Japan Bets on Ocean Floor to Power Clean Tech

Japan's 2026 deep-sea trial could challenge China's dominance and set a new course for clean tech minerals.

7 Jul 2025

Japan is preparing a bold experiment that could rewrite the global playbook for rare earth minerals. In January 2026, a three-week trial near Minamitorishima will attempt to lift mud from depths of 5,000 to 6,000 meters. The target is 35 tonnes of seabed mud, each tonne containing about two kilograms of rare earth elements. It will be the first large-scale test of its kind.

Rare earths are vital for electric cars, wind turbines, and advanced electronics, yet China dominates the supply chain. By pioneering seabed mining, Japan hopes to chart a more independent course and reduce reliance on land-based deposits.

The trial is only a first step. If successful, a pilot phase in 2027 would aim to recover up to 350 tonnes of mud per day. Such a leap could reposition Japan as a more self-sufficient supplier and shift the balance in a market critical to clean energy.

"The world cannot advance in clean energy while rare earths remain a choke point," said Shoichi Ishii, a senior official overseeing the project.

Japan's timing is no accident. Rising demand and geopolitical tension are intensifying the scramble for minerals. A successful test could spark global competition for untapped resources buried in the seabed.

But risks remain. Environmental groups warn of damage to fragile ecosystems, and scientists caution that long-term effects are largely unknown. Japan has pledged to monitor the trial closely and collect ecological data, though questions of sustainability hang over the effort.

Still, analysts see the move as bold. Proving that seabed mud can yield usable rare earths would diversify supply and ease scarcity fears.

For now, all eyes are on Japan. If its deep-sea gamble pays off, it could mark the start of a new era in resource security, with the ocean floor helping to power the world's clean energy future.