70% of Korea's Oil Passes Through This Strait: 5 Reasons the Hormuz Blockade Is a Direct Hit to the Korean Economy

If this strait closes, the Korean economy grinds to a halt. After U.S. and Israeli airstrikes on Iran, the threat of a Hormuz blockade — through which 20% of the world's oil passes — has become a reality, triggering an energy security emergency in Korea, which has one of the world's highest dependencies on Middle Eastern energy.

TL;DR

• The U.S. and Israel struck Iranian nuclear and military facilities on February 27–28, 2026; following the death of Supreme Leader Khamenei, Iran launched retaliatory strikes
• Iran's Revolutionary Guard Corps (IRGC) declared a blockade of the Strait of Hormuz; at least 4 civilian vessels were hit
• Korea imports 70.7% of its crude oil and 20.4% of its LNG from the Middle East — among the highest dependency rates in the world
• Oil prices forecast to reach $100–$130 per barrel; shipping freight rates feared to surge 50–80%
• The government has activated an emergency task force and is reviewing measures such as a temporary fuel tax cut

1. Why Hormuz? — The World's Oil 'Bottleneck'

The Strait of Hormuz is a narrow waterway approximately 54 km wide — the only sea route through which oil from major producers such as Saudi Arabia, the UAE, Iran, Iraq, and Kuwait reaches Asia and Europe. Daily transit volumes account for roughly 20% of global seaborne oil trade (approximately 18 million barrels of Brent crude per day).

After Iran signaled its intent to blockade the strait and at least 4 civilian vessels were struck, ships from the U.S., Japan, the EU, and other major nations began rerouting or holding position. Using alternative routes would push freight rates up by as much as 50–80% over current levels and extend transit times by 3–5 days, disrupting supply chains across the board.

2. Korea's Achilles' Heel — 70.7% of Crude Oil, 20.4% of LNG from the Middle East

According to the Korea International Trade Association, Korea imports 70.7% of its crude oil and 20.4% of its LNG from the Middle East. Daily crude imports run at approximately 1.7 million barrels, making it extremely difficult to secure alternative suppliers quickly if the blockade is prolonged.

Korea's Strategic Petroleum Reserve stands at roughly 97 days' worth of supply (by Ministry of Trade, Industry and Energy standards), but some refiners and power generators hold operational inventories of only 30–45 days. If Hormuz transit is cut off for two months or more, production and power generation disruptions could become a reality.

3. The $100-per-Barrel Scenario — A Triple Blow to Petrochemicals, Aviation, and Shipping

Global analytics firms warn that a Hormuz blockade could push Brent crude above $100 per barrel, and a full-scale war could send it past $130.

• Petrochemicals: Soaring naphtha prices raise production costs for ethylene and polyethylene, directly eroding export competitiveness
• Aviation: Jet fuel accounts for 30–35% of operating costs; a 50% rise in oil prices could cut operating profits in half
• Shipping: Domestic carriers such as HMM benefit partially from higher freight rates, but rising fuel costs offset gains

4. A Double Hit to Exports and Investment — Middle East Project Disruptions

Korean firms have secured major contracts for Saudi Arabia and UAE-led mega-projects such as NEOM and Dubai. If the Middle East becomes a powder keg:

• Defense exports: Delays in executing K-defense contracts with the UAE and Saudi Arabia
• Construction and infrastructure: Risks to local labor and materials procurement
• IT and manufacturing: Operational risks for Samsung Electronics and LG Electronics facilities in the region

According to the Overseas Koreans Agency, as of 2025, 17,823 Koreans reside in the Middle East, with approximately 295,000 visiting annually.

5. Government and Corporate Responses — and Their Limits

The Ministry of Trade, Industry and Energy has activated an emergency energy task force and is monitoring Hormuz transit conditions in real time. Measures under consideration include:

Professor Kang Sung-jin of Korea University advised: "The Hormuz blockade looks likely to last for some time. The government needs to simultaneously prepare price-stabilization measures like a fuel tax cut and long-term support for logistics disruptions."

Outlook — How Long Could This Last?

Khamenei's death has created an internal power vacuum in Iran, raising the likelihood that the incoming leadership will maintain a hardline stance. Professor Heo Yun of Sogang University stated: "There is no clear successor to the Khamenei system, making a prolonged Hormuz blockade highly likely." Experts broadly expect at least 2–4 weeks of high-intensity tension.

For the Korean economy, the 'March rebound scenario' — built on hopes of a semiconductor supercycle and rising equity markets — now faces the risk of being derailed by an energy shock.

References

• Korea's 70% crude oil, 20% LNG dependency on Middle East raises industry concern — Yonhap News
• Emergency over Hormuz blockade fears: "Korea imports 70% of crude from the Middle East" — Korea Economic Daily
• Oil at $130 if Hormuz blockade drags on — what does it mean for markets? — Korea Economic Daily
• Korea's hopes of economic rebound dealt blow as Iran throttles oil shipping — Korea JoongAng Daily
• "Korea's economy will suffer serious damage" — U.S. expert warning — Korea Economic Daily

Image Credit

• Satellite image of the Strait of Hormuz: NASA / Wikimedia Commons (Public Domain)