Japan has taken a major step in clean shipping. A consortium led by Japan Engine Corporation and Kawasaki Heavy Industries has successfully tested the world’s first hydrogen-fueled main engine for a large commercial vessel.
This engine is designed for deep-sea cargo ships, not just small vessels. That makes it a key milestone. Most earlier hydrogen ship projects focused on ferries or short routes.
The 3% Problem: Shipping’s Emissions Challenge
The engine is a low-speed, two-stroke design. This is the standard for large ocean-going ships. It can run mainly on hydrogen fuel. In tests, it achieved about 95% hydrogen use at full load, showing stable performance.
The engine will be installed on a 17,500-deadweight-ton multipurpose vessel. The ship is expected to be delivered in 2027. It will then undergo a three-year demonstration period starting in 2028.
Shipping is a major source of global emissions. The sector produces about 2–3% of global greenhouse gas emissions, based on data from the International Maritime Organization (IMO).
Most ships today use heavy fuel oil or marine diesel. These fuels produce high emissions. As global trade grows, shipping emissions could increase without new solutions.
Hydrogen is one option. When used as a fuel, it produces no carbon dioxide at the point of use. This makes it attractive for long-term decarbonization.
However, scaling hydrogen for large ships has been difficult. Key challenges include fuel storage, engine design, and safety. Japan’s latest engine test shows that progress is being made.
How Hydrogen Engines Work in Large Vessels
Hydrogen-powered ships can use fuel cells or combustion engines. Japan’s new system uses combustion. This means hydrogen burns inside the engine, similar to diesel. This approach allows easier integration with existing ship systems. It also reduces the need for full redesigns of vessels.
The engine uses liquid hydrogen fuel and advanced injection systems. Engineers have focused on stable combustion and material strength. Hydrogen burns faster than traditional fuels, so precision is critical.
The project includes partners such as Mitsui O.S.K. Lines (MOL), Onomichi Dockyard, and ClassNK. These groups support design, safety checks, and future operations.
The move is part of Japan’s Green Innovation Fund. The Ministry of Economy, Trade, and Industry has funded the program with about 2 trillion yen to help the country reach carbon neutrality by 2050.
Japan’s Net Zero Strategy and Hydrogen Push
This hydrogen engine project fits into Japan’s broader climate strategy. The country has pledged to reach net-zero greenhouse gas emissions by 2050. This goal was announced by former Prime Minister Yoshihide Suga in 2020.
Japan sees hydrogen as a key part of its energy transition. Under its Basic Hydrogen Strategy, the government aims to expand hydrogen use across power, transport, and industry.
Japan plans to increase its hydrogen supply to 20 million tonnes per year by 2050, up from much lower current levels. The country is also investing in hydrogen imports, storage, and infrastructure.
Shipping plays a major role in this plan. Japan depends heavily on imports of energy and raw materials. Decarbonizing shipping is important for both climate and energy security.
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Projects like the hydrogen engine help link domestic policy with global action. They support Japan’s goal to build a full hydrogen value chain, from production to transport and end use.
Current Hydrogen Ferries in Operation
Japan has already started using hydrogen-powered ferries on real routes. One example is the Hanaria. This hybrid ship uses hydrogen fuel cells, lithium-ion batteries, and biodiesel. It began service in Kitakyushu in April 2024.
The ship can cut carbon dioxide emissions by 53% to 100% compared to regular vessels. It was built for a unit of Mitsui O.S.K. Lines and uses fuel cell technology developed with parts from Toyota.
Another example is the Mahoroba, built by Iwatani Corporation. This is a zero-emission hydrogen catamaran that can carry up to 150 passengers. It started commercial service in April 2025, transporting visitors to the Osaka-Kansai Expo.
In October 2025, the Tokyo Metropolitan Government agreed to bring the vessel to Tokyo Bay. It is expected to start operating there in fiscal year 2026. It will support environmental education and international events.
Japan has also invested in hydrogen transport systems. One example is the Suiso Frontier, which was launched to carry liquefied hydrogen across long distances. These efforts show that Japan is not only testing technology but also building the systems needed to scale hydrogen use globally.
From Ferries to Freighters: Scaling Hydrogen at Sea
Japan is part of a wider global shift. Many countries are testing hydrogen and other clean fuels for shipping.
For example, Norway launched the MF Hydra in 2023. Belgium introduced the Hydrotug 1 in 2024.
However, most of these vessels are small or operate on short routes. Japan’s project targets large cargo ships, which are more complex and more impactful for emissions.
Governments are also exploring hydrogen shipping corridors. These are planned routes where hydrogen-powered vessels can operate with proper fueling infrastructure. This global activity shows that hydrogen is moving from early testing to larger applications.
A $300B Hydrogen Market Meets Maritime Demand
The hydrogen economy is expanding quickly. Global demand is rising as industries look for low-carbon solutions.
Industry estimates suggest the global hydrogen market could exceed US$300 billion by 2030. Growth is driven by energy, transport, and industrial use.
In shipping, hydrogen competes with other fuels like ammonia and methanol. Each has strengths and challenges. Hydrogen stands out for its zero carbon emissions at the point of use.
Cost, Storage, and Infrastructure Barriers
Still, hydrogen has limits. Several barriers remain before hydrogen ships become common:
- High costs compared to traditional fuels,
- Limited supply of green hydrogen,
- Lack of port infrastructure, and
- Strict safety requirements.
Despite these issues, investment is growing. Governments and companies are funding research, pilot projects, and infrastructure.
Japan’s demonstration project will help address those gaps. The planned three-year trial will provide real-world data on performance, safety, and costs. If successful, hydrogen engines could become a practical option for large vessels. This would help reduce emissions from global shipping.
Can Hydrogen Power the Future of Global Trade?
Japan’s hydrogen engine test marks a key moment for the shipping industry. It shows that hydrogen can power not only small vessels but also large commercial ships.
The link to Japan’s net-zero strategy makes this development even more important. It connects national policy with global climate goals.
The coming years will shape how fast hydrogen shipping grows. With strong policy support and continued innovation, hydrogen could play a major role in building a low-carbon maritime sector.
The post Japan Unveils First Hydrogen Engine for Large Ships appeared first on Carbon Credits.
Nature-based carbon investments deserve consideration when they address a specific business dependency and produce outcomes you can measure. Imagine Moonbucks, a global coffee roaster planning next season’s espresso blend. It is considering natural Grade 4 coffee from Jimma, in southwestern Oromia, Ethiopia. Its sourcing decisions affect the roasting schedule and the cash tied up in coffee purchases. Moonbucks needs to understand which measures could protect that supply, what they would cost and how it would judge the results.
1. Define the sourcing problem before choosing a project
Moonbucks needs a dependable component for its espresso blend. Its procurement team wants continuity of volume and an agreed cup profile. Replacing a shipment at short notice could require new sample approval and changes to the blend, and given the schedules for cultivation, processing, and freight delivery, is practically impossible. Moonbucks needs to get this right, and its initial concern is inconsistent deliveries. It commissions an assessment of the supplying farms and post-harvest chain. The questions cover land condition, harvest availability and whether drying or storage problems are affecting saleable lots.
This distinction changes the investment brief. A tree-planting proposal cannot be assumed to fix drying problems. Better storage cannot restore eroded land. The team must establish which problem exists before selecting the response.
CCC’s guide to finding nature-based solutions in your supply chain explains where to look. Here, the next task is to turn a broad concern into a testable proposal.
2. Develop nature-based carbon investments around the actual supply chain
The assessment would trace Moonbucks’ purchases back through the exporter and supplying producer groups. Which farms supply the contracted lots? Who controls land-management decisions? How long does the buyer expect to maintain the purchasing relationship?
Furthermore, Jimma natural Grade 4 cannot be treated as interchangeable with every Ethiopian coffee. Moonbucks would need to test any substitute against its own blend and quality requirements.
Suppose Moonbucks’ assessment identifies an opportunity to maintain shade trees and restore vegetation along exposed streambanks. The IPCC describes agroforestry as a way to store carbon in vegetation and soil, with potential benefits for erosion control and water quality.1 Moonbucks would need local advice on species, growing conditions and maintenance before deciding how these measures fit its sourcing plan.
The proposal now has a defined sourcing connection and a candidate intervention. The next steps are to test its effect on production, assess carbon eligibility and build the financial case.
3. Compare the proposal with other ways to protect supply
WBCSD’s Nature-based Solutions Blueprint recommends comparing nature-based options with other responses across their benefits and costs.2 For Moonbucks, that means evaluating the landscape proposal alongside drying improvements, storage controls and alternative sourcing arrangements.
The product’s natural-process designation matters. Moonbucks should examine the drying and dry-milling chain alongside land conditions. Its team would check storage practices, contamination risks and incoming-lot quality to see whether problems arise before or after the coffee leaves the farms.
The revised proposal might combine land stewardship with separate post-harvest controls. Each component needs its own purpose and budget. A sustainability label should not obscure which activity is expected to solve which problem.
The project develops as the evidence improves. Its scope should follow the diagnosis rather than preserve the first idea unchanged.
4. Establish what the carbon outcome could count toward
Moonbucks’ sustainability team now tests the proposed carbon case separately from the sourcing case. Is the objective a measurable change in Moonbucks’ value-chain emissions, verified credits for separate voluntary use, or distinct outcomes under carefully defined arrangements?
Scope 3 covers value-chain emissions. A purchasing relationship alone does not prove that a farm intervention can be included in Moonbucks’ inventory. The team needs an applicable accounting method, defensible boundaries and evidence supporting attribution.
SBTi’s FLAG Guidance (forest, land and agriculture), version 1.2, says purchased credits used as offsets cannot meet near-term FLAG or energy and industry targets. Eligible land-based removals are subject to accounting requirements.3 Moonbucks needs to test its proposal against those rules before including an outcome in its targets.
For Moonbucks’ Jimma proposal, maintaining existing trees and establishing new vegetation could involve different carbon questions. Specialists must examine the baseline and additionality, meaning what changes because the project proceeds. They must also assess measurement and the risk that stored carbon is lost. CCC’s MRV and additionality article introduces those tests.
Until that work is complete, Moonbucks should not budget an assumed Scope 3 reduction or credit-sale receipt. Direct emissions reductions remain the priority.
5. Build a financial case that survives weaker assumptions
Moonbucks’ finance team would now build a multi-year budget. UNEP’s State of Finance for Nature 2023 compares current finance with the investment needed to meet climate, biodiversity and land-restoration goals.4 The company would cost its proposed activities, farmer participation and ongoing monitoring. Verification, where required, is a separate expense. Maintenance and responsibility for replacing failed plantings must remain visible after the initial establishment budget ends.
Operational benefits need equally careful treatment. If fewer rejected lots reduce emergency purchasing, count that saving once. Do not add “supply resilience” as another financial benefit when it represents the same avoided cost.
Moonbucks should compare a base case with slower benefits, higher implementation costs and no carbon revenue. It should also distinguish production outcomes from quality and shipment outcomes. A single good harvest would not prove that the landscape intervention caused better delivery performance.
A project can remain worth funding even when its carbon case needs more work. That decision must rest on the operational evidence and the company’s objectives, without unsupported environmental claims.
6. Fund a pilot with a clear expansion decision
Moonbucks’ first approval would fund a bounded pilot, rather than commit the entire sourcing program. Before spending, Moonbucks would agree on participating farms, responsibilities and the evidence needed at review.
Its scorecard could track farmer participation, implementation costs and plant survival, alongside accepted coffee volumes and lot-quality results. Carbon measurements would follow the selected method. Farm-level traceability must connect the intervention to the actual sourcing relationship.
Suppose Moonbucks’ review later finds that storage changes explain most quality improvements, while the land measures need longer observation. Those findings would shape the next decision: expand the proven component, adjust the landscape work or pause further spending. They would not justify crediting all improvements to tree planting.
This gives nature-based carbon investments a practical place in a multi-year strategy. Funding increases as the evidence supports it, and the project can change direction before a larger commitment.
Discuss a sourcing opportunity with CCC
Carbon Credit Capital’s nature-based supply-chain investment service uses its Dual-Value Model to examine supply-chain economics alongside potential sustainability outcomes.
Schedule a consultation to discuss your sourcing exposure and the questions to resolve before allocating capital.
Sources
- Intergovernmental Panel on Climate Change (IPCC), Climate Change 2022: Mitigation of Climate Change, Chapter 7, Agriculture, Forestry and Other Land Uses, section 7.4.3.3 (Agroforestry).
- World Business Council for Sustainable Development (WBCSD), Nature-based Solutions Blueprint, 5 June 2024.
- Science Based Targets initiative (SBTi), Forest, Land and Agriculture Science-Based Target-Setting Guidance, version 1.2, March 2026, section 3.1.4, pp. 37–38.
- United Nations Environment Programme (UNEP), State of Finance for Nature 2023, 2023.
A plastic credit funds the collection of plastic waste in places where no formal system exists to collect it. Each credit represents a measured, independently audited quantity of plastic taken out of the environment or returned to use, tracked on a public registry.
EU carbon credit claims changed on 27 September 2026, the day the Directive (EU) 2024/825 began to apply across the European Union. The change is narrow. It changes how a company can talk about the credits it buys. A product can no longer be called neutral on the strength of compensation alone; however, every specific, evidenced statement about what a company measured, reduced, and funded stays fully available.
