The world’s third-largest economy is mobilizing an historic defense against a Middle East oil supply shock, with Japan announcing the biggest-ever release from its national petroleum reserves — approximately 80 million barrels to domestic refiners from Thursday. Prime Minister Sanae Takaichi confirmed the deployment in response to the US-Israel conflict with Iran disrupting tanker traffic through the Strait of Hormuz, which serves as the gateway for over 90% of Japan’s crude oil imports. The scale of the economic interests at stake has driven a response of unprecedented magnitude.
Japan’s economy — one of the world’s largest and most sophisticated — is built on a foundation of reliable energy supply. Disruptions to this foundation, as the 1973 oil shock demonstrated, can send economic shockwaves that last for years. The current government has acted with unusual speed and scale to prevent any such disruption from taking hold, deploying 80 million barrels — 45 days of consumption, 1.8 times the previous record — from reserves totaling approximately 470 million barrels.
The consumer-facing dimensions of the response include fuel subsidies capping gasoline at approximately ¥170 per litre, down from a record ¥190.8, reviewed on a weekly basis. The government is clearly committed to preventing the global oil price spike from translating into a sustained domestic inflation problem. Both large companies and ordinary households will benefit from the stabilization of fuel prices.
Social media anxiety about shortages of everyday goods has been countered by active communications from government and industry. The Japan Household Paper Industry Association confirmed that nearly all of Japan’s toilet paper is made domestically from recycled materials, with no exposure to Middle Eastern supply disruptions. Officials urged rational purchasing behavior and accurate information sharing.
Takaichi’s international posture has combined constitutional restraint with diplomatic ambition, declining Trump’s naval request while committing to sustained multilateral engagement. She has described Middle East stability as vital for Japan and the global community. Protecting the world’s third-largest economy from an oil supply shock requires both the depth of Japan’s reserves and the breadth of its diplomacy.