Japan has begun a five-week experiment to extract rare earth minerals from the deep seabed off Minamitorishima Island, aiming to reduce reliance on China for critical materials. The project, aboard the research vessel Chikyu, marks the first prolonged collection effort at such depths and highlights tensions between energy security and environmental risks. Officials hope it will support Japan's carbon neutrality goals by 2050 while bolstering industrial competitiveness.
The initiative stems from a 2010 maritime incident near the Senkaku Islands, where a Chinese fishing trawler rammed Japanese patrol boats, leading to the arrest of captain Zhan Qixiong. China responded by halting exports of rare earth elements, on which Japan depended for 90 percent of its supply, disrupting industries like automotive and electronics production. This event, described by Takahiro Kamisuna of the International Institute for Strategic Studies as 'the turning point,' prompted Japan to diversify its sources of critical minerals.
Fifteen years on, China still supplies 60 percent of Japan's needs, a vulnerability exacerbated by geopolitical strains. Last month, Japan initiated the test off the uninhabited Minamitorishima Island, 1,180 miles southeast of Tokyo. A team of 130 researchers on the Chikyu vessel deploys a robotic system to vacuum mud from 6,000 meters deep, targeting rare earths like neodymium and yttrium essential for electric vehicles, solar panels, and defense technologies. The operation, led by the Japan Agency for Marine Earth Science and Technology, is set to conclude on February 14 and follows a recent U.S.-Japan agreement on mineral supply cooperation.
Prime Minister Sanae Takaichi, who took office late last year, views the effort as vital for national security and economic stability, even as she questions subsidies for Chinese-imported green technologies. Jane Nakano of the Center for Strategic and International Studies notes that energy security and decarbonization are intertwined challenges facing G7 nations, with Japan aligning its approach to maintain competitiveness.
Environmentalists raise alarms over potential damage from sediment plumes, noise, and habitat disruption in the fragile deep-sea ecosystem, home to species like sea cucumbers and corals. Marine biologist Travis Washburn warns that extraction could destroy affected areas for decades. Shigeru Tanaka of the Pacific Asia Resource Center criticizes the project for overlooking irreversible risks and international law. Officials plan close monitoring, with success potentially leading to a 2027 trial involving polymetallic nodules and hybrid mining techniques. Refining the minerals, however, demands significant energy, posing further environmental questions.
