TSUNEISHI SHIPBUILDING Co., Ltd. (Fukuyama, Hiroshima, Japan) has delivered “TEN-OH” as Japan’s first tugboat equipped with a BEH2YDRO hydrogen-powered internal combustion engine (ICE) on 15 October 2025 at the TSUNEISHI Factory.

The tugboat is equipped with a BEH2YDRO high-output hydrogen dual-fuelled ICE and a high-pressure hydrogen gas storage system with large-capacity and supply system, supplied by JPNH2YDRO — a joint venture between TSUNEISHI Group and CMB.TECH.

Hydrogen fuel is a clean fuel which emits no carbon dioxide when burned and is regarded as a key contributor to achieving carbon neutrality. This vessel was developed and built under The Nippon Foundation’s “Zero Emission Ships Project”, which aims to develop vessels with zero CO₂ emissions.

Tugboats play a vital role in assisting large vessels to safely and smoothly manoeuvre when entering or leaving port. For this reason, they must combine high manoeuvrability with strong engine output. The newly delivered tugboat is powered by twin 12-cylinder hydrogen-blended engines (4,400 horsepower class) and stores around 250kg of hydrogen in high-pressure tanks. This ensures operational performance equivalent to conventional fuel use, whilst enabling significant CO2 reductions. In the unlikely event of a hydrogen fuel system failure, the vessel can continue to operate solely on marine fuel, maintaining safety as the same standard as conventional vessels.

TSUNEISHI SHIPBUILDING will continue to promote the development and construction of next-generation fuel vessels, contributing to the realisation of a decarbonised society.

Message from the President
Mr OKUMURA Sachio, Representative Director, President & Executive Officer of TSUNEISHI SHIPBUILDING Co., Ltd. commented:
“It is a great honour to deliver Japan’s first hydrogen dual-fuelled tugboat. Across our domestic and overseas operations, we are developing vessels powered by next-generation fuels such as methanol and LNG. By building on the expertise gained through this project and leveraging the collective strength of the Group, we will continue to drive innovation and contribute to a more sustainable future for the maritime industry.”

■Related information
TSUNEISHI Launched the Japan’s First Hydrogen Dual-Fuelled Tugboat – Higher Power Output from the Hydrogen Internal Combustion Engine and Greener Shipbuilding Steel –
https://www.tsuneishi.co.jp/english/news/p556/

■Specifications
Length Overall: 38.0m
Breadth: 9.6m
Draft: 4.2m
Gross Tonnage: less than 300
Main Engine: BEH2YDRO Twin 12-cylinder hydrogen dual-fuelled ICE (4,400-horsepower class)
Fuel Used: Hydrogen and traditional marine fuels

■The Nippon Foundation Zero Emission Ships Project

The Nippon Foundation launched the Zero Emission Ships project to support developing ships with zero CO2 emissions. This project will develop and conduct demonstration testing of some of the world’s first ships powered by hydrogen combustion (zero-emission ships), working toward the realization of carbon neutrality in Japan’s coastal shipping industry by 2050.
Project Websites：https://www.nippon-foundation.or.jp/what/projects/zeroemission2050 (in Japanese only)

■TSUNEISHI SHIPBUILDING Co., Ltd.
TSUNEISHI SHIPBUILDING (HQ: 1083 Tsuneishi, Numakuma-cho, Fukuyama, Hiroshima, Japan) engages in shipbuilding and repairs, and is the anchor company of the TSUNEISHI Group, which conducts business mainly in the shipbuilding industry and maritime transport. With manufacturing bases in Japan (Tsuneishi Factory, the HQ), Philippines, and China, the company builds bulk carriers, container carriers, tankers, etc.
Company info：https://www.tsuneishi.co.jp/english/

Representative Director, President and Chief Executive Officer:　OKUMURA Sachio
Business:　Shipbuilding and repair
Founded:　July 1917 (Taisho 6)
Capital:　100 million yen
Employees:　901 (as of 1st January 2025) Shipbuilding Segment:　20,660
Headquarters:　Fukuyama, Hiroshima, Japan (Main Factory)

Shipbuilding Business Affiliates：
TSUNEISHI HEAVY INDUSTRIES (CEBU), Inc. (Cebu, Philippines)
http://www.thici.com/
TSUNEISHI GROUP (ZHOUSHAN) SHIPBUILDING INC. (Zhejiang, China)
http://www.tsuneishi-zs.com/
TSUNEISHI IRON WORKS Co., Ltd. (Fukuyama, Hiroshima, Japan)
https://www.tsuneishi.co.jp/iron-w/
TSUNEISHI ENGINEERING Co., Ltd. (Fukuyama, Hiroshima, Japan)
https://www.tsuneishi.co.jp/engr/
TSUNEISHI MIHO SHIPBUILDING Co., Ltd. (Shizuoka, Shizuoka, Japan)
https://www.tsuneishi.co.jp/miho/
TSUNEISHI KURE DOCKYARD Co., Ltd. (Kure, Hiroshima, Japan)
https://www.tsuneishi.co.jp/kure/
TSUNEISHI SOLUTIONS TOKYOBAY Co., Ltd. (Minato, Tokyo, Japan)
https://www.tsuneishi.co.jp/tokyobay/english/
TSUNEISHI YURA DOCKYARD Co., Ltd. (Hidaka, Wakayama, Japan)
https://www.tsuneishi.co.jp/yura/english/
NIIGATA SHIPBUILDING & REPAIR, Inc. (Niigata, Niigata, Japan)
https://www.tsuneishi.co.jp/niigata/
TSUNEISHI AKISHIMA LABORATORY Co., Ltd. (Akishima, Tokyo, Japan)
https://www.tsuneishi.co.jp/akishima/english/

For further information, please contact:
Corporate Communication and Group Branding Dept.
TSUNEISHI HOLDINGS CORPORATION
Email: pr@tsuneishi.com