Japan Tightens Domestic Control Over Fuel Supplies as Hormuz Tensions Rise

Tokyo is moving to shore up home-grown safeguards for oil and gas after recent unrest in the Strait of Hormuz rattled traders and raised the prospect of supply interruptions.

Japanese officials and industry leaders say the latest confrontations near the Persian Gulf have exposed how vulnerable the country remains to bottlenecks far from its shores. Most of Japan’s crude arrives by tanker, with roughly nine out of ten barrels imported from overseas routes that cross the Hormuz corridor. That dependence has prompted ministers to accelerate plans to increase onshore fuel reserves, encourage storage at private refineries and push for contracts with a broader set of producers.

For consumers and businesses the measures are meant to blunt price shocks. The government is offering temporary incentives so refiners can hold extra stocks and is exploring tax breaks to make longer-term storage economically viable. Analysts say those moves could smooth retail fuel swings that hit households and manufacturers, but they won’t eliminate the risk of short-term spikes if shipments are disrupted. “Buying time through bigger stores helps, but it’s costly and can’t replace a steady flow of crude,” an energy analyst in Tokyo said.

Tokyo is also quietly courting alternative suppliers and looking to boost shipments that avoid the narrowest chokepoints. Negotiations have intensified with partners in North America and Southeast Asia for more LNG and crude cargoes, while some industrial buyers are signing longer contracts to lock in price and delivery. At the same time, the government is nudging electrification and efficiency programs at the consumer level — from subsidies for heat-pump heaters to support for commercial energy retrofits — as a way to reduce exposure to volatile fuel markets.

Security measures are being reviewed as well. The Maritime Self-Defense Force has on occasion increased patrols and provided logistical support for commercial traffic near contested sea lanes, and Tokyo is discussing information-sharing with regional navies. Officials stress these steps are defensive and temporary, aimed at keeping commerce flowing rather than opening a broader security confrontation.

Longer term, policymakers see this as a push to speed the transition away from single-source reliance. That includes reviving stalled nuclear projects where politically possible, expanding wind and solar capacity, and encouraging domestic firms to build buffer inventories. Such shifts will take years and require trade-offs between cost, public acceptance and energy reliability. For now, Tokyo’s priority is straightforward: make sure families and factories can keep running even if trouble in the Gulf worsens.