A Japanese research vessel yesterday began a historic voyage to attempt to dig deep-sea rare earths at a depth of 6,000m to curb dependence on China.
Scientific drilling boat the Chikyu left Shimizu Port in Shizuoka at about 9am for the remote island of Minami Torishima in the Pacific, where surrounding waters are believed to contain a rich trove of valuable minerals.
The test cruise comes as China — by far the world’s biggest supplier of rare earths — ramps up pressure on its neighbor after Japanese Prime Minister Sanae Takaichi suggested in November that Tokyo could react militarily to an attack on Taiwan.
Photo: Reuters
China has long used its dominance in rare earths for geopolitical leverage, including in its trade war with US President Donald Trump’s administration.
Chikyu’s voyage, delayed by one day due to bad weather, could lead to domestic production of rare earths, said Shoichi Ishii, program director at the Cabinet Office.
“We are considering diversifying our procurement sources and avoiding excessive reliance on specific countries,” he told reporters at the port as the ship prepared to leave.
“One approach I believe could be pursued is establishing a process to achieve domestic production of rare earths,” he said.
Rare earths — 17 metals difficult to extract from the Earth’s crust — are used in everything from electric vehicles to hard drives, wind turbines and missiles.
The Japan Agency for Marine-Earth Science and Technology has touted the test as the world’s first at such depths.
The area around Minami Torishima, which is in Japan’s economic waters, is estimated to contain more than 16 million tonnes of rare earths, which the Nikkei business daily says is the third-largest reserve globally.
These rich deposits contain an estimated 730 years’ worth of dysprosium, used in high-strength magnets in phones and electric cars, and 780 years’ worth of yttrium, used in lasers, Nikkei said.
“If Japan could successfully extract rare earths around Minami Torishima constantly, it will secure domestic supply chain for key industries,” said Takahiro Kamisuna, research associate at the International Institute for Strategic Studies.
“Likewise, it will be a key strategic asset for Takaichi’s government to significantly reduce the supply chain dependence on China,” Kamisuna said.
The cruise is scheduled to last until Feb. 14.
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