Japanese Prime Minister Takaichi Sanae and French President Emmanuel Macron on April 1 elevated economic security to the center of their “exceptional partnership,” unveiling concrete measures to strengthen supply chain resilience and diversify energy sources amid rising global instability.

Their summit took place against the backdrop of one of the most severe energy disruptions in decades. Amid a military conflict involving Iran, Israel, and the United States, the Strait of Hormuz – through which roughly one-fifth of global oil and LNG shipments normally pass – has effectively ceased functioning as a stable commercial artery. Tanker traffic has slowed to a near standstill amid persistent threats and attacks, sending Brent crude prices sharply higher and reviving memories of the 1970s oil shocks, particularly in energy-dependent economies like Japan.

For Tokyo, which relies on imports for nearly all of its energy and critical minerals, the crisis underscores structural vulnerability. Paris, though less directly dependent on Gulf supplies, views the turmoil as a stark reminder of the need for greater strategic autonomy. In their joint statement, the two leaders explicitly framed economic security as a core component of national and collective defense.

In opening remarks at the Akasaka State Guest House, Takaichi stressed the growing interdependence between regions. “The security of the Euro-Atlantic and the Indo-Pacific is closely interconnected,” she said, describing France as an “exceptional partner” that shares fundamental values and maintains a territorial presence in the Indo-Pacific. Macron echoed the call for closer coordination, particularly under France’s G-7 presidency, which will culminate in the Evian summit in June.

A centerpiece of the summit was the Japan-France Roadmap on Critical Minerals, which reflects mounting concern over supply concentration, export controls, and economic coercion in strategic sectors.

While not naming specific countries, the language clearly addresses the risks associated with dominant suppliers in global rare earth markets. China currently accounts for roughly 70 percent of mining and 90 percent of refining capacity, leaving industrial economies exposed to potential disruptions.

The roadmap moves beyond declaratory language toward concrete industrial cooperation. A key element is support for the Caremag rare earth refining project in southwestern France, expected to begin operations by late 2026. Japanese stakeholders, including the Japan Organization for Metals and Energy Security (JOGMEC) and Iwatani Corporation, are participating alongside French partners.

Once operational, the facility could supply up to 20 percent of Japan’s demand for heavy rare-earth oxides such as dysprosium and terbium – materials essential for high-performance magnets used in electric vehicles, wind turbines, advanced electronics, and defense systems.

The agreement also includes collaboration on upstream mining projects in third countries, accelerated development of recycling technologies, and coordination through the “RISE” (Resilience and Integrated Supply Chains for Energy) partnership, which seeks to integrate resource-rich developing economies into more diversified and resilient energy-related supply chains. Together, these measures aim to reduce overreliance on any single supplier and mitigate the risks associated with economic coercion.

Both leaders also reaffirmed the importance of ensuring freedom of navigation in the Strait of Hormuz and maintaining stable flows of energy and critical materials, while committing to close diplomatic coordination aimed at de-escalating tensions in the Middle East.

Nuclear energy featured prominently as a long-term pillar of both energy security and decarbonization strategy. A separate joint declaration commits Japan and France to deepen cooperation on fast reactors, the nuclear fuel cycle, and fusion energy.

This includes continued collaboration on major international projects such as ITER, currently under construction in France, and Japan’s JT-60SA, the world’s largest superconducting tokamak, which is preparing for advanced plasma operations later this year.

France brings decades of operational expertise and industrial leadership in nuclear power, while Japan contributes advanced research capabilities and a renewed focus on next-generation reactors. For both countries, nuclear energy offers a stable, low-carbon baseload alternative at a time when fossil fuel markets are increasingly volatile.

Beyond energy and minerals, the summit marked progress in a broader set of strategic domains. The two governments agreed to launch a high-level dialogue on dual-use artificial intelligence and to deepen cooperation in quantum technologies, space (including debris mitigation), and cybersecurity.

A new joint declaration on startups and innovation aims to strengthen industrial competitiveness and facilitate cross-border collaboration. France also expressed support for Japan hosting a future AI summit, aligning with both the Hiroshima AI Process and the broader G-7 agenda.

The meeting built on momentum from the recent foreign and defense ministers’ “2+2” talks, which produced a new defense roadmap and enhanced interoperability across maritime, air, space, and cyber domains. France’s sustained military presence in the Indo-Pacific adds operational depth to the partnership.

Both leaders reaffirmed their commitment to a “free and open Indo-Pacific,” opposition to unilateral changes to the status quo by force or coercion, and continued coordination on regional challenges, including North Korea’s nuclear and missile programs.

The April 1 summit reflects a broader shift in international strategy. In an era of “weaponized interdependence” – where supply chains can be disrupted by conflict, export controls, or deliberate market manipulation – like-minded democracies are moving toward more resilient, diversified networks.

For Japan, the agreements provide practical mechanisms to stabilize energy costs and secure inputs for high-tech and green industries. For France, they reinforce European strategic autonomy while positioning Paris as a bridge between Europe and the Indo-Pacific.

Challenges remain. Implementing the critical minerals roadmap will require sustained public and private investment, technological advances in recycling, and careful diplomacy in third countries. Nuclear cooperation must navigate regulatory and public acceptance hurdles. Meanwhile, geopolitical volatility from the Middle East to the Taiwan Strait will continue to test the durability of the partnership.

Yet the trajectory is clear. By embedding economic security at the heart of their bilateral relationship, Japan and France are not merely responding to immediate crises – they are laying the groundwork for a more resilient strategic future.

In an increasingly fragmented global order, the France-Japan partnership underscores a broader shift toward strategic alignment among like-minded democracies, where economic security, energy resilience, and geopolitical stability are becoming inseparable.