Mitsubishi Shipbuilding Ships First Units of Systems for Marine Ammonia-Fueled Engines

Mitsubishi Shipbuilding Ships First Units of Systems for Marine Ammonia-Fueled Engines

Contributing to Maritime Decarbonization with Ammonia Fuel Supply and Gas Abatement Systems

• Equipment can be remotely operated and automatically controlled, enhancing operational efficiency and safety

Tokyo, February 24, 2026

Mitsubishi Shipbuilding Co., Ltd., a part of Mitsubishi Heavy Industries (MHI) Group, has shipped an ammonia fuel supply system (AFSS) and an ammonia gas abatement system (AGAS) for Japan Engine Corporation (J-ENG). Both systems are designed for the first ammonia-fueled marine engine model 7UEC50LSJA-HPSCR manufactured by J-ENG and represent the first units produced by Mitsubishi Shipbuilding. Commissioning work for the systems will begin in due course.

Ammonia Fuel Supply System (AFSS) module. Image by Mitsubishi Heavy Industries, Ltd.

The AFSS supplies ammonia fuel to the engine in a stable and safe manner, while the AGAS safely processes surplus ammonia generated during fuel switching from ammonia to conventional fuel oil. Both systems support remote operation and automatic control through an integrated control system, enhancing operational efficiency and safety.

The early market introduction of these systems will enable onboard verification combining J-ENG's ammonia fueled marine engine model 7UEC50LSJA-HPSCR, a first mover in next-generation advanced fueled engines, with Mitsubishi Shipbuilding's AFSS and AGAS. This combination is expected to further accelerate decarbonization efforts across the maritime industry.

Mitsubishi Shipbuilding will continue strengthening its business structure to meet the growing demand for ammonia-fueled vessels.

About MHI Group
Mitsubishi Heavy Industries (MHI) Group is one of the world's leading industrial groups, spanning energy, smart infrastructure, industrial machinery, aerospace and defense.

MHI Group combines cutting-edge technology with deep experience to deliver innovative, integrated solutions that help to realize a carbon neutral world, improve the quality of life and ensure a safer world.

For more information, please visit www.mhi.com or follow our insights and stories on spectra.mhi.com.

Mitsubishi Heavy Industries, Ltd. press release