Japan has successfully recovered rare earth–rich sediment from a depth of about 6,000 metres in the Pacific Ocean, marking a major step in its effort to secure critical mineral supplies and reduce dependence on China.
The test mission was carried out by the drilling vessel Chikyu near Minami-Torishima, a remote island within Japan’s exclusive economic zone. Officials said the recovered samples will now be analyzed to determine their mineral content and commercial potential.
The operation is believed to be the world’s first attempt to access rare earth resources at this depth. It is part of Japan’s broader strategy to strengthen economic security and protect key industrial supply chains.
Rare earth elements are essential for electric vehicles, renewable energy systems, electronics, and defence technologies. China currently dominates global production and refining, creating long-standing supply risks for importing countries.
According to the International Energy Agency, China controls most of the world’s refined rare earth output, giving it significant geopolitical leverage.
Surveys suggest the seabed around Minami-Torishima may contain more than 16 million tonnes of rare earth–bearing sediment, potentially representing one of the largest untapped reserves globally.
However, commercial development remains uncertain. Mining at 6,000 metres involves major technical, financial, and environmental challenges. Further testing and environmental assessments will be required before any large-scale operation can proceed.
If proven viable, the project could become a cornerstone of Japan’s long-term critical minerals strategy and reduce its exposure to foreign supply disruptions.
