East Asia’s Geoeconomic Transformation in the Wake of the Iran War

East Asia’s exposure to the Strait of Hormuz is both structural and asymmetric. The region accounts for the lion’s share of global oil and LNG flows through the chokepoint. China alone receives 37.7 percent of all oil and condensate transiting the waterway, compared to approximately 10.9 percent for Japan and 12 percent for South Korea. In absolute terms, Japan imports nearly 95 percent of its crude from the Middle East, South Korea around 70 percent, and China over 40 percent of its total imports, with a significant portion routed via Hormuz.

LNG dependence compounds this vulnerability. Approximately 30 percent of China’s LNG imports originate from Qatar and the United Arab Emirates (UAE), while South Korea sources 14 percent and Japan 6 percent from the same suppliers. When the Strait of Hormuz is blocked, these countries face an immediate energy supply gap. Japan and South Korea, with minimal domestic production, have already begun drawing down strategic petroleum reserves at historic rates. Japan has released tens of millions of barrels, equivalent to weeks of supply, while South Korea has activated emergency market-stabilization measures. China, despite possessing the world’s largest strategic petroleum reserves and maintaining some domestic production capacity, is accelerating imports from alternative suppliers and expanding spot purchases on global markets. Even so, prolonged disruption could lead to elevated refining margins and cascading shortages of critical petrochemical feedstocks essential for plastics, fertilizers, and electronics manufacturing.

Industrial Strain and Economic Fallout

These strategic vulnerabilities strike at the heart of East Asia’s industrialized economies and their AI ambitions. Japan, South Korea, and China are not merely oil importers; they are manufacturing powerhouses whose global competitiveness depends on stable, affordable energy. Rising oil prices translate directly into higher production costs for steel, chemicals, semiconductors, and automotive components. South Korea’s semiconductor sector, which consumes vast amounts of electricity generated largely from imported fossil fuels, faces acute pressure. Energy accounts for a growing share of chip fabrication costs, and any sustained spike could erode the country’s edge in advanced nodes critical to global AI supply chains. Japan’s export-oriented industries, already navigating yen volatility, confront similar headwinds in automotive and electronics manufacturing. China, meanwhile, pursuing its own “new quality productive forces” agenda centered on AI and high-end manufacturing, sees inflation risks transmitted through logistics and feedstock prices.

Disruptions to the Strait of Hormuz also affect capital flows and bilateral economic ties. China, Japan, and South Korea have invested billions into Gulf states through infrastructure, renewable energy projects, and sovereign wealth partnerships. China’s Belt and Road Initiative has financed ports, refineries, and petrochemical complexes in Saudi Arabia and the UAE, aligning with Riyadh’s Vision 2030 and Abu Dhabi’s diversification goals. Japan has deepened its “investment corridor” with the UAE, focusing on technology, hydrogen, and nuclear cooperation. South Korea has secured multibillion-dollar deals in defense, nuclear, and green hydrogen with several Gulf states. However, disruptions to global shipping have intensified as rerouting around the Cape of Good Hope adds 10–14 days and millions of dollars per voyage. Combined with regional instability, this has delayed project timelines, inflated insurance costs, and dampened new investment commitments. Gulf sovereign wealth funds, facing revenue shortfalls from reduced oil exports, may slow outbound capital to East Asia. The result is a temporary contraction in two-way economic exchanges that had been deepening for over a decade.

East Asia’s Strategic Awakening

A striking geopolitical consequence of the conflict is the growing convergence in diplomatic posture among China, Japan, and South Korea. Despite Japan and South Korea being U.S. treaty partners and China a strategic competitor to Washington, all three adhere to a policy of non-interference in internal affairs and respect each country’s sovereignty. The three seek economic engagement in the Middle East while avoiding entanglement in regional conflicts, preferring to cultivate balanced relations across the region.

China’s response has been the most proactive on the diplomatic front. Immediately after the conflict escalated, Beijing dispatched Special Envoy Zhai Jun of the Chinese Government on the Middle East Issue to the region. On March 8, 2026, Zhai met Saudi Foreign Minister Faisal bin Farhan in Riyadh, and two days later he held talks with UAE Deputy Prime Minister and Foreign Minister Sheikh Abdullah bin Zayed Al Nahyan in Abu Dhabi. In both meetings, Zhai emphasized respect for sovereignty, condemned attacks on civilians and non-military targets, and called for immediate de-escalation and a political settlement. Beijing’s message that conflict and instability serve no one’s interests and that freedom of navigation and energy security are red lines resonated across the Gulf.

Japan and South Korea have adopted a parallel but more restrained approach. When President Trump publicly urged affected nations, including Tokyo and Seoul, to dispatch warships to a maritime security coalition patrolling the Strait of Hormuz, the response in both capitals remained lukewarm. Japanese Prime Minister Sanae Takaichi informed the parliament that Japan had “not made any decisions whatsoever about dispatching escort ships,” citing constitutional constraints and the need for independent assessment within legal frameworks. South Korea’s government indicated it would “closely coordinate and carefully review” the request without offering any firm commitment. Both capitals prioritize energy diplomacy and reserve drawdowns over military entanglement, mirroring China’s preference for mediation and neutrality. This shared preference for non-interference, combined with pragmatic engagement, reflects a deeper East Asian strategic culture that privileges economic realism over ideological alignment.

The Green Acceleration

Another significant geopolitical consequence of the war is the acceleration of East Asia’s energy transition. In recent years, China, Japan, and South Korea have established themselves as leading producers and adopters of advanced clean-energy technologies. China commands decisive advantages in solar photovoltaics, accounting for more than 80 percent of global manufacturing capacity. Beijing also leads in energy storage, particularly lithium-ion batteries, and electric vehicles, all sectors that contribute significantly to its economic growth. Meanwhile, Japan has taken the lead in hydrogen technologies and energy-efficiency solutions, while South Korea excels in battery chemistry and next-generation materials. With oil transportation disrupted, all three nations are placing greater strategic emphasis on rapidly developing renewable energy and low-carbon infrastructure.

China’s 15th Five-Year Plan (2026–2030) already prioritizes green hydrogen, long-duration storage, smart grids, and controlled nuclear fusion. The crisis provides added impetus, prompting Beijing to fast-track approvals for new solar and wind projects and expanded EV subsidies tied to domestic content. Japan has accelerated its “Green Growth Strategy,” targeting hydrogen imports and offshore wind. South Korea, facing the highest relative exposure among the three, is amending legislation to remove barriers to solar deployment and leveraging its world-class battery industry to pair renewables with industrial demand. The Hormuz shock has transformed what was already a strategic imperative for reducing fossil-fuel dependence into an urgent survival necessity.

Uncharted Territory

Beyond energy flows, the conflict is reshaping and potentially deepening East Asia’s institutional mechanisms. China, Japan, and South Korea have long maintained trilateral dialogue platforms, most notably the Foreign Ministers’ Meeting. The 11th such meeting, held in Tokyo in March 2025, highlighted cooperation on healthy aging, medical care, renewable energy, green development, and ecological protection. If the Strait of Hormuz crisis remains unresolved, energy issues are likely to become important topics on these future agendas. The crisis may therefore accelerate dialogue on “non-traditional security” matters.

This shift in institutional engagement reflects a broader reality: the US-Israeli war with Iran has placed East Asia in an unfamiliar position. Rather than serving merely as a passive observer of a distant conflict, the region now finds itself actively shaping its own energy future. Supply shortages, manufacturing disruptions, and stalled investments present immediate challenges. Yet East Asia’s measured diplomatic stance, combined with its accelerated push toward decarbonization, demonstrates resilience and strategic foresight. If the Strait of Hormuz crisis persists, it could drive the region toward greater energy self-reliance through green technologies, subtly enhancing its standing in the global economic landscape.

The views and opinions expressed in this article are those of the authors and do not necessarily reflect the views of Gulf International Forum.