Published: June 03, 2026, 00:09 UTC
The Gulf Crisis Is Forcing Japan Into a Fundamental Strategic Energy ReThink
Tokyo did everything right on paper — diversified LNG, built strategic reserves, restarted nuclear — and still finds itself dangerously exposed.
Here is the uncomfortable truth that Japan now confronts: you can prepare for a crisis for ten years, spend billions of yen, build the most sophisticated energy diversification strategy in the world, and still end up trapped.
Japan’s decadelong effort to insulate itself from Middle Eastern energy disruption has been proved right and rendered unworkable at the same time. The Strait of Hormuz crisis — sparked by the US-Israeli attack on Iran on February 28 and Iran’s effective closure of the waterway on March 4 — has validated every fear that drove Japanese energy policy since the 1970s oil shocks. It has also closed off most of the escape routes Japan spent years constructing.
The country is not facing blackouts. There are no scheduled power cuts in Tokyo or Osaka. JERA, Japan’s largest energy company, has acknowledged that only about five percent of its LNG shipments transit the Strait of Hormuz — a figure that would have been unthinkably high a decade ago when the share of Japanese LNG coming from the Middle East was 29 percent. By 2025, Japan had driven that number down to roughly 11 percent. This was the most sophisticated LNG diversification strategy anywhere in the world, and it has largely worked.
But the crisis is primarily one of price, not volume — and price is what is doing the damage. Foreign Policy’s James Baillie reports that the gap between Japan’s correct diagnosis and its unfinished cure is now costing the country well over a billion dollars a week.
The problem is crude oil.
The crude reality
Japan imports more than 85 percent of its energy. Of its crude oil imports last year, 94 percent came from the Middle East — 43 percent from the United Arab Emirates, 39 percent from Saudi Arabia. This dependence has proved stubbornly resistant to diversification. You can rewire an LNG supply chain in ways you cannot easily rewire a refinery system built for specific grades of Middle Eastern crude. Alternative suppliers are constrained. The global market for non-Gulf crude is tight, expensive, and getting tighter.
The CSIS analysis by Kristi Govella and Jane Nakano, published in March, noted that Japan has had “relatively more success in diversifying its imports of LNG” than oil. That is the gap that is now punishing Japan. LNG can be sourced from the United States, from Australia, from Russia. But crude oil is another matter. When the Hormuz chokepoint closes, Japan’s refineries — built for Arabian light and similar grades — cannot simply switch overnight to West African or North Sea barrels at the same price.
Asian countries as a whole account for 75 percent of the oil and 59 percent of the LNG that passes through the Strait of Hormuz. For Japan, South Korea, China, and India, this is not a supply chain disruption. It is a structural vulnerability that has been exposed, not created, by the conflict.
The nuclear answer
Japan has not been idle. The restart of TEPCO’s Kashiwazaki-Kariwa Unit 6 in February 2026 — nearly fifteen years after the Fukushima disaster shut Japan’s nuclear fleet down — brought the country’s active reactor count to 15, with a combined capacity of around 33 gigawatts. This is a significant rebound from the near-total nuclear shutdown that followed 2011, when Japan’s 54 reactors had provided roughly 30 percent of its electricity.
But 33 GW of nuclear capacity still accounts for only about 5.5 percent of Japan’s electric power supply — far short of the 20-22 percent share envisioned under the current strategic energy plan. There are 36 technically operable reactors remaining in Japan, but the restart process is slow, politically contested, and expensive. Each restart requires regulatory approval, local consent, and seismic safety upgrades. The crisis has accelerated the political will, but the engineering and bureaucracy take time.
The real question is whether the pace of nuclear restart can match the scale of the crisis. Japan has already released emergency oil reserves equivalent to a 30-day supply. Strategic reserves provide a buffer, not a solution. They buy time, but time is running out.
The broader Asian crisis
Japan is not alone. The Philippines declared a national energy emergency on March 24, 2026, with President Ferdinand Marcos Jr. stating that the war threatened “the availability and stability of the country’s energy supply.” The Philippines had enough fuel to last about 45 days at typical consumption levels. South Korea launched a nationwide energy-saving campaign, calling on citizens to ride bicycles for short trips and reduce shower times. Thailand and Vietnam have asked citizens to curtail energy use.
Fatih Birol, the executive director of the International Energy Agency, said the current oil crisis had surpassed the combined effect of the worldwide energy shocks of the 1970s. “No country will be immune to the effects of this crisis if it continues to go in this direction,” he told an audience in Canberra.
The IEA announced the release of 400 million barrels of oil from strategic reserves — the largest such release in the group’s 32-nation history. The Trump administration contributed nearly half of that from the US Strategic Petroleum Reserve, and also eased sanctions on Russian oil to try to calm the market. None of this has brought prices under control.
The alliance contradiction
There is a deeper problem that Japan cannot solve with energy policy alone.
Japan is a US security ally. It hosts American military bases. It has spent the past decade strengthening its own defense posture under the banner of “proactive pacifism.” The US-Israeli attack on Iran was not Japan’s war, but the consequences — the closure of Hormuz, the spike in oil prices, the disruption of global supply chains — are Japan’s problem. Japan depends on the Strait of Hormuz for its crude oil. The US, by contrast, is a net exporter of petroleum. It imported only 400,000 barrels of oil per day through Hormuz in the first quarter of 2025 — compared to Japan’s 1.6 million.
This is the contradiction at the heart of Japan’s position: your security guarantor is the country that started the conflict closing the waterway you depend on. There is no polite way to say this in diplomatic language, so I will say it plainly: Japan’s alliance with the United States is now in direct tension with its energy security. Every escalation in the Gulf hurts Japan more than it helps. Every month the Hormuz disruption continues, the cost in yen and in strategic leverage rises.
The CSIS analysts noted that the conflict “may serve as a test of the security policy reforms that Tokyo has undertaken over the past decade.” That test is now underway, and the results so far are not encouraging.
What comes next
Japan’s choices in the coming months will shape its energy posture for a generation.
The first option is a more aggressive nuclear restart program. The political will exists now in a way it has not since Fukushima. The question is whether the regulatory machinery and local consent processes can be accelerated without compromising safety. Japan may push to bring its 36 operable reactors online at a faster rate, targeting that 20-22 percent nuclear share within five years rather than ten.
The second option is a deeper pivot to US and Australian LNG. JERA is already exploring new LNG investments in Asia and the United States, and US LNG exports to Japan have been rising. But this comes with its own vulnerabilities — dependence on a single ally for fuel, and the long lead times required to build new liquefaction capacity.
The third option is energy austerity. Japan has already begun releasing strategic reserves. It may need to ask its population — as South Korea and Southeast Asian nations have — to reduce consumption. The 90 percent of Japanese respondents who told Asahi Shimbun they were anxious about the conflict’s economic impact may soon have practical reasons for that anxiety.
None of these options is comfortable. All of them carry costs that Japan had hoped to avoid. The decadelong diversification strategy was not a failure — it was the right thing to do, and it partially worked. But it was not enough, and now Japan is discovering that the gap between correct strategy and complete execution is measured in billions of dollars and in a dwindling supply of strategic options.
The crisis at Hormuz has done what no Japanese policymaker could have achieved in peacetime: it has forced Japan to confront, honestly and urgently, the fundamental question of what it means to be an energy-importing nation in an era of great-power conflict. The answers Japan produces will define its place in the world for a generation.