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Home » Japan’s ultra-deep-sea quest to mine rare earths triggers a green backlash
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Japan’s ultra-deep-sea quest to mine rare earths triggers a green backlash

adminBy adminJuly 9, 2025No Comments1 Min Read
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Japan’s quest for rare earths is about to plunge to unprecedented depths in what could be the most extreme trial extraction ever attempted, accelerating a push to lessen its reliance on overseas suppliers – but at what environmental cost?

The Japan Agency for Marine-Earth Science and Technology plans to deploy a deep-sea drilling vessel to a site around 100km (54 nautical miles) from Minamitorishima, according to a report in the Nikkei newspaper dated July 1.

The remote atoll is some 1,850km (1,600 nautical miles) southeast of Tokyo and marks the easternmost tip of territory that Japan claims.

During the three-week operation, equipment will be lowered from the drilling ship Chikyu to around 5,500 metres (18,000 feet) to extract roughly 35 tonnes of seabed mud. While small samples have previously been collected from similar depths, the scale of this project is unprecedented, representing a step towards the commercial extraction and use of undersea minerals.

Japanese deep-sea drilling vessel Chikyu is seen anchored at a pier in Shizuoka prefecture. Photo: AFP
Japanese deep-sea drilling vessel Chikyu is seen anchored at a pier in Shizuoka prefecture. Photo: AFP

The recovered material will then be transported back to Japan, where it is hoped that each tonne of mud will yield an average of 2kg (4.4lbs) of rare earths.



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