Hydrogen investment follows existing demand: lessons from Japan’s Chiba project
The hydrogen economy is often discussed in terms of new applications: trucks, ships, steelmaking and energy storage. Yet established industrial users remain central to its development. A recent investment decision by Cosmo Energy and Iwatani in Japan illustrates the importance of connecting hydrogen production with identifiable customers—and why infrastructure investment should not automatically be equated with decarbonisation.
Walerian Majewski ·
The project offers a useful lesson in commercial development.
A concrete investment anchored in industrial demand
On 6 October 2026, Cosmo Energy and Iwatani announced a final investment decision for a hydrogen project at Cosmo Oil’s Chiba Refinery in Ichihara, Japan.
The announcement covers approximately JPY 20 billion to restore an idle hydrogen production unit with a capacity equivalent to 80 tonnes per day, alongside approximately JPY 30 billion for a new liquefaction plant with a capacity of 11.6 tonnes per day. Both are scheduled to begin operating in 2030.
The planned supply chain has two branches: hydrogen for Cosmo’s petroleum refining operations and hydrogen for Iwatani to liquefy and distribute to external customers. Liquefaction processes part of the production output; it should not be counted as additional hydrogen production. Cosmo Iwatani Hydrogen Engineering LLC will undertake engineering, procurement and construction.
The project’s significance lies in this connection between production and use. It links investment to an established industrial requirement while creating a route to a broader customer base.
Hydrogen already has a substantial market
The wider context helps explain why industrial sites feature prominently in hydrogen investment.
According to the International Energy Agency, global hydrogen demand exceeded 100 million tonnes in 2025, with industry and refining accounting for almost all consumption. New applications were growing but still represented a very small share. Low-emissions hydrogen production, meanwhile, reached almost 1 million tonnes after growing by around 20% during the year.
The figures reveal an important distinction. The existing hydrogen market is already large. The market for replacing its supply with lower-emissions alternatives—and extending hydrogen into new uses—is at a much earlier stage.
Refining is a major part of this picture, but not the whole picture. Ammonia and methanol production also underpin established demand. The strongest conclusion is therefore not that hydrogen development belongs exclusively to refineries, but that existing industrial customers provide a practical foundation for investment.
Why an existing customer matters
For a developer, an industrial customer that already uses hydrogen answers several questions before construction begins.
The customer can define the required volumes, purity, pressure and reliability of supply. Its operating experience can help shape the production facility. Locating supply close to consumption may also reduce the need to build an entirely new distribution system.
Compare that with a project that must simultaneously secure electricity or feedstock, build production capacity, develop transport infrastructure and persuade customers to adopt hydrogen for the first time. Each element may be achievable, but their interdependence makes execution more demanding.
Existing demand does not remove all risk. A customer’s need for hydrogen is not the same as its willingness to pay a premium for a lower-emissions product. Nor does an established industrial site guarantee financing or competitive production costs.
Nevertheless, a clearly defined use provides a stronger starting point than an assumption that customers will appear once supply becomes available.
Market growth and decarbonisation are different measures
The debate benefits from separating three developments that are often combined under the heading of “hydrogen growth”.
The first is investment in supply reliability, replacement capacity or distribution. The second is the substitution of emissions-intensive hydrogen with lower-emissions production. The third is the introduction of hydrogen into applications that previously relied on other technologies or fuels.
These developments can overlap, but they are not interchangeable.
Restoring a production unit may strengthen industrial resilience without necessarily changing emissions intensity. A replacement project may reduce emissions without increasing the total amount of hydrogen consumed. A new application may expand demand, but its environmental benefit depends on both hydrogen