China Expands Rare Earth and Export Restrictions on Japan Over Defense and Taiwan Tensions

The retaliatory measures follow remarks made in November by Japanese Prime Minister Sanae Takaichi, who stated in the National Diet that an attack on Taiwan could constitute an “existential threat” to Japan and justify a military response. Beijing viewed the statement as an explicit justification for Japanese military involvement in a Taiwan contingency, prompting a swift tightening of critical mineral supply chains that supply Japanese advanced manufacturing and defense sectors.

Scope of the Export Controls and Dual-Use Technologies

China’s latest export restrictions apply broadly to dual-use items capable of bolstering Japan’s military capabilities. The restricted categories encompass critical inputs such as rare earth elements, permanent magnets, gallium, germanium, graphite, and advanced manufacturing equipment.

While Beijing has frequently deployed critical mineral export controls as leverage in trade disputes with the United States—such as the 2025 limits on rare earths managed by China’s Ministry of Commerce (MOFCOM)—the campaign against Tokyo explicitly ties export policy to geopolitical disputes over Taiwan. Unlike trade-related quotas, these measures target specific institutions and manufacturers deemed vital to Japan’s defense industrial base.

Regional Friction and Military Posture in the East China Sea

The export restrictions did not materialize in a diplomatic vacuum. Tensions escalated sharply through November and December 2025, underscored by confrontations near disputed islands in the East China Sea and the Philippine Sea.

The most acute military incident occurred when Chinese J-15 fighter jets locked their radar onto Japanese aircraft near the Okinawa islands, an action interpreted as a direct threat. These maneuvers coincided with the People’s Liberation Army (PLA) completing “Justice Mission 2025” exercises—large-scale drills simulating the blockade and seizure of Taiwan that involved 130 aircraft, 14 naval ships, and 8 coast guard vessels between December 29 and December 30.

The drills followed an $11 billion U.S. weapons package sale to Taiwan, prompting joint calls for regional restraint from Japan, Australia, and the United Kingdom.

Economic Fallout and Industrial Supply Chain Vulnerabilities

The latest controls compound ongoing anxieties for global manufacturing and technology firms reliant on specialized materials. Although broader international trade discussions—such as the U.S.-China trade framework talks in London—have occasionally established temporary “green channels” or suspended non-tariff countermeasures, bilateral restrictions targeting specific national security partners remain volatile.

Licensing delays and sensitive data requirements continue to force firms worldwide to rethink sourcing strategies for rare earths and permanent magnets. With China maintaining dominant control over global refining capacity for heavy rare earth elements like dysprosium and terbium, targeted restrictions against key U.S. or Japanese allies highlight the persistent fragility of critical mineral supply chains.