China Tightens the Heavy Rare Earth Valve-Japan Feels the Pressure Again

Highlights

• China has effectively halted exports of critical heavy rare earths (dysprosium, terbium, gallium, yttrium) to Japan for several months amid Taiwan-related geopolitical tensions, echoing the 2010 rare earth crisis.
• Despite Japan's post-2010 diversification efforts (including Lynas support and strategic stockpiles), the scale gap remains stark: Lynas produced 8 tonnes of dysprosium/terbium in Q1 2026 versus China's 14 tonnes monthly exports to Japan in 2024.
• China's dominance in industrial-scale separation, refining, and magnet manufacturing gives it decisive leverage in Great Powers Era 2.0, with companies like Shin-Etsu halting new orders for dysprosium magnets.

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_History may not repeat in rare earths, but it certainly rhymes. New reports suggest China has effectively halted exports to Japan of several critical heavy rare earth materials—including dysprosium, terbium, gallium, and certain yttrium compounds—for several months amid escalating geopolitical tensions linked to Taiwan. The development immediately recalls Beijing’s 2010 rare earth squeeze against Tokyo, a moment that permanently altered how governments viewed critical minerals and industrial vulnerability. This time, however, the industrial stakes may be even higher._

Reuters and a few other media tracked (opens in a new tab) today.

The Metals Quietly Powering Modern Industry

Heavy rare earths are not obscure niche materials. Dysprosium and terbium help permanent magnets withstand extreme temperatures inside EV motors, robotics, drones, missiles, wind turbines, and advanced aerospace systems. Gallium remains critical for semiconductors, radar systems, and high-frequency electronics. Reuters reports Shin-Etsu Chemical Co., Ltd. has reportedly stopped accepting new orders for certain dysprosium-containing magnets. Meanwhile, Ryosei Akazawa is visiting China as supply concerns intensify.

The Diversification Gap Remains Enormous

To Japan’s credit, the country learned important lessons from 2010. Japan built strategic stockpiles, reduced heavy rare earth intensity in magnets, and supported alternative supply chains including Lynas Rare Earths Ltd., which became the first commercial producer outside China to separate dysprosium and terbium.

But scale remains the brutal reality.

Reuters notes Lynas produced roughly eight tonnes of dysprosium and terbium combined during Q1 2026. China exported approximately 14 tonnes per month of those materials to Japan during 2024. That gap tells the real story.

The West still focuses heavily on mining narratives. China still dominates what matters most: industrial-scale separation, refining, metallization, alloying, and magnet manufacturing. And in Great Powers Era 2.0, Beijing increasingly appears willing to leverage that dominance geopolitically.