Summary of Key Points
Eight months after China implemented restrictions on the export of rare earths to Japan, the effects have been significant: Japan's imports of critical heavy rare earths (such as dysprosium and yttrium) have plummeted by over 70%, exposing the futility of its 16-year efforts to reduce its dependence on China. Although Japan has attempted to find alternatives through overseas mines and strategic reserves, it faces numerous challenges. China monopolizes over 90% of the global reserves and 100% of the refining capacity for these elements. Western allies lack the necessary refining capabilities, and deep-sea mining technologies are prohibitively expensive. As a result, Japan can only rely on its stockpiles, which will eventually run out, exacerbating the critical bottleneck in its manufacturing industry.
Detailed Analysis
1. How effective are the restrictions?
Eight months after the Chinese restrictions, data from Japan's Ministry of Finance revealed a stark reality: in the first half of 2026, imports of dysprosium iron alloy dropped by 82% to just 13 tons, and imports of yttrium oxide fell by 74% to 204 tons. Ironically, Japanese companies resorted to smuggling by embedding rare earth magnets in motors and declaring them for export, only to be caught and face legal consequences. This indicates that Japan has failed to find any viable alternative sources and is forced to take desperate measures.
Why are these rare earths so crucial? For example, dysprosium acts as a stabilizer in electric vehicle motors, preventing demagnetization at high temperatures, while yttrium provides a protective layer in chip etching machines, resisting plasma corrosion. Without them, Japan's automotive and semiconductor industries would be paralyzed, effectively cutting off the lifeblood of its manufacturing sector.
2. Was Japan's 16-year effort to reduce dependence on China in vain?
Japan began its efforts to reduce dependence on China after the 2010 Diaoyu Islands incident, aiming to lower its reliance from 90% to 60%. However, this was merely a semantic game:
- Light rare earths vs. heavy rare earths: Light rare earths are like flour (used in large quantities and readily available), while heavy rare earths are like salt (used in small amounts but indispensable). Japan's claimed 60% dependence is based on total tonnage, but China controls 90% of the global reserves for heavy rare earths and 100% of the refining capacity. Even if other countries have mines, they would need to transport the raw materials to China for processing.
- Overseas mines are unreliable: Australia's Lynas mine produced only 8 tons of dysprosium and terbium in the first quarter, compared to China's monthly supply of 14 tons before the restrictions. Mines in Vietnam and India either lack the capacity or cannot refine heavy rare earths. The combined imports from these 12 sources still fall short of China's restricted supply.
3. Why can't Western allies help?
China monopolizes the rare earth refining technology, making it an unattainable goal for others:
- China's technological superiority: Xu Guangxian invented the "staged extraction method" in the 1970s, which allows for efficient separation of rare earths at a fraction of the cost compared to Western methods. This has driven down prices, leading Western companies to shut down mines and factories, leaving them without the necessary expertise and equipment.
- Rebuilding capacity is a costly endeavor: The American company Molycorp spent $4 billion on trying to rebuild its refining plant but went bankrupt when China lifted export quotas, causing rare earth prices to plummet. Any attempt by Western countries to rebuild would cost billions and take more than a decade, with costs several times higher than those in China.
4. How is Japan surviving?
Japan's only option is to rely on strategic stockpiles, but this is a temporary solution:
Since 2010, Japan has increased its strategic reserves from 40 days to 180 days and subsidizes companies to maintain stockpiles for 2-3 months. This is why Japan's manufacturing industry has not collapsed despite the restrictions, but this relief is only temporary.
However, stockpiles will eventually run out. Surveys show that 90% of Japanese companies are deficient in at least one rare earth material, and only 68% of their procurement needs are met. 80% of executives consider rare earths a critical risk. Once the stockpiles are depleted, Japan's manufacturing industry will be truly devastated.
5. Deep-sea mining of rare earths: a pipe dream?
Japan has touted the potential of rare earth deposits on the seabed near the Nanjo Islands, claiming they could last for 700 years, but this is unattainable:
- Technological challenges: Humans have never successfully mined on such deep seas (the deepest oil extraction reaches 3,600 meters), and pipelines and mining machinery would be crushed by the high water pressure.
- Exorbitant costs: The cost of deep-sea mining is 20 times higher than that of land-based mining in China. Even if Japan could extract the rare earths, it lacks the capacity to refine them, and it would have to send them to China for processing.
- Time constraints: Domestic production would take at least 10 years, by which time Japan's manufacturing industries might be long gone.
Conclusion
China's rare earth restrictions are not a short-term deterrent but part of a long-term strategy. After 16 years of effort, Japan has failed to reduce its dependence on China, and its stockpiles are dwindling. All alternative plans have proven ineffective. In this "rare earth war," China holds the upper hand. Japan must either submit or watch its manufacturing industry slowly wither away.
(End of translation)