China's latest customs data confirms it is sustaining a targeted squeeze on Japan's supply of critical minerals.
This situation didn't happen overnight; it's a calculated move rooted in geopolitics. The primary cause traces back to late 2025, when diplomatic tensions flared between China and Japan over Taiwan. In January 2026, Beijing responded by banning the export of dual-use items to Japan, citing national security. This ban provided the legal framework for what we see today: a halt in shipments of specific, high-value materials crucial for Japan's advanced industries.
Secondly, China's strategy is highly selective. It's not a blanket embargo on all rare earths. Instead, Beijing is targeting materials where Japan is most vulnerable, such as heavy rare earths (HREEs) like dysprosium (Dy) and terbium (Tb), and certain forms of tungsten. These are essential for high-performance magnets used in everything from electric vehicles to defense systems. By restricting the raw materials while allowing some finished products like magnets to flow, China maximizes its leverage on Japan's industrial supply chain.
Finally, this isn't the first time this has happened. The memory of the 2010 rare earth crisis prompted Japan to diversify its sources. Efforts included funding alternative producers like Australia's Lynas, which now separates HREEs outside of China, and boosting domestic recycling. While these measures provide a buffer, Japan's dependence on China for certain key minerals remains significant. In response to the latest pressure, G7 nations have formed a critical minerals alliance, aiming to collectively reduce their reliance on any single supplier to below 60% by 2030, turning this bilateral issue into a matter of collective economic security.
- Glossary:
- Heavy Rare Earths (HREEs): A subgroup of rare earth elements, including dysprosium and terbium, that are less common and more expensive. They are critical for applications requiring high strength and heat resistance, like permanent magnets.
- Dual-use items: Goods, software, and technology that can be used for both civilian and military purposes. Exporting them is often tightly controlled.
- Tungsten APT: Ammonium Paratungstate, an intermediate product in the process of refining tungsten ore into pure metal. It is a key benchmark for tungsten prices.