Can Japan’s industrial rare earth policy move faster than China’s export licensing system?
Reuters reported that Japanese corporate filings are increasingly citing rare earth supply risks as China continues to restrict shipments of key materials to Japan. The warnings include companies such as Citizen Watch and Omron, which have flagged possible pressure on production and profitability while reporting limited immediate impact.
The International Energy Agency said China accounts for around 60% of global mined production of magnet rare earths, more than 90% of refining, and almost 95% of permanent magnet production. That makes Japan’s exposure less like a raw-material shortage and more like a midstream dependency trap.
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China tightened controls on dual-use exports to Japan in January 2026, including rare earth-related materials and products that can have military applications. The restrictions followed a deterioration in China-Japan relations tied to Taiwan and security policy, with Reuters reporting that shipments of heavy rare earths such as dysprosium, terbium, and yttrium to Japan remained under pressure months later.
The vulnerability is concentrated in small-volume, high-value inputs. Heavy rare earths such as dysprosium and terbium are used to preserve magnet performance under heat, making them important for electric vehicles, robotics, aerospace, defense systems, and precision electronics. S&P Global reported that the bottleneck is especially acute in processing, refining, and qualification, rather than just in ore supply.
Japan is one of the few countries outside China with meaningful rare earth permanent magnet capability. A Japanese embassy official cited by S&P Global estimated Japan’s share of advanced rare earth permanent magnet and alloy manufacturing at about 15%, second only to China.
If Japanese magnet supply tightens, the impact can move downstream into automakers, electronics makers, and industrial equipment suppliers.
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Japan has been here before. After a 2010 rare earth shock, Tokyo invested in diversification, including support for Lynas Rare Earths and supply chain development outside China. CSIS noted that Japan has made progress in refining, recycling, and overseas sourcing, but said claims that Japan has fully de-risked from China are “misguided.” In 2024, Japan still imported more than 5.2 million kilograms of rare earth metals from China, equal to 63% of its rare earth metal imports, according to CSIS citing trade data.
According to the agency estimates, if such controls by China were fully implemented, up to $6.5 trillion of annual economic activity outside China could be at risk, with automotive, electronics, and other transport sectors heavily exposed.
For Japan, the question is whether corporate warnings remain manageable disclosure language or become guidance revisions, production delays, and margin pressure. The first stage is risk-factor language. The second is inventory drawdown. The third is missed output.
Latest reporting suggests Japan is moving from stage one toward the uncomfortable middle.
The response is accelerating, but not instantly. Shin-Etsu Chemical, a major rare earth magnet maker, plans to build a new rare earth refining facility in Fukui prefecture, Reuters reported, a first such refining facility since 2008. A company spokesperson confirmed the project would receive a ¥17.5 billion government subsidy, while Nikkei reported the total investment could reach at least ¥35 billion, or about $218 million.
The lag gives China a durable advantage. The Financial Times reported that China’s controls, especially around yttrium oxide, are raising costs for Japanese firms while creating opportunities for Chinese manufacturers to move further into higher-value parts of the supply chain. The reported price gap is severe, with yttrium oxide at $7.88 per kilogram in China and $1,175 per kilogram in Europe.
Japan’s rare earth strategy is therefore no longer only about national security but whether manufacturers can keep the economics of precision production intact while paying a resilience premium. The deeper risk is that the longer China keeps the supply chain tight, the more Japanese companies have to choose between absorbing higher costs, redesigning supply chains, delaying production, or helping fund an expensive non-China ecosystem that may arrive late.
