Japan and the lack of salt caverns to store hydrogen

A hydrogen import strategy assumes somewhere to keep what arrives outside peak demand. Ashraf Abdel Haleem's post describes Japan's position: limited salt-cavern potential, unlike Germany, the Netherlands and the UK, with depleted gas reservoirs under assessment for seasonal storage and fields in Niigata, among them Sekihara, Kumoide and Katakai, identified as candidates.

The scale this serves sits in Japan's Basic Hydrogen Strategy, revised on 6 June 2023. According to a market report by New Zealand's Ministry of Foreign Affairs and Trade, dated November 2023, the country targets 3 million tonnes of hydrogen a year in 2030, 12 million in 2040 and 20 million in 2050, with 15 trillion yen of public and private investment over fifteen years.

Production and imports settle the annual volume, not the gap between the month hydrogen arrives and the month it is used. Without its own seasonal storage, the chain depends on ships arriving at the pace of demand, which pushes risk onto logistics and raises the cost of the supply contract.

That is why mapping depleted reservoirs matters as much as the tonnage target. Confirming that Niigata fields hold hydrogen with acceptable losses is what allows imports to be sized by annual consumption rather than by port capacity in a peak month.