MITSUI E&S has officially commercialized its large ammonia dual-fuel marine engines and ammonia fuel supply systems (AFSS), becoming Japan’s sole manufacturer to provide both as an integrated package. Following successful ClassNK-witnessed land tests and official IMO NOx certification in early 2026, the company is now fully equipped to supply these zero-carbon propulsion systems for actual commercial vessels. To meet rising global demand, MITSUI E&S is expanding its testing facilities and establishing mass-production frameworks backed by key Japanese governmental funding initiatives.
Tokyo, Japan | August 20, 2026 – Marking a monumental leap forward for maritime decarbonization, MITSUI E&S Co., Ltd. has officially completed the commercialization of large ammonia-fueled marine engines and ammonia fuel supply systems (AFSS). As the only manufacturer in Japan producing both the engine and the supply system in-house, MITSUI E&S has established a comprehensive, turnkey supply framework to propel the practical implementation of ammonia-fueled shipping.
Key Technical & Commercial Milestones
- Commercialized Systems: Large ammonia dual-fuel marine engines and integrated AFSS.
- Land-Based Validation: Successfully completed integrated land tests in February 2026 for the MITSUI-Everllence B&W 7S60ME-C10.5-LGIA-HPSCR engine and AFSS, witnessed and certified by ClassNK.
- Regulatory Compliance: Fully verified in accordance with classification society rules, alongside official IMO NOx compliance certification.
- Strategic Expansion: Plans underway to expand land-based testing facilities for AFSS compatible with both Everllence and WinGD licensed engines, paired with a new mass-production framework.
Overcoming Technical Frontiers in Zero-Carbon Fuel
While ammonia is widely recognized as a promising next-generation marine fuel that emits zero carbon dioxide during combustion, its adoption has historically faced severe hurdles due to low ignitability, toxicity, and high corrosiveness. Ensuring absolute safety, reliability, and strict environmental performance has remained paramount.
Addressing these challenges head-on, MITSUI E&S finalized its onshore testing program in February 2026. The integrated operation of the ammonia dual-fuel engine model 7S60ME-C10.5-LGIA-HPSCR and the proprietary AFSS successfully passed rigorous evaluations by Nippon Kaiji Kyokai (ClassNK). With performance verified and NOx certification secured, the company is now fully cleared to supply these advanced propulsion systems for actual commercial vessels.
Scaling Up for Future Demand
To meet anticipated global market demand as shipowners pivot toward green corridors, MITSUI E&S is aggressively scaling its infrastructure. The company has already committed to expanding its land-based testing facilities for AFSS units capable of supporting both Everllence and WinGD licensed engines. Concurrently, a dedicated mass-production system is being established for both engines and supply units.
By leveraging its unique competitive edge, offering ammonia-fueled engines and fuel supply systems as a unified, integrated package, MITSUI E&S continues to expand its next-generation fuel lineup, steering the global maritime industry toward a zero-emission future.
Collaborative Support and Funding
The development of the AFSS was accelerated through the “Integrated Project for the Development and Social Implementation of Ammonia-Fueled Ships” under the Green Innovation Fund managed by the New Energy and Industrial Technology Development Organization (NEDO). Furthermore, the ongoing expansion of onshore testing facilities for the AFSS is supported by the “Project to Promote the Construction of Zero-Emission Ships,” a joint initiative of Japan’s Ministry of the Environment and the Ministry of Land, Infrastructure, Transport and Tourism.
About MITSUI E&S
MITSUI E&S is a leading global force in marine propulsion, holding the top domestic market share for large marine engines and providing comprehensive after-sales services and peripheral equipment, such as advanced fuel supply systems. Building on its legacy of engineering excellence, the company is actively pioneering next-generation green technologies, including the development of ammonia-dual fuel engines that emit no CO₂ during combustion. Through its state-of-the-art facilities and integrated manufacturing systems, MITSUI E&S delivers vital engineering solutions that support the maritime industry’s transition toward a sustainable, decarbonized future.
Source: MITSUI E&S