China Blocks Rare Earth Shipments to Japan Over Taiwan Defense

The Government of China has blocked the shipment of critical rare earth minerals, including terbium, dysprosium, and yttrium oxide, to Japan. This diplomatic retaliation stems from comments made in November by Japanese Prime Minister Sanae Takaichi regarding the defense of Taiwan, which Beijing viewed as an interference in its internal affairs.

The supply disruption is creating systemic pressure across the Japanese economy. According to corporate filings submitted to the Tokyo Stock Exchange, rare-earth-related risk warnings from Japanese firms have doubled since May. High-precision manufacturers are particularly vulnerable; for instance, Citizen Watch warned in a June 23 filing that prolonged export restrictions could disrupt production activities, while medical device manufacturer Omron cited the controls in its geopolitical risk assessment. Despite these warnings, some firms report that the restrictions have not yet caused an immediate drop in quarterly earnings.

In response, the Government of Japan is deploying subsidies and investments to secure alternative mineral sources and is accelerating research into rare-earth recycling. To stabilize its supply chain, Prime Minister Takaichi signed a coordination framework with U.S. President Donald Trump to establish joint stockpiling and rapid-response arrangements. While Japan is also coordinating stockpiles with other G7 nations, analysts note that commercial-scale alternatives, such as harvesting deep-sea deposits, remain several years away from viability.