China Heavy Rare Earth Exports Stall as Curbs Hit Japan and US

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China heavy rare earth exports stalled in May as export restrictions continued to disrupt shipments of terbium, dysprosium and lutetium products to key buyers. The data show how Beijing’s licensing controls are reshaping trade flows for materials used in magnets, defence, aerospace and advanced manufacturing.

China heavy rare earth exports were especially weak for products exposed to US and Japanese demand. China recorded no May exports of terbium oxide, dysprosium metal and several other key heavy rare earth products, while yttrium oxide shipments fell sharply from April.

China heavy rare earth exports are now being driven less by normal spot demand and more by policy clearance, end-use approval and bilateral tensions. This makes supply planning increasingly difficult for downstream users that need small but critical volumes.

Light rare earth exports moved in the opposite direction. Shipments of cerium oxide, lanthanum carbonate and neodymium metal increased in May as stronger downstream demand and firmer export prices encouraged buyers to purchase more material.

Heavy Rare Earth Controls Tighten Supply to Japan

Japan has been the clearest casualty of China’s heavy rare earth restrictions. It was previously a major consumer of Chinese yttrium oxide, accounting for 57-60% of total shipments.

That flow has changed sharply since January, when Beijing banned exports of dual-use items for Japanese military use or any end-use that could enhance Japan’s military capabilities. The measure followed deteriorating relations after comments on Taiwan by Japanese prime minister Sanae Takaichi.

China exported only 7t of yttrium oxide to Japan in May, while total May yttrium oxide exports fell to 90t from 161t in April. Germany received 55t, France 14t, Russia 6.9t and South Korea 6.2t.

For January-May, China exported 454t of yttrium oxide. South Korea received 111t, Austria 100t, the US 80t, Germany 69t, Vietnam 40t, Russia 20t and Japan only 14t.

Dysprosium flows were also tightly controlled. China exported 8.4t of dysprosium oxide in May, up slightly from April and March, but all shipments in April-May went to South Korea.

Dysprosium metal exports stopped in May after 3t moved to South Korea in April. Exports to Japan have been suspended since January, after 2t was shipped in December 2025.

Terbium exports were even more constrained. China exported no terbium oxide in May after shipping only 0.2t in April. Total January-May exports reached 5.7t, mostly to South Korea.

Terbium metal exports were almost absent in May, while shipments to Japan have been suspended since January. Lutetium oxide exports were also almost absent after 5t moved to the US in April.

Magnet and Aerospace Users Face Licensing Risk

The latest export pattern matters because heavy rare earths are small-volume materials with large strategic importance. Dysprosium and terbium are used to improve high-temperature performance in rare earth permanent magnets.

Those magnets are critical for electric vehicles, wind turbines, robotics, aerospace systems, defence equipment and high-performance industrial motors. Yttrium is also important for ceramics, phosphors, alloys, coatings and aerospace-related applications.

Lutetium is a smaller market, but its supply risk is strategically relevant because many specialty rare earths have few alternative sources. Even small interruptions can affect qualified users because substitution is difficult.

The May data show that South Korea has remained a permitted destination for some heavy rare earth products, especially dysprosium oxide. This could reflect licensing approvals for civilian or qualified end uses.

But the broader message is that buyers cannot rely only on market availability. They must also track export licences, end-user reviews and political relations with Beijing.

The divergence between light and heavy rare earth exports is also important. Light rare earth demand can still rise when prices and downstream consumption support trade, while heavy rare earth flows remain vulnerable to strategic controls.

For non-China supply chains, this reinforces the need for separation, metallization, magnet recycling and heavy rare earth sourcing outside China. However, building that capacity will take time, capital and customer qualification.

Japan’s exposure is especially important because the country has deep magnet, electronics, automotive and precision manufacturing industries. Reduced access to yttrium, dysprosium, terbium and lutetium could force buyers to accelerate inventory strategies and non-China sourcing.

The market should therefore treat May’s export data as more than a trade statistic. It is another signal that heavy rare earth supply is becoming a managed geopolitical channel.

The Metalnomist Commentary

China’s May export data show that rare earth risk is now concentrated in licensing, not only price. For Japan, the US and other advanced manufacturing economies, heavy rare earth security will depend on building supply routes that can survive political friction.