Shin-Etsu Chemical is building a new rare-earth magnet refinery in Fukui prefecture, Japan, its first such facility in nearly two decades. The investment totals at least 35 billion yen, roughly $218 million, with the Japanese government picking up half the tab through a 17.5 billion yen subsidy.

What Shin-Etsu is actually building

The new refinery will focus on heavy rare earth elements, specifically dysprosium, terbium, and yttrium. These aren’t household names, but they’re the ingredients that make neodymium-based magnets work, the kind found in EV motors, wind turbines, and advanced electronics.

Shin-Etsu currently operates Japan’s only large-scale rare-earth separation and refining plant. The company has been working with rare earth materials since 1961.

The new Fukui facility marks the first time Shin-Etsu has built a new refinery since 2008.

Japan’s broader supply chain strategy

Japan managed to reduce its Chinese rare earth imports from approximately 90% to under 60% by 2020.

In October 2025, the US and Japan established a formal supply chain collaboration framework, signaling that both countries view rare earth diversification as a national security priority.

The Japanese government’s willingness to subsidize half of Shin-Etsu’s investment, 17.5 billion yen, underscores how seriously Tokyo is taking the issue.

What this means for investors

The geopolitical dimension adds a layer of volatility that traders should factor into their models. China has previously weaponized rare earth exports as a diplomatic tool, most notably during its 2010 dispute with Japan over the Senkaku Islands.

The risk for Shin-Etsu is execution. Building processing capacity is capital-intensive and technically demanding. The 18-year gap since their last new facility means construction and commissioning timelines could face unexpected hurdles. And even with government subsidies covering half the cost, the company still needs the refinery to be economically viable long-term.