Key Takeaways
- The United States‑Israeli conflict with Iran has effectively closed the Strait of Hormuz, disrupting roughly one‑fifth of global oil and LNG shipments, 80 % of which head to Asia.
- Japan’s Prime Minister Sanae Takaichi warned that the closure is having an “enormous impact” on the Indo‑Pacific region during her visit to Australia.
- Japan and Australia signed new agreements to deepen cooperation on energy, critical minerals, the economy, and defence while in Canberra.
- Australia will provide up to A$1.3 billion (≈US$937 million) to support critical‑mineral projects with Japanese involvement, targeting gallium, nickel, graphite, rare earths and fluorite.
- The two allies also announced a A$10 billion (≈US$7 billion) deal for Japan to supply Mogami‑class stealth warships to the Australian navy, reflecting expanding military ties amid shared concerns over China’s rise.
- Both nations rely heavily on each other for energy: Australia supplies about one‑third of Japan’s total energy needs and is its largest LNG market.
Background on the Strait of Hormuz Disruption
Since the United States and Israel launched military action against Iran on 28 February 2026, shipping through the Strait of Hormuz has been largely blocked. The strait normally handles about 20 % of the world’s oil and liquefied natural gas (LNG) flows, and the International Energy Agency estimates that four‑fifths of that volume is destined for Asian markets. The resulting bottleneck has tightened global energy supplies, pushed up prices, and forced importing countries to scramble for alternative sources.
Japanese Prime Minister’s Assessment
During a three‑day visit to Australia, Prime Minister Sanae Takaichi told reporters that “the effective closure of the Strait of Hormuz has been inflicting enormous impact on the Indo‑Pacific.” She emphasized that the disruption is not merely a regional inconvenience but a strategic challenge that threatens energy security across the breadth of Asia and the Pacific. Her remarks underscored Japan’s urgency in seeking reliable partners to mitigate the supply shock.
Energy Cooperation Agreements Signed
On the first day of her visit, Takaichi and Australian Prime Minister Anthony Albanese issued a series of statements pledging closer collaboration on energy, the economy, defence, and critical minerals. The agreements aim to synchronize policy responses, share intelligence on market developments, and jointly invest in projects that can replace or supplement Hormuz‑dependent supplies. Both leaders framed the partnership as a proactive measure to safeguard their nations’ economic stability.
Australia’s Role in Japan’s Energy Mix
Australia currently supplies roughly one‑third of Japan’s total energy consumption and is the country’s largest market for liquefied natural gas. Given Japan’s limited domestic energy resources, Canberra’s LNG exports are a cornerstone of Tokyo’s energy security strategy. The Hormuz disruption has heightened the strategic importance of this bilateral relationship, prompting both sides to explore ways to increase Australian LNG shipments to Japan and to diversify Japan’s import portfolio.
Concerns Over Liquid Fuels and Refined Products
Prime Minister Albanese echoed Takaichi’s worries, stating that Australia is “very concerned by disruptions to the supply of liquid fuels and refined petroleum products.” Refined products such as diesel and jet fuel are essential for transportation, industry, and military operations. Any prolonged shortage could impede economic activity and defence readiness, making the stabilization of these supply chains a shared priority for the two governments.
Critical Minerals Initiative
A significant component of the new cooperation package is Australia’s commitment to provide up to A$1.3 billion (≈US$937 million) in funding for critical‑mineral projects that involve Japanese firms. The funds will support the extraction and processing of minerals such as gallium, nickel, graphite, rare earths, and fluorite—materials vital for semiconductor manufacturing, electric‑vehicle batteries, and advanced weapons systems. By securing a reliable source of these inputs, Japan aims to reduce its vulnerability to geopolitical supply interruptions.
Expanding Military Ties
Beyond energy and minerals, Australia and Japan have been deepening their defence partnership. Last month the two countries announced a A$10 billion (≈US$7 billion) contract for Japan to deliver Mogami‑class stealth warships to the Royal Australian Navy. This deal reflects a broader trend of increased joint exercises, intelligence sharing, and coordinated planning in response to evolving regional security dynamics, particularly the growing assertiveness of China in the Indo‑Pacific.
Strategic Implications for the Indo‑Pacific
The convergence of energy insecurity, critical‑mineral demand, and defence collaboration signals a strategic realignment among US allies in the Indo‑Pacific. Japan and Australia are leveraging their complementary strengths—Australia’s resource wealth and Japan’s technological and industrial capacity—to build resilient supply chains and bolster collective security. As the Hormuz closure continues to reverberate through global markets, such bilateral initiatives are likely to become a template for other nations seeking to mitigate similar vulnerabilities.
Conclusion
The Strait of Hormuz disruption has exposed the fragility of Asia‑Pacific energy supplies, prompting swift diplomatic and economic action. Prime Minister Takaichi’s visit to Australia resulted in concrete agreements to expand LNG flows, fund critical‑mineral ventures, and enhance military cooperation, including a major warship sale. Together, these steps illustrate how Japan and Australia are confronting immediate challenges while laying the groundwork for a more secure and prosperous regional future.