Japan Uncovers Vast Rare Earth Deposit to Cover 700 Years of Global Demand

A patch of ocean floor is being hailed as the card that could loosen China’s grip on the world’s high-tech components.

The research vessel Chikyu led the mission, retrieving sediment rich in rare earths from 6,000 meters below the surface. (Photo: Gleam, Wikimedia Commons) 

But with the bounty locked six kilometers deep, the question remains: Who wins the race — the miners, the refiners, or the planet? Quentin Couprie reported for the digital trade journal 3DVF.

Six thousand meters beneath the Pacific, the research ship Chikyu has pinpointed a rare earth cache in Japan’s waters near Minami Torishima.

Packed with dysprosium and yttrium — key elements for high-performance magnets, lasers, and defense technology — the trove is measured in centuries, not years.

For a nation that sources about 70% of its critical metals from China, while Beijing controls 92% of refining capacity, the strategic impact is immediate.

Officials in Tokyo tout enhanced resource security even as engineers grapple with the costs of deep-sea operations and extreme pressures, with industrial-scale trials slated for 2027.

On Feb. 2, 2026, Japan unveiled a vast trove of rare-earth elements that could meet more than 700 years of global demand.

The deposit sits near Minami Torishima, within Japan’s exclusive economic zone (EEZ), far from usual trade bottlenecks. Beyond economics, the revelation carries significant strategic implications. It could rewire supply chains and recalibrate regional power dynamics.

The research vessel Chikyu led the mission, retrieving sediment rich in rare earths from 6,000 meters below the surface.

Because the cache lies entirely within Japanese waters, Japan holds exclusive rights and faces a clearer regulatory pathway.

If early estimates hold, Japan could rank among the top three countries in rare earth reserves — a sharp pivot in its resource strategy and a rare degree of control at sea.

The estimated dysprosium deposit could last 730 years, while the yttrium reserves — vital for lasers — could supply global demand for 780 years.