Uyeno Transtech’s new hydrogen-fueled oil tanker, Kikou Maru, has received the highest environmental rating under Japan’s Zero-Emission Accelerating Ship Finance Program. The project signals a major step toward clean coastal shipping.
Japan’s energy transport sector is taking a visible step toward decarbonization with the launch of Kikou Maru, a hydrogen-fueled demonstration oil tanker owned by Uyeno Transtech Ltd. The vessel has earned the highest environmental evaluation from ClassNK under the Zero-Emission Accelerating Ship Finance Program, a joint initiative between Development Bank of Japan (DBJ) and ClassNK.
The program, designed to support investments in low- and zero-emission ships, evaluates vessels on their decarbonization potential, environmental performance and innovation. Ships that score highly can qualify for DBJ financing. Kikou Maru received an “S” rating, the top rank under the program.
“Sea transport is entering a major transition period, and our aim is to realize zero emissions through technological innovation,” Uyeno Transtech said in a statement. “The Kikou Maru embodies our vision to be the energy for leading our industry and the world to a sustainable future.”
Built at the Nagasaki Yard of Fukuoka Shipbuilding Co., Ltd. and delivered in October 2025, Kikou Maru is designed for electric propulsion and equipped with lithium-ion batteries to optimize fuel consumption. It is also “hydrogen fuel ready,” with hull and compartment designs meeting requirements for future hydrogen tank installation. In 2026, the vessel is scheduled to conduct one of the world’s first demonstration voyages powered by hydrogen, under the Nippon Foundation’s Zero Emission Ships project.
According to ClassNK, the ship’s advanced design and environmental investment justified its highest rating. The classification society emphasized that Kikou Maru demonstrates the kind of innovation needed to move the coastal shipping sector toward low-carbon operations.
DBJ said its role in the program is to promote sustainable management and regional revitalization by supporting decarbonization in core industries. “DBJ will continue to contribute to sustainable societies and regional revitalization,” the bank noted, adding that its GRIT Strategy focuses on green initiatives, resilience, innovation and transition.By combining technical evaluation from ClassNK with targeted financial support from DBJ, the program provides a framework for shipowners to develop practical pathways toward cleaner operations. As Kikou Maru prepares for its first hydrogen-powered voyage, Japan’s domestic shipping sector may be charting a new course toward zero emissions.
