Strategic Implications for Japan’s Economic Policy: Lessons from Recent Geopolitical Developments

The United States and Iran have agreed to a two-week ceasefire. Nevertheless, the geopolitical environment in the Middle East remains highly volatile, and the risk of renewed large-scale military confrontation has not been eliminated. Furthermore, as the United States increasingly emphasizes an “America First” approach, it is difficult to dismiss the possibility that localized geopolitical risks will materialize across multiple regions. Against this backdrop, this paper outlines key policy implications for Japan’s economic strategy, drawing lessons from recent developments.

■ Strategic Vigilance Toward Global Maritime Chokepoints Beyond the Strait of Hormuz
Despite Iran’s substantial inferiority in conventional military capabilities, its ability to negotiate with the United States from a position of relative strength can be attributed in part to its geographic leverage over the Strait of Hormuz. The recent disruption of traffic through the Strait effectively halted a critical artery of global logistics. Maritime chokepoints are often described as such because their closure can severely constrain global economic activity. Indeed, the closure of the Strait of Hormuz rapidly heightened uncertainty over the global economic outlook, underscoring the critical role these passages play in global trade and energy supply.
Importantly, the Strait of Hormuz is not the sole chokepoint of strategic significance. Other vital maritime passages and sea routes—including the Malacca Strait, the Denmark Strait, the Cape of Good Hope, the Suez Canal, and the Panama Canal—are equally integral to global supply chains. Looking ahead, there is an increasing risk that states possessing influence over these strategic areas may, in pursuit of their national interests, adopt tactics similar to those employed by Iran. Policymakers and investors alike must remain cognizant of these vulnerabilities when assessing global economic and geopolitical risk.

■ Reassessing Inventory and Procurement Strategies Under Heightened Geopolitical Risk
Under prevailing cash-flow–focused management practices, minimizing inventories has long been regarded as an optimal strategy. However, in an environment characterized by elevated geopolitical risk, this approach is becoming increasingly untenable. Going forward, both the public and private sectors will need to maintain inventories of critical materials and inputs at levels commensurate with risk exposure, prioritizing resilience alongside efficiency.
That said, there are practical limits to the extent to which any single country can independently stockpile strategic resources. Accordingly, collaborative stockpiling and procurement frameworks with like-minded partners should be pursued. However, such arrangements are not without risk; political instability or regime change in partner countries could undermine agreed commitments. From a risk-management perspective, national capacity-building should remain the foundation, with international cooperation functioning as a complementary, rather than substitutive, element of supply-chain resilience.

■ Strengthening the Japan–U.S. Alliance While Diversifying Diplomatic and Economic Partnerships
While the United States is reasserting a more inward-looking policy stance, it continues to view Asia as a strategically vital region, ranking just behind areas traditionally regarded as core U.S. spheres of influence, such as the Western Hemisphere. In this context, it is unlikely that U.S. policy toward Asia will mirror its recent reassessment of its commitments under NATO in Europe. Consequently, for Japan, continued strengthening of the Japan–U.S. alliance and deepening of bilateral trade and economic ties remain of central importance.
At the same time, achieving a more balanced and autonomous partnership with the United States requires Japan to reduce excessive dependence on any single country. This necessitates the diversification of diplomatic and economic relations. In particular, Japan should accelerate engagement with economies in the Global South, including India. Moreover, recent supply shocks—especially in energy markets—have renewed global interest in Africa’s resource potential. As the world’s final major growth frontier, Africa warrants sustained strategic engagement, both as a source of resources and as a long-term partner in global economic development.

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