The World's "Oil Insurance" is Decreasing - U.S. SPR at 43-Year Low, Price Surge Risk Looms for Japan

America's "Last Insurance" Reaches a 43-Year Low

In the United States, one of the world's largest oil producers, the "last insurance" that has supported energy security is rapidly depleting.

The balance of the U.S. Strategic Petroleum Reserve, known as SPR, fell to approximately 298.7 million barrels as of August 7, 2026. This marks a decrease of about 6.1 million barrels from the previous week. It is the first time in roughly 43 years, since 1983, that it has fallen below 300 million barrels.

The SPR is not just a stockpile of crude oil.

It is a national-level emergency reserve held by the U.S. government to prepare for significant disruptions in normal oil supply due to war, natural disasters, or import interruptions. According to the U.S. Department of Energy, the current authorized storage capacity is 714 million barrels. This means the current reserve level has fallen well below half of that capacity.

The primary factor behind this decrease is the energy crisis surrounding the Middle East.

In 2026, the flow of crude oil and petroleum products through the Strait of Hormuz significantly dwindled. According to the U.S. Energy Information Administration (EIA), crude oil and petroleum liquids transported through the Strait of Hormuz dropped from about 21.6 million barrels per day in the fourth quarter of 2025 to about 4.9 million barrels per day in the second quarter of 2026.

For the global oil market, this is not a change that can be absorbed by normal supply-demand adjustments.

Countries turned to their long-held "oil savings."

The World's Largest Strategic Reserve Drawdown Begins

In March 2026, the International Energy Agency (IEA) decided that member countries would collectively supply an emergency oil reserve of 400 million barrels to the market to respond to supply disruptions caused by the Middle East situation.

The contribution plans announced later included approximately 172.2 million barrels from the United States alone. Japan also planned to supply about 79.8 million barrels, leading to an unprecedented global-scale reserve release.

This measure had a certain effect.

Despite the sharp reduction in supply through the Strait of Hormuz, major consumer countries have avoided situations where gasoline and diesel became completely unavailable. The reserves functioned exactly as the "cushion to absorb supply shocks" they were intended to be.

However, the problem is that the cushion has its limits.

The U.S. SPR exceeded 400 million barrels before the Middle East crisis but has now fallen below 300 million barrels. The more it is used to stabilize the market, the less capacity there is to prepare for the next crisis.

This is not just a distant issue for Japan.

In fact, Japan is currently in a situation where it must be more concerned about the U.S. oil situation than a few years ago.

Japan's Prominent "Middle East Dependency"

When considering Japan's energy issues, there are unavoidable figures.

The dependency on Middle Eastern crude oil imports.

According to statistics from the Agency for Natural Resources and Energy, the proportion of Middle Eastern regions in Japan's crude oil imports was 94.7% in fiscal year 2023. Even in 2025, the dependency on the Middle East exceeded 90%, making Japan's dependency on the Middle East outstanding among developed countries.

The United States itself is a massive oil producer and can procure large amounts of crude oil from countries like Canada.

On the other hand, Japan's domestic crude oil production is extremely limited.

Crude oil is transported by tanker from Saudi Arabia, UAE, Kuwait, etc., and refined into gasoline, diesel, kerosene, jet fuel, naphtha, etc., at domestic refineries. This system has supported Japan's industry and lifestyle.

The most critical point of this transportation route is the Strait of Hormuz.

Therefore, the crisis in 2026 was extremely serious for Japan.

Since March, crude oil imports from the Middle East to Japan have significantly decreased, prompting the Japanese government to take the unprecedented step of releasing national reserves.

In March, the Ministry of Economy, Trade and Industry announced the release of approximately 8.5 million kiloliters of national reserve crude oil, equivalent to one month's supply. In April, an additional release equivalent to about 20 days was announced as a second measure.

As of March 2026, Japan had one of the world's largest oil reserves, equivalent to about eight months of supply, including both public and private sectors.

This massive reserve bought time for the Japanese economy.

Japan's Emergency Measure of "Buying from the U.S."

Simply depleting reserves will eventually lead to exhaustion.

Therefore, Japan simultaneously pursued the diversification of crude oil procurement sources.

The United States, in particular, increased its presence.

In June 2026, Japan's crude oil imports amounted to approximately 10.03 million kiloliters. Of this, imports from the United States were about 3.24 million kiloliters, marking an extraordinary increase of approximately 7,200% compared to the same month of the previous year.

The United States quickly emerged as one of Japan's major crude oil suppliers.

Meanwhile, imports from the UAE, which had been one of the largest suppliers, amounted to about 3.59 million kiloliters, and Saudi Arabia about 2.17 million kiloliters, reducing the Middle East dependency to 62.3%.

Of course, this does not mean that Japan has completely broken away from Middle East dependency in the long term.

It is the result of emergency responses to the Hormuz crisis, gathering crude oil from the U.S., South America, and Middle Eastern routes that bypass the Strait of Hormuz.

The government also indicated in June that the procurement volume from the U.S. in July was expected to be more than ten times the monthly average of the previous year.

For Japan, U.S. crude oil has become precisely the "alternative supply source when oil no longer comes from the Middle East."

Here, the sharp decline in the U.S. SPR emerges as an issue for Japan.

"U.S. Reserve Decrease ≠ Export Halt to Japan"

However, it is important to distinguish one crucial point.

Just because the U.S. SPR has fallen below 300 million barrels does not mean that crude oil exports to Japan will stop at that moment.

The SPR is an emergency reserve held by the government and is separate from regular crude oil production, commercial inventories, and exports by private companies.

The United States remains one of the world's largest oil producers and has significantly increased its crude oil and petroleum product exports in 2026 to compensate for the reduced supply from the Middle East.

The EIA also predicts as of August that the strong global demand for U.S. crude oil will continue into 2027.

Therefore,

"SPR decreased"
↓
"U.S. oil runs out"
↓
"Exports to Japan stop"

is not a simple equation.

The issue lies elsewhere.

Commercial inventories within the U.S. are also at low levels, with high refinery operating rates, export demand, and reduced imports occurring simultaneously domestically.

In other words, the U.S. is supplying a large amount of oil to the world while supporting its own consumption and even using government emergency reserves.

The fact that the margin is gradually thinning is what's important.

If the Middle East crisis prolongs further and domestic gasoline prices in the U.S. surge again, discussions in U.S. politics could naturally intensify, questioning "why oil is being exported overseas when domestic prices are high."

Whether the U.S. actually moves towards export restrictions is another matter, but for Japan, the political risk itself becomes an issue.

Japan Faces a New Challenge of "Dependency Shift from the Middle East to the U.S."

This crisis proved that Japan could procure crude oil from sources other than the Middle East.

This is a significant achievement.

The crude oil import volume, which had once significantly declined, recovered to exceed the previous year's level by June.

The government has also indicated that stable supply can be secured through March 2028 through alternative procurement and reserve releases.

Therefore, there is no immediate situation where oil will run out in Japan.

However, when considering the long term, another issue becomes apparent.

Buying oil from the U.S. when it can no longer be purchased from the Middle East does not solve the energy security problem.

Simply changing the supply source from one region to another creates a new dependency.

Ideally, a system should be created that combines multiple supply sources, such as the U.S., Canada, Latin America, Australia, and bypassable regions in the Middle East, to avoid excessive dependence on specific straits, countries, or regions.

The fact that Japan was able to procure a large amount of crude oil from the U.S. this time is a success story, but it also raises the next question: "What if the U.S. runs out of capacity?"

The Ripple Effect on Japan's Economy Beyond Just Gasoline

When it comes to oil issues, many people think of gasoline prices.

However, the impact on Japan's economy is not limited to that.

When crude oil prices rise, the cost of truck transportation, which uses a large amount of diesel, increases.

If logistics costs rise, it affects a wide range of prices, including groceries, daily necessities, and online shopping products at supermarkets.

In the airline industry, increased jet fuel costs put pressure on ticket prices.

In the fishing industry, fuel costs for fishing vessels increase.

In agriculture, fuel is used for machinery and greenhouse cultivation.

Naphtha is also crucial.

Naphtha is a raw material for plastics and chemical products, used in a wide range of industries such as automobiles, home appliances, packaging materials, and clothing.

Thus, the rise in crude oil prices is not just a "gas station problem" but has the potential to increase costs across the entire Japanese economy.

Additionally, since crude oil is traded in dollars, if the yen depreciates simultaneously, Japan's import burden further increases.

If an energy crisis coincides with currency depreciation, it could ripple from corporate prices to consumer prices, potentially affecting the Bank of Japan's monetary policy.

On Social Media, "Crisis Theories," "Political Debates," and "Calm Analysis" Intermingle

The news that the U.S. SPR fell below 300 million barrels quickly spread on platforms like X and Reddit.

On X in the Japanese-speaking community,

"Entered dangerous territory for the first time in 43 years"

"If U.S. reserves decrease, won't it affect supply to Japan?"

"It's a big problem for Japan, which is buying from the U.S. instead of the Middle East"

such posts expressing a sense of crisis are prominent.

There are also posts that chart the U.S. SPR balance and extend the current rate of decrease to suggest "it will reach even more dangerous levels in a few weeks."

However, caution is needed with such simple linear forecasts.

The amount of reserve releases by the government is not constant every week. It varies greatly depending on diplomatic situations, crude oil prices, private inventories, tanker transport volumes, and scheduled deliveries.

"Just because it decreased by 6.1 million barrels this week doesn't mean it will decrease by 6.1 million barrels every week."

In Reddit's oil-related communities, discussions on this point are active.

One post presented a model suggesting that the pace of reserve drawdown would slow down in late July, indicating that the SPR decrease would soon stop.

However, with the confirmation of a significant decrease of about 6.1 million barrels for the week ending August 7, the poster acknowledged that the previous model was no longer valid and stated, "We need to look at data for the coming weeks."

It is interesting to see the movement on social media to update data and revise predictions.

On the other hand,

"We should replenish the SPR immediately"

"Past administrations were criticized for reserve decreases, but there's little reporting this time"

such political reactions within the U.S. are also noticeable.

The SPR tends to become a political tool not only for energy policy but also for partisan battles between Republicans and Democrats.

Therefore, on social media, pure supply-demand analysis and political assertions are mixed.

Furthermore, the X account of the Iranian Embassy in Japan also highlighted the reduction of the U.S. SPR to 298.7 million barrels, indicating that the reserve decrease itself has become a tool for diplomacy and information warfare.

Therefore, expressions like "U.S. oil will run out in a few weeks" spreading on social media should not be taken at face value.

What needs to be confirmed is not just the SPR but the overall picture, including U.S. crude oil production, commercial inventories, refinery operating