified by the HMT News editor.

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