Japan Seeks US Help on China Yttrium Curbs as Metal Runs Out

Japan asked the United States on Oct. 20, 2026, to help convince Beijing to ease critical mineral export controls as domestic industrial stockpiles of yttrium dropped toward exhaustion.

The diplomatic request followed months of trade friction that halted shipments of yttrium oxide, a rare earth element used to stabilize ceramic electronics and protect jet engine turbine blades.

China exported 14.1 tonnes of yttrium oxide to Japan between January and May 2026. That volume represents a 97.7% decline from the 605.3 tonnes cleared during the same period in 2025, Chinese customs data show.

The bilateral supply collapse triggered severe market distortions. Data from commodity pricing agency Argus show yttrium oxide traded at about $1,150 per kilogram outside China, up 179-fold over two years, while Chinese domestic prices held at roughly $9 per kilogram.

Tokyo made direct entreaties to US officials and American multinational companies to seek relief, according to people familiar with the matter. Japanese stockpiles have fallen to levels that leave downstream manufacturers with only months of operating reserves.

Yttrium serves as a critical structural input across precision manufacturing. In electronics, the mineral functions as an essential additive in multilayer ceramic capacitors (MLCCs) — miniature passive components that regulate electrical current across circuit boards.

Murata Manufacturing commands approximately 40% of the global MLCC market. The supplier requires steady volumes of high-purity yttrium oxide to preserve electrical capacitance and prevent dielectric breakdown under thermal stress.

Component maker TDK Corporation holds roughly 13% of worldwide MLCC output. The company relies on specialized yttrium formulations to maintain ceramic stability in automotive electronic control units and power modules.

The mineral also protects semiconductor manufacturing tools from chemical degradation. Plasma etch tools employ protective yttria coatings inside vacuum chambers to withstand aggressive halogen gases during wafer processing.

Japan's precision materials fabricators supply these coated chamber liners to Tokyo Electron, which accounts for about 25% of the worldwide semiconductor dry-etch equipment market. A prolonged raw material freeze risks delaying equipment assembly schedules.

Export restrictions expanded under administrative actions published in Beijing over the past two years. China's Ministry of Commerce (MOFCOM) and the General Administration of Customs issued Announcement No. 18 on April 4, 2025.

The measure instituted mandatory export licenses for seven medium and heavy rare earth elements, specifically naming yttrium, samarium, gadolinium, terbium, dysprosium, lutetium and scandium.

Beijing tightened export enforcement on Jan. 6, 2026, barring dual-use items destined for Japanese military end-users or applications capable of enhancing defense capabilities.

Chinese regulators deepened the restrictions on Feb. 24, 2026, placing 20 Japanese aerospace and defense entities on a restricted trade list.

The action halted mineral licensing for Mitsubishi Heavy Industries Aero Engines, which produces combustor and turbine assemblies for commercial and allied military aircraft.

The order also targeted aerospace divisions of IHI Corporation, which supplies critical fan and compressor modules across international defense supply chains.

Both defense contractors use yttrium as a thermal barrier coating to prevent turbine blades from melting under extreme combustion temperatures.

Without access to fresh Chinese feedstock, Japanese processing facilities have operated by depleting strategic buffer stocks established after previous diplomatic disputes.

Senior Japanese officials warned that technical efforts to thrift or substitute the element have reached engineering limits, leaving manufacturers facing production cutoffs by early 2027.

Japan's Ministry of Economy, Trade and Industry has not published the remaining days of domestic yttrium reserves, keeping national stockpile tallies and company inventory totals classified.

The ministry and the US Treasury Department declined to comment on the bilateral diplomatic discussions, and Beijing has not confirmed any licensing concessions.

Allied manufacturers face a rigid calendar checkpoint. China's temporary suspension of dual-use curbs under Announcement No. 70 of 2025 is scheduled to expire on Nov. 10, 2026.

That suspension never included the April 2025 licensing requirements for heavy rare earths, leaving yttrium shipments subject to case-by-case clearance by Chinese security authorities.