A Japanese deep-sea drilling vessel has recovered sediment containing rare earth elements from nearly 6,000 meters below the Pacific Ocean near Minamitorishima, a remote island south of Tokyo. The material was brought up by the research vessel Chikyu, and Japanese officials described the test retrieval as the first of its kind at that depth.

The recovery took place after Chikyu sailed in January for waters around Minami Torishima, also referred to in some reporting as Minamitorishima, an island inside Japan’s exclusive economic zone. Photos distributed through the Associated Press showed mining equipment lowered to the seabed on January 18, inserted into subsea sediment on January 30, and rare earth-rich mud placed into bottles on February 1.

Prime Minister Sanae Takaichi said the vessel had gathered the sediment at a depth of nearly 6,000 meters, or about 19,700 feet, and called the test retrieval “a world first.” She also said the operation was “a first step toward industrialization of domestically produced rare earth in Japan” and linked it to the goal of building “resilient supply chains” for rare earths and other critical minerals so Japan can avoid overdependence on a single country.

The Site Has Been on Japan’s Radar for Years

The sample recovery did not come out of nowhere. Japanese researchers had already identified rare earth-rich mud in waters near Minamitorishima during surveys in the 2010s, and the area within Japan’s exclusive economic zone has been estimated to contain more than 16 million tonnes of rare earth deposits. Al Jazeera, citing Nikkei, said that would make it the third-largest reserve globally. Indian Defence Review repeated the same reserve estimate, also tying it to earlier Japanese surveys.

That larger reserve estimate is one reason the operation drew attention beyond Japan. Rare earth elements are used in high-performance magnets and other components that feed industries such as defense and electric vehicles, and AP noted that China controls most global production of heavy rare earths.

What Officials Say Has Been Confirmed, and What Has Not

Japanese officials have been careful about what is confirmed at this stage. Government spokesman Kei Sato said the recovered sample was being analyzed for the quantity of rare earth contained in the sediment. Science and Technology Minister Yohei Matsumoto announced that “rare earth mud” had been collected by Chikyu, but the exact amount and composition still need analysis. AP likewise reported that details, including the amount of rare earth in the recovered material, still need to be analyzed.

Deputy Chief Cabinet Secretary Masanao Ozaki called the successful retrieval “a meaningful achievement from the perspectives of economic security and comprehensive ocean development.” Al Jazeera separately reported the same line of argument through Kei Sato, who described the retrieval as meaningful for economic security and maritime development.

That means the confirmed event is the recovery of sediment containing rare earth elements from extreme depth. It does not yet mean Japan has proved large-scale extraction is practical, profitable, or ready to enter commercial production.

Why Japan Is Pushing This Now

The story is also about supply risk. Al Jazeera reported that Japan signed an agreement with the United States late last year to coordinate on securing rare earth supplies, with both countries focused on China’s control over much of the critical minerals trade. The same report said Japan imports roughly 70 percent of its rare earths from China, citing Yomiuri Shimbun.

Al Jazeera added that Japanese concern intensified after Beijing blocked exports of “dual-use” items with potential military uses following tensions linked to Takaichi’s remarks about Taiwan. That broader geopolitical context helps explain why Japanese officials framed the retrieval as an economic security issue rather than just a scientific exercise.

The Next Hurdle Is Industrialization, Not Discovery

The move from sample recovery to mining is still unresolved. AP reported that industrialization would require proving the full process from mining through separation and refining, and then verifying whether the economics work. Indian Defence Review, despite using the most dramatic headline of the three sources, also said the sample retrieval does not amount to commercial production and that no timeline for commercial mining has been announced.

That is the key boundary in the reporting. The AP and Al Jazeera pieces support the claim that Japan has successfully recovered rare earth-bearing sediment from nearly 6,000 meters below the seabed near Minamitorishima and sees it as part of a strategy to reduce reliance on China. The more expansive “700 years” framing comes from the Indian Defence Review headline, but the article itself still acknowledges that the material is being analyzed and that commercial mining has not begun.