The crisis in the East China Sea pushed Tokyo to redesign supply chains, research and procurement, with a new model of technological autonomy

When, the September 7, 2010, a Chinese fishing vessel collided with two vessels of the Japan Coast Guard in the disputed waters around the Senkaku Islands, the crisis initially seemed limited to a recurring territorial dispute. But the captain's arrest triggered a reaction that was to prove decisive: Beijing stopped exports of Rare lands, essential materials for electronics, energy and automotive.

Le Senkaku islands, known in China such as Diaoyu Islands and Taiwan Like the Tiaoyuta Islands, they form a small uninhabited archipelago in the East China Sea.

Currently under Japanese administration, they are part of Okinawa Prefecture and their territory is administered by the municipality of Ishigaki. However, they are claimed by both the Republic of China and the People's Republic of China, which assert sovereignty over the archipelago based on historical and geographical criteria.

At the time of the accident, Tokyo was dependent on the large neighboring country across the sea for almost 90 percent of imports of these elements, essential for high-performance magnets, batteries, electric motors, drive systems, and sensors. The Chinese blockade lasted weeks, but its effects continued for months: the price of rare earths rose to ten times within a year, putting pressure on Japanese industry.

The Senkaku incident thus brutally revealed the fragility of the entire supply chain. As the Japanese Ministry of Economy and Finance (METI) would state years later, it was

“one of the most profound industrial disruptions of the entire post-war period.”

This awareness led to the definition of a real “industrial emergency plan” that would change the way Japan deals with technological dependence.

The five pillars of Japan's post-accident strategy

In the month following the accident alone, the Japanese government approved a special budget to 100 billion yen, launching a value chain resilience program based on five main guidelines.

Reducing the use of rare earths
Companies were given incentives to develop high-efficiency magnets and components with lower amounts of neodymium, dysprosium, and terbium. Toyota, for example, accelerated research into magnets free of the chemical element with atomic number 66, which are now used in several lines of hybrid vehicles.

Search for alternative materials
Universities and innovation centers like Tohoku University launched programs to develop functional replacements for rare earths. Since 2023, some of these materials have been integrated into high-frequency power electronics.

Advanced recycling of rare earths
Japan has developed some of the most advanced urban mining technologies in the world. According to 2024 data from the National Institute for Environmental Studies, over 25 percent of domestic rare earths today it comes from industrial recycling and small electrical equipment.

Geographical diversification
Tokyo has supported investments in Australian and Vietnamese mines, expanding sourcing from countries considered more stable. Thanks to partnerships with companies such as Lynas Rare Earths, with offices in Pahang Darul Makmur, Malaysia, and Perth, Australia, dependence on China has fallen from 90 percent to 60 percent in copper.

Creation of national stocks
Japan has begun stockpiling critical materials, an approach similar to that already in place for oil. By 2024, public stocks will cover several months of industrial needs.

How do you explain Shunichi Sugawara, researcher at the Institute of Energy Economics Japan (IEEJ),

"The Senkaku crisis has forever changed the paradigm of industrial security. Today, Japan views critical raw materials as strategic infrastructure, not simply a commercial component."

A decade of innovation: from urban mining to material efficiency

The policies adopted after 2010 have not only diversified supplies: they have pushed the development of new technologies, transforming the crisis into an accelerator of innovation.

One of the most significant is the so-called

“urban extraction”.

Millions of smartphones, batteries, and hard drives contain precious quantities of rare elements: collected, processed, and refined, they constitute a new mine spread across urban areas. Japan is now a world leader in this sector.

At the same time, advanced materials research has led to a significant reduction in the amount of critical elements used in high-tech products. Between 2010 and 2024, Japan's rare earth consumption has halved, not due to a drop in production, but to improvements in efficiency.

METI and the National Institute for Materials Science (NIMS) have also initiated collaborative programs with Japanese companies to develop high-performance terbium-free sintered magnets, an achievement considered impossible just a few years ago.

Secondo Yuko Genchi, professor of materials engineering at Tohoku University,

"The 2010 experience transformed research: it was no longer a matter of improving what already existed, but of reinventing the fundamentals of magnet production. It was a quiet, but profound, revolution."

The 2024–2025 scenario: the lesson of the Senkakus is almost global

Fourteen years after the accident, the rare earth issue is no longer just a Japanese problem. The energy transition, the expansion of electric vehicles, and the battery industry have made the value chains of critical materials a global geopolitical issue.

In 2023 and 2024, China introduced new restrictions on the export of gallium and germanium, essential materials for optoelectronics and semiconductors. In parallel, institutions such as theInternational Energy Agency have published reports calling for strengthening the resilience of critical supply chains, right in the wake of the Japanese experience.

The European Union is trying to replicate part of the Japanese model through the Critical Raw Materials Act, with recycling, extraction, and storage goals. The United States has expanded Department of Energy funding programs for resilient supply chains.

However, according to several analysts, only a few countries have developed a systemic approach comparable to the one developed by the Japan after 2010.

The industrial geostrategy that transformed the Sino-Japanese crisis

The case of the Senkaku Islands illustrates how a single event can catalyze a structural transformation. The 2010 embargo affected Asia's largest manufacturing economy after China, but it generated responses that continue to influence Japanese industrial policy.

Today, the country has reduced its vulnerability, strengthened its role in advanced materials technologies, and built a more flexible and diversified rare earth supply chain. Yet, the residual dependence, approximately 60 percent, indicates that the issue remains open.

The Senkaku case has now become a reference in university courses on geopolitics and supply chain management: a real laboratory that demonstrates how technological innovation, advanced research and strategic vision can arise from a sudden crisis.

The story offers three main lessons: be vigilant about your value chains, always diversify critical sources, and invest in technologies that reduce dependencies and consumption.

In a world where the electronics, energy andartificial intelligence are increasingly interdependent, the Japanese experience in the waters of the Senkaku Islands remains one of the most complete examples of how to build industrial resilience in the twenty-first century.

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