Japan's proposal for a G7 joint stockpile of critical minerals is a pivotal move toward building a collective economic defense against supply chain vulnerabilities.
The immediate trigger for this proposal was China's unpredictable export control policy. In late 2025, Beijing tightened restrictions on rare earth elements, causing market turmoil. It later introduced 'general' export licenses, which temporarily eased the situation but kept the underlying control mechanism in place. This created what is essentially an 'on/off switch' for global supply, leaving industries from defense to electric vehicles in a state of constant uncertainty. The International Energy Agency (IEA) has highlighted this risk, noting that China controls around 70% of the global refining capacity for many strategic minerals.
However, this G7 proposal did not emerge from a vacuum. First, the European Union's Critical Raw Materials Act (CRMA) provides a ready-made policy template for coordinated stockpiling and joint purchasing, making the idea operationally credible. Second, Japan has been laying the groundwork for years. Its national organization, JOGMEC, already manages domestic stockpiles, and a March 2026 U.S.–Japan Action Plan explicitly mentioned 'coordinated stockpiling.' This makes the G7 initiative a logical extension of existing efforts rather than a radical new idea.
Beyond just stockpiling, Japan is aggressively pursuing supply chain diversification. This is a multi-pronged strategy to reduce reliance on any single source. Tokyo is sending a delegation to Greenland to explore rare earth development, backing a heavy rare earth project in Namibia, and co-funding a separation facility in France. It is even advancing its own deep-sea mining technology near Minamitorishima, signaling a long-term commitment to developing alternative resources.
Ultimately, this mineral security agenda is deeply intertwined with a broader industrial and defense compact among allies. Japan is strengthening its security ties with the UK through the Global Combat Air Programme (GCAP) and with Italy through space cooperation. By linking mineral security to defense and high-tech industries, the G7 stockpile proposal becomes more than just an economic policy; it's a strategic pillar for a resilient, allied-led global supply chain.
- Rare Earths (REEs): A group of 17 metallic elements crucial for manufacturing high-tech products like smartphones, electric vehicle motors, and missile guidance systems.
- JOGMEC: Japan Organization for Metals and Energy Security, a government agency responsible for securing a stable supply of energy and mineral resources for Japan.
- G7 (Group of Seven): An intergovernmental political and economic forum consisting of Canada, France, Germany, Italy, Japan, the United Kingdom, and the United States.