The closure and blockade of the Strait of Hormuz amid escalating conflict between the U.S., Israel, and Iran has triggered severe disruptions in global oil supply, impacting economies from Japan to China and the United States [2][4][6]. In Japan, industry leaders are urging a shift toward Alaskan crude oil to mitigate risks posed by Middle Eastern supply disruptions, despite technical challenges for refiners. Alaskan crude would arrive 15 days sooner than Middle Eastern shipments, offering a potential stabilizing effect on Japan’s energy market during international tensions [1]. Japanese factories, transport providers, and service industries are facing acute fuel shortages, prompting the government to tap oil reserves and seek alternative supply routes. Analysts warn that continued blockade could further raise fuel prices, impacting production schedules and export competitiveness [2].
In the United States, the Iran conflict has pushed gas prices to a national average of $3.95 per gallon, up $1.02 from a month ago, with California reaching $5.79 per gallon and diesel surging to $5.28 per gallon, up $1.69 over the same period [4][6]. Diesel price increases are rippling through supply chains, raising logistical costs. Energy Secretary Chris Wright announced that the U.S. will release 1 to 1.5 million barrels per day from its Strategic Petroleum Reserve, with emergency releases potentially reaching 3 million barrels per day. The U.S. will contribute 172 million barrels as part of a coordinated International Energy Agency effort to inject 400 million barrels into the global market [6]. Wright emphasized that the U.S. will not limit diesel exports and described the supply disruption as a short-term challenge, noting that oil prices have surged more than 30% since the conflict began on February 28 [6].
China, the world’s largest oil importer, is experiencing panic at gas stations as Sinopec warned of a significant price hike, initially set at 2,205 yuan per metric ton (about $1 per gallon), later reduced to 1,160 yuan per metric ton by the National Development and Reform Commission. Gas currently costs about $4.50 per gallon in China, and the hike is expected to cost drivers hundreds of dollars more per month [5]. The disruption has complicated logistics and raised costs for China, which remains the largest buyer of Iranian oil. Despite the conflict, shipments continue, but increased risk and higher prices are squeezing Beijing’s energy lifeline [3][5].
The U.S. conflict with Iran has also delayed a planned summit between President Trump and Chinese President Xi Jinping, originally scheduled for March 31 to April 2, now postponed by "a month or so" due to the ongoing war. Analysts suggest that U.S. actions in Iran and Venezuela are increasing leverage over China by raising the cost and risk of oil imports [3]. The blockade of the Strait of Hormuz, which carries roughly 20 million barrels of oil per day and one-fifth of global liquefied natural gas, is being closely watched by traders and is expected to keep upward pressure on fuel prices globally [4][6].
According to [1], Japanese industry leaders see the crisis as an opportunity to diversify supply beyond the Middle East, while [2] and [6] highlight urgent government and industry responses to the supply crunch. [3] and [5] report on the broader geopolitical implications for China, including delayed diplomatic engagement and economic strain. [4] and [6] provide detailed data on price surges and strategic reserve releases, underscoring the high market impact.
CONCLUSION
The blockade of the Strait of Hormuz has triggered a global oil supply crisis, leading to sharp price increases, strategic reserve releases, and urgent efforts to secure alternative sources. Governments and industries in Japan, China, and the U.S. are responding with emergency measures, but the disruption is expected to keep upward pressure on prices and expose vulnerabilities in energy supply chains. The market impact is high, with ongoing geopolitical tensions likely to drive further volatility.