96 Percent and One Narrow Strait: Japan's Oil Shock of 2026

Let me start with a number that should keep anyone awake: 96 percent.

That is how much of Japan's crude oil imports came from the Middle East in March 2026. Saudi Arabia alone supplied 54 percent. The United Arab Emirates another 35 percent. Kuwait 4 percent. Almost all of it traveled through a single stretch of water no wider than 50 kilometers at its narrowest point: the Strait of Hormuz.

And then, on February 28, the strait effectively closed.

Iran, responding to US Israeli strikes that killed Supreme Leader Khamenei, imposed a de facto blockade. Tankers stopped moving. Insurance became impossible. And Japan, the world's fourth largest oil consumer, suddenly discovered just how vulnerable its energy supply actually was.

The Numbers That Tell the Story

By early April, the data had landed like a bad diagnosis. Japan's March oil imports fell to 52.03 million barrels, a 30 percent drop from February and the lowest since records began in 2013. The April forecast is even worse: an expected 42.15 million barrels, a 41 percent plunge from February levels.

This is not an inconvenience. This is a supply shock of historic proportions. The Japanese government now estimates that even with aggressive alternative sourcing, May imports will only reach about 60 percent of what the country imported in the same month last year.

Prime Minister Takaichi Sanae has been frank about the situation. On social media, she assured the public that Japan holds roughly eight months worth of oil stockpiles and that alternative routes are being pursued. Private sector reserves began releasing on March 16. State reserves followed on March 26. Joint stockpiles with oil producing nations are also being tapped.

But reserves are a bridge, not a destination. And the bridge may be longer than anyone hoped.

The Search for Alternatives

Japan is now scrambling to rewrite its energy geography. The immediate solution involves rerouting tankers from Gulf ports that bypass Hormuz entirely: Saudi Arabia's Yanbu port on the Red Sea, and the UAE's Fujairah port on the Gulf of Oman. Tankers taking these routes must navigate the Red Sea and the Suez Canal, adding weeks to delivery times.

The longer term solution is more ambitious and more uncertain. Takaichi has signaled that Japan is exploring crude imports from the United States, Central and South America, and even Azerbaijan. During a summit with President Trump, she confirmed that Japan and the United States would work together to expand US crude production and explore a joint stockpiling project.

What Comes Next for Japan

The Strait of Hormuz remains effectively closed as of early April. Iran shows no sign of relenting. The United States shows no sign of backing down. And Japan, caught in the middle, is quietly rewriting its energy strategy while hoping the bridge holds long enough to reach the other side.

For Japanese families, the impact is already visible. Gasoline prices hit an all time high of 190.8 yen per litre last week. The government is subsidizing fuel to bring the price down to around 170 yen, but that is a temporary patch, not a permanent fix.

Japan has enough stockpiles to survive months of disruption. But months are not years. And every day the strait remains closed, the world burns through its emergency cushions. The Japanese government has not yet called for mandatory conservation. But officials acknowledge that if the situation drags on, requests to limit driving and industrial activity may become unavoidable.

The last time oil did this, we called it a crisis. Now Japan is learning that the word may not have been strong enough.