The International Energy Agency announced a coordinated release of 400 million barrels of strategic reserves by 32 member countries after fears of major supply disruption caused by US and Israeli strikes on Iran. The move — the largest collective drawdown in history — was intended to steady global markets, but Brent crude quickly returned above $100 a barrel at the next session, underscoring market doubts about the speed and scale of physical deliveries.
Tehran has tried to walk a line between escalation and control: Iran’s deputy foreign minister said the Republic will allow some countries’ ships to transit the Strait of Hormuz and denied laying mines there, even as the new supreme leader vowed revenge and to continue using closure of the strait as leverage. Washington and Tehran have traded public threats and claims of naval action, with the US accusing Iran of mine-laying and saying it destroyed multiple Iranian mine-countermeasure vessels; Iran disputes the mining allegation.
Japan, heavily reliant on Middle Eastern crude and alarmed by a de facto closure of parts of the Hormuz corridor, moved first among major importers. Prime Minister Sanae Takaichi announced unilateral releases starting March 16 — an initial 15 days from private stockpiles followed by a 30-day tranche from national reserves, plus seven days’ supply from jointly held buffers with oil producers. Tokyo’s unilateralism, rare among IEA members, signals acute concern about supply chains and raises the prospect of more national-level actions if the crisis deepens.
Analysts warn that strategic stockpile releases have structural limits: auctions, shipping and refinery scheduling mean crude does not immediately hit consumers. Market players point to a realistic maximum throughput from reserves of roughly 1.2 million barrels per day based on past coordinated releases, versus estimates that regional disruptions could affect up to 1,000–1,600 million barrels per day of flows. That gap helps explain why gasoline prices in the United States have jumped sharply in recent days, and why investors remain jittery.
The situation now is as much geopolitical as commercial. The Hormuz chokepoint remains central to global energy security, and any sustained attempts to weaponize it would compel shippers to reroute via longer pipelines and alternate ports, impose higher insurance and freight costs, and likely draw naval powers deeper into the dispute. With rhetoric escalating, coordinated diplomatic de‑escalation and practical measures to keep seaborne trade moving will be as important as additional barrels on the water.