Fabrication of Large Liquefied Hydrogen Storage Tank Launched - Toward the Establishment of Liquefied Hydrogen Supply Chain -

Tokyo, August 7, 2025 — Kawasaki Heavy Industries, Ltd. announced today that it has launched the fabrication of an above-ground flat-bottom cylindrical liquefied hydrogen storage tank with the storage capacity of 50,000 m³ at our Harima Works (Kako-gun, Hyogo) after passing the design audit to apply for the specialized facility inspection regulated by the High Pressure Gas Safety Act.

This tank is to be installed in the domestic terminal (Ohgishima, Kawasaki), which is planned to be constructed based on a Green Innovation Fund Project named “Liquefied Hydrogen Supply Chain Commercialization Demonstration Project” *¹ subsidized by the New Energy and Industrial Technology Development Organization (hereinafter NEDO), designating Japan Suiso Energy, Ltd. (JSE) as a managing company.

Hydrogen is being looked at as an ultimate clean energy which emits no CO₂ even when combusted; however, it poses key issues such as technological establishment and infrastructure development of storage facilities under a cryogenic environment of -253°C as well as upsizing of storage facilities intended for commercialization. Recently, by developing our unique structures and insulation system, we have started the construction work of the commercially-sized above-ground flat-bottom cylindrical liquefied hydrogen storage tank for the first time in the world. Therefore, the tank can store a greater amount of liquefied hydrogen compared with conventional above-ground spherical tanks in the vacuum heat insulation system.

Our years-long abundant know-how to manufacture flat-bottom cylindrical LNG storage tanks are incorporated into these tanks, together with our track record of manufacturing, operation and maintenance of spherical liquefied hydrogen storage tanks with a storage capacity of 540 m³ for Tanegashima Space Center, which was managed by NASDA (current JAXA)*² in the 1980s, as well as the design and manufacturing technologies for a spherical liquefied hydrogen storage tank*³ constructed at Kobe Airport Island in 2020 with the largest storage capacity in Japan of 2,250 m³.

We will contribute to the fulfillment of carbon-neutral societies by expanding our lineup through further upsizing of liquefied hydrogen storage tank and by actively promoting the establishment of a hydrogen supply chain while solving a variety of technical issues.