South Korea & the Strait of Hormuz.
South Korea's exposure is structural in a different way from Japan's. Korea is not just a buyer of Gulf crude; it is the world's largest exporter of refined products from that crude, with Ulsan and Yeosu functioning as the regional clearing houses for diesel, jet, and naphtha. A Hormuz disruption hits both the import side (72% of crude) and the export franchise downstream. The country has hedged faster than most: US shale crude is now a material minority share, long-term LNG contracts span three continents, and the strategic reserve covers ~200 days. The Korean Navy's Cheonghae unit operates in the Gulf of Aden, but force-projection inside the strait remains a US-led function. Korea's refining margins are the best real-time indicator of stress on the entire East Asian supply chain.
Strait status now
EFFECTIVELY CLOSED
Crude imports via Hormuz
72%
Daily import value at risk
$143M
at $73.34/bbl Brent
Strategic reserve
200d
days of net imports
Energy profile
- Oil consumption
- 2.7 mbpd
- Crude imports
- 2.7 mbpd
- Hormuz crude dependency
- 72%
- Hormuz LNG dependency
- 25%
- Reserve days
- 200d
- Reserve volume
- 97 mbbl
Top suppliers
- 01Saudi Arabia· largest
- 02United States
- 03Kuwait
- 04United Arab Emirates
- 05Iraq
Key facts
- Fourth-largest crude importer globally; world's third-largest LNG importer.
- About 72% of crude imports transit Hormuz; the US share has grown post-2018 but remains a minority.
- Strategic stockpile covers ~200 days of net imports.
- A single chokepoint feeds the world's largest refining cluster at Ulsan and Yeosu.
- Naval forces participate in the IMSC and Northwood-style coalitions but rely on US Fifth Fleet for area control.
Vulnerabilities
- Refining concentration: a Hormuz disruption immediately threatens diesel and jet exports to neighbouring Asia.
- Petrochemical exports, a top revenue line, depend on stable Gulf naphtha feedstock.
- No domestic crude; effectively zero pipeline alternatives.
- Korean shipowners operate the largest VLCC fleet, exposing the country to insurance-multiple shocks.
Mitigations
- Diversification into US shale crude has been deliberate and ongoing since 2018.
- Long-term LNG contracts with the US, Oman, and Australia.
- Co-investment in Petroline-adjacent infrastructure with Saudi Aramco (Ulsan storage).
- Active member of the IMSC; Cheonghae Anti-Piracy Unit deployed to the region.
Historical context
Korea responded to the 1979 oil shock by accelerating refining capacity for export and locking in long-term contracts with Gulf producers. That export-led refining model is now the country's principal exposure: a Hormuz closure does not just curtail imports, it freezes the export-oriented downstream that funds them.