China's rare-earth halt to Japan (2010)
After a collision between a Chinese fishing boat and Japanese coast guard vessels near the disputed Senkaku Islands, China slowed rare-earth exports to Japan. Those minerals are vital for electronics and auto manufacturing. Beijing denied a formal ban.
Japanese firms faced supply scares and price spikes for months.
Japan diversified suppliers, stockpiled materials, and joined a WTO case that China lost in 2014.
Beijing is again using control over critical goods to apply pressure over a security dispute. The 2010 episode shows Japan can adapt, and that the WTO can rule against China.
