The outbreak of war in Iran has pushed both South Korea and Japan to the edge of a combined security and economic crisis, according to reporting in the Chosun Ilbo. Available analyses cited in that reporting—most prominently from the Center for Strategic and International Studies—identify South Korea as suffering the most severe economic shock among non-combatant countries, with acute damage concentrated in the macro-economy, energy, petrochemicals, and semiconductor sectors.

The shock has shown up in financial markets and currency moves. Stock markets plunged to record lows while the won fell to a 17-year low, signaling investor flight and heightened risk aversion. At the same time, the OECD responded to the new environment by cutting its growth forecast for South Korea by 0.4 percentage points and raising its inflation projection to 2.7 percent, a combination that underlines the twin pressures of slower activity and higher consumer prices.

International institutions have sought to quantify the broader economic fallout. The UNDP has estimated roughly $194 billion in losses across the Middle East, illustrating the scale of regional disruption that is now transmitting to East Asian economies through trade, energy prices, and financial channels. The reporting also highlights how the conflict’s commodity dynamics are benefiting other producers: available notes indicate that Russia is seeing gains from higher oil revenue as global supply shifts.

For South Korea, the concentration of damage in energy-intensive and export-linked industries creates a particularly fragile mix. Petrochemicals and semiconductors form pillars of the country’s external sector, and disruptions in oil markets and supply chains feed directly into production costs and export competitiveness. The CSIS assessment, cited by the Chosun Ilbo, frames this combination as the reason South Korea appears to be the non-combatant most severely affected so far.

The geopolitical dimension compounds the economic stress. Beyond immediate price effects, the Iran war is exposing strategic vulnerabilities—energy dependence, supply-chain chokepoints, and financial market sensitivity—that both Seoul and Tokyo will need to address. While the available reporting focuses on current impacts and macroeconomic revisions, it also implies a need for policy responses to shore up energy resilience and manage inflationary pressures without deepening recessionary risks.

Published on April 4, 2026, the Chosun Ilbo’s coverage synthesizes think-tank analysis and multilateral estimates to sketch a rapidly evolving picture: a regional security shock with clear and measurable economic consequences, unevenly distributed but particularly painful for South Korea, and reshaping global winners and losers in energy revenue.