The closure of the Strait of Hormuz by Iran, amid escalating conflict with the U.S. and Israel, has triggered significant disruptions across multiple sectors in Asia, particularly in Japan. Idemitsu Kosan, a major Japanese oil company, has warned business partners that it may halt ethylene production in Japan if the blockage continues to prevent naphtha imports from the Middle East, highlighting the vulnerability of Japanese manufacturers to geopolitical risks in the region [1][4]. Industry analysts note that ethylene is a core input for plastics and chemicals manufacturing, and a prolonged shutdown could lead to supply shortages, price spikes, and ripple effects across regional markets [1]. US oil prices surged 8% and Asian currencies weakened as traders reacted to fears of wider conflict and supply bottlenecks [1][6]. Technical analysis shows heightened volatility in energy and petrochemical stocks, with resistance levels being tested [1][4].
The closure has also severely impacted Japan's used-vehicle export market, as Dubai—a major hub for exports to the Middle East and Africa—has become inaccessible. This has created a backlog in Japan, risking a fall in domestic used vehicle prices due to oversupply, while developing economies in the Middle East and Africa face potential shortages and rising prices [2]. The Japan Used Motor Vehicle Exporters Association reported a sharp drop in shipments to Dubai, with exporters bracing for further declines if the situation persists [2].
Meanwhile, the shutdown of the Persian Gulf's largest LNG export terminal has sent Asian LNG prices soaring, creating a profit opportunity for U.S. LNG suppliers who can offer lower spot prices and flexible delivery options. American LNG exporters are seeing increased bookings as Asian buyers scramble to secure replacement cargoes, with tankers lining up at U.S. facilities [3]. Financial analysts highlight that the current market dynamic favors U.S. exporters, and continued volatility is expected as the Iran war disrupts global supply chains [3].
Japanese companies across sectors, including energy (Inpex, Toray, Idemitsu) and banking, are evacuating staff from the Middle East and reassessing risk exposure, with some implementing contingency plans and restricting business travel [4]. The conflict has led to higher insurance premiums for shipping near Iran and increased volatility in global energy markets [4]. Market sentiment remains cautious, with traders closely monitoring developments and technical analysis indicating crude oil prices are approaching key resistance levels [1][4].
Asian currencies, including the yen, South Korean won, Malaysian ringgit, and Indonesian rupiah, have weakened against the U.S. dollar as investors seek safety amid rising oil prices and geopolitical instability [6]. Technical analysis shows key support levels being tested, and analysts expect further downside pressure if the conflict escalates or oil prices rise further [6].
Chinese economic officials have acknowledged the risks posed by the Iran conflict, pledging to pursue 'balanced' trade and monitor commodity price volatility, while assuring that policy tools are in place to maintain financial stability [5]. The Asian Development Bank warns that a prolonged conflict may force Asian governments to revive COVID-style aid for the most vulnerable, especially in countries like the Philippines, Pakistan, and Sri Lanka, due to their heavy reliance on energy imports and the risk of rising fuel prices [7]. Policymakers are monitoring developments closely, with targeted support for low-income groups seen as a likely response if the situation deteriorates [7].
CONCLUSION
The closure of the Strait of Hormuz has caused major disruptions in energy, automotive, and financial markets across Asia, with Japanese manufacturers and exporters particularly hard hit. Market sentiment is negative, with increased volatility, weakening Asian currencies, and rising energy prices. Policymakers and companies are bracing for further instability, and emergency measures may be required if the conflict persists.