China Rare Earth Export Curbs Tighten Pressure on Japan’s Critical Minerals Supply

China, Rare Earth

China rare earth export curbs targeting Japan have intensified after Beijing added another 20 Japanese companies to its export ban list and placed 20 more on a stricter watch list. The measures deepen restrictions across rare earths, tungsten, antimony, gallium, germanium, graphite and other strategic materials classified as dual-use products.

China rare earth export curbs now affect 40 Japanese companies on the outright ban list and another 40 under enhanced licensing scrutiny. Chinese exporters cannot supply dual-use materials to banned entities, while transactions involving watch-listed companies require individual licences, risk assessments and detailed end-use commitments.

China rare earth export curbs are already reshaping physical trade. Shipments of heavy rare earths and several critical metals to Japan have collapsed or stopped entirely since bilateral relations deteriorated in late 2025.

The restrictions expose Japan’s dependence on Chinese processing capacity across sectors including permanent magnets, semiconductors, aerospace, defence, nuclear technology and advanced manufacturing.

Heavy Rare Earth and Tungsten Flows Collapse

Heavy rare earth supply has experienced some of the sharpest disruption. China exported only 14t of yttrium oxide to Japan during January-May, down from 605t a year earlier.

Japan previously accounted for around 57-60% of China’s yttrium oxide exports, showing how rapidly geopolitical controls can dismantle established trade flows.

Exports of dysprosium oxide to Japan have been suspended since November 2025. Dysprosium metal and terbium metal shipments stopped in January, while terbium oxide exports have been halted since December.

These materials are strategically important for high-performance NdFeB permanent magnets. Dysprosium and terbium improve magnet performance at elevated temperatures, making them critical for electric motors, aerospace systems and defence applications.

Rare earth magnet shipments are also weakening. Chinese exports to Japan fell to 123t in May from 188t in April and a record 304t in November 2025.

Tungsten trade has deteriorated similarly. China has shipped no ammonium paratungstate to Japan since January, while tungsten trioxide exports were zero during January-May.

Tungsten carbide shipments fell to only 14t during the first five months of the year, compared with 628t during all of 2025. Tungsten powder exports dropped to 10t from 131t last year.

Antimony flows have effectively disappeared as well. China exported no antimony materials to Japan during January-May after supplying 100t of antimony metal and 80t of antimony oxides in 2025.

Japan Faces Accelerating Supply Chain Diversification Pressure

The new controls expand the challenge beyond individual commodities. Japanese manufacturers must now manage stricter licensing, end-user verification and greater uncertainty around whether strategic materials can be supplied at all.

Gallium shipments illustrate this uncertainty. China resumed exports of 6,000kg to Japan in May after sending nothing during January-April, but strict inspections and lengthy approvals remain in place.

Graphite exports have also weakened. Flake graphite shipments fell by 16% during January-May, while artificial graphite exports to Japan declined by 19% year on year in May.

The broader impact reaches batteries, semiconductors, permanent magnets, machine tools and defence manufacturing. Japan may need to accelerate stockpiling, recycling, substitution and investment in alternative processing capacity.

The restrictions also strengthen the strategic value of rare earth projects in Australia, the US and other allied markets. Japanese companies will increasingly need long-term access not only to mined resources but also to separation, refining, metal and alloy capacity outside China.

Japan already possesses significant manufacturing expertise in magnets and advanced materials, but its vulnerability lies further upstream where China maintains dominant processing capacity.

The current dispute therefore demonstrates how export controls can weaponise midstream processing rather than resource ownership alone.

The Metalnomist Commentary

China is showing that control over processing can be more powerful than control over mines. Japan’s response will require accelerated investment in heavy rare earth separation, tungsten processing, recycling and strategic inventories rather than simple supplier diversification.