Highlights

• China has significantly tightened its rare earth export review process for Japan, now requiring detailed disclosures on buyers, end-use, transportation routes, and re-export destinations, marking a shift to transaction-level oversight.
• Chinese state-owned suppliers have informed Japanese firms they will not sign new contracts and may terminate existing ones—the first confirmed instance of outright denial of rare earth purchases to Japanese companies.
• Despite diversification efforts, Japan remains 71.9% dependent on Chinese rare earth imports, with potential disruptions estimated to cost up to ¥2.6 trillion (~$17 billion) annually, while Japan accelerates deep-sea mining alternatives.

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According to Japanese media reports China has significantly tightened its review process for rare earth and rare metal exports to Japan, requiring Japanese companies to submit far more detailed documentation than before. Multiple trade sources told outlets, including Japan Today and Kyodo News, that the new requirements could slow shipments of materials critical to electric vehicles, semiconductors, and advanced manufacturing.

Under the revised review process, Chinese authorities are now demanding comprehensive disclosures covering the qualifications of Japanese buyers, the end-use of the rare earths, transportation routes, downstream customers, intermediaries, and—most notably—whether products made with these materials will be re-exported to third countries. For U.S. and Western observers, this marks a shift from quantity-based export controls to granular, transaction-level oversight, significantly increasing Beijing’s leverage over downstream supply chains.

The move follows earlier Chinese actions. On January 6, China’s Ministry of Commerce announced tighter export controls on certain dual-use items involving Japan, citing national security concerns. Chinese media further claim the latest measures were triggered by comments from Japanese Prime Minister Sanae Takaichi on Taiwan in late 2025—underscoring how geopolitical signaling is now directly influencing critical mineral trade.

More consequentially, Kyodo News reported that Chinese state-owned rare earth suppliers have informed some Japanese firms they will not sign new contracts, and are even considering terminating existing ones. Japanese media describe this as the first confirmed instance of Japanese companies being denied rare earth purchases outright.

What About Japanese Diversification?

Despite Japan’s diversification efforts since 2010, official data show that 71.9% of Japan’s rare earth imports still came from China in 2024, with near-total dependence for certain heavy rare earths used in permanent magnets for EV and hybrid motors. Nomura Research Institute estimatesthat a three-month disruption could cost Japan ¥660 billion ($4.4 billion) and shave 0.11% off GDP; a year-long disruption could push losses to ¥2.6 trillion ($17 billion). Not good scenarios for the Japanese economy.

In response, Japan is accelerating alternatives. The deep-sea drilling vessel Chikyu has begun test drilling near Minami-Torishima Island to evaluate rare–earth–rich seabed muds, as cited by the Australian Broadcasting Corporation (opens in a new tab).  Project leaders say commercial production could begin as early as February 2027 if tests succeed.

China’s Foreign Ministry defended the measures as lawful and necessary for national security, while stating it remains committed to global supply chain stability.

Why this matters for the U.S. and the West

This episode highlights how China’s dominance in rare earth processing can now be exercised through administrative controls, not just quotas, reinforcing supply chain vulnerability for allies—and underscoring the urgency of Western investment in non-Chinese refining and processing capacity.