Shin-Etsu lifts Japan’s rare-earth defences

Shin-Etsu Chemical plans to build a new rare-earth refining facility in Fukui Prefecture as Japan accelerates efforts to protect critical mineral supply chains from disruption caused by China’s export controls.

The project marks the company’s first new rare-earth refining facility since 2008 and comes as demand for high-performance magnets rises across electric vehicles, hard disk drives, robotics, wind power systems, defence equipment and advanced electronics. The investment is expected to exceed ¥35 billion, with ¥17.5 billion to be covered by government subsidy support, although the final cost and production schedule have not yet been fixed.

The new facility is intended to reinforce supplies for Shin-Etsu’s rare-earth magnet business and strengthen access to raw materials used in neodymium-based magnets. Heavy rare earths such as dysprosium, terbium and yttrium are particularly important because they improve magnet performance in high-temperature and high-stress applications, including vehicle motors and precision industrial systems.

Shin-Etsu already operates rare-earth refining facilities in Japan and has long been one of the country’s most important producers in the sector. Its rare-earth operations are centred in Fukui Prefecture, where it smelts materials and manufactures magnets at its plant in Echizen. The company says it works from raw materials through production to provide stable quality and supply, while also pursuing recycling and resource diversification.

The planned expansion reflects a broader shift in Japan’s industrial policy after months of tightening access to critical minerals. Chinese shipments of several heavy rare earths and gallium to Japan have been severely restricted since late 2025, heightening concerns among manufacturers that depend on these materials for magnets, semiconductors and other precision components. China continues to dominate mining, separation and refining capacity across the rare-earth value chain, giving Beijing considerable leverage over downstream industries.

Japan remains the largest rare-earth magnet producer outside China, but its manufacturers are still exposed to bottlenecks in the supply of heavy rare earths. The country has built stockpiles, backed overseas projects and encouraged recycling since the 2010 rare-earth shock, when diplomatic tensions with China exposed the risk of overdependence on one supplier. Those measures have improved resilience, but they have not removed the vulnerability.

The latest project is significant because it targets refining and processing rather than simply raw-material procurement. Mining deposits alone do not solve the supply challenge; rare earths require complex separation, purification and alloy processing before they can be turned into magnets. China’s advantage lies not only in reserves but also in decades of accumulated processing capacity, cost efficiency and industrial integration.

Shin-Etsu’s move also fits into a wider network of partnerships being pursued by Japan with Australia, France and the United States. Tokyo has backed alternative producers, supported offtake arrangements and encouraged private-sector investment in midstream processing. Australia-based Lynas has become a key non-China supplier, but output of heavy rare earths remains far below the volumes needed to replace Chinese supply in full.

The pressure is not limited to Japan. Manufacturers in the United States and Europe have faced similar supply uncertainty as export licensing delays affect rare earths used in aerospace, defence, clean energy and electronics. Companies exposed to the restrictions are searching for alternative suppliers, but industry executives warn that rebuilding a fully independent supply chain will take years.

For Shin-Etsu, the business case rests on both security and demand. Permanent magnets are central to electrification and digital infrastructure. Electric vehicles require compact, powerful motors; data centres and hard disk drives depend on precision magnetic components; wind turbines need high-strength magnets to improve efficiency. Demand growth has made the magnet supply chain a strategic concern for governments as well as manufacturers.

The company’s project is unlikely to eliminate Japan’s reliance on imported feedstock, especially for heavy rare earths where global non-China supply remains thin. It could, however, give domestic manufacturers greater control over processing, quality assurance and emergency production planning. That matters for customers in sectors where delivery delays can disrupt production lines and where material specifications are tightly controlled.

The government subsidy underscores how rare earths have moved from a specialist materials issue to a national industrial priority. Public support reduces the financial burden on companies undertaking technically demanding projects with long payback periods. It also signals that Tokyo is prepared to use industrial policy to keep strategic capabilities onshore.