China's threat to restrict rare-earth magnet exports, crucial for technologies like EVs and wind turbines, may be less effective against Japan. Following a 2010 threat, Japan diversified its supply chains and built stockpiles, making it resilient. While China dominates neodymium magnet production, Japan is a major manufacturer of the remainder. Previous Chinese export restrictions impacted European and Indian manufacturers, but Japan's preparedness suggests it may withstand such measures.