As of April 2026, Japanese manufacturers—particularly in the automotive and related industries—are experiencing production, supply, and cost pressures due to disruptions in petroleum supplies. The Iran conflict has tightened petroleum supply, essential for plastic components like FRP and Carbon Fiber.
Key Impacts on Japanese Manufacturing:
**Material Shortages: Major firms, including Mitsubishi Chemical and Mitsui Chemicals, have cut production of ethylene—a key material for plastics—due to shortages of raw naphtha.
**Rising Costs and Prices: Manufacturers are raising prices on products requiring naphtha-based materials, including adhesives and plastics.
**Logistics and Energy: The conflict has prompted a rise in oil prices, affecting shipping and the availability of raw materials.
While some firms are attempting to diversify their supply chain away from the Middle East, the immediate impact on production remains significant due to the high dependence on imported petroleum.
Status of the Strait of Hormuz
As of late April 2026, the Strait of Hormuz is experiencing a severe, ongoing blockade-standoff resulting from the US-Israeli conflict with Iran, which began on February 28, 2026. While early signs of minor traffic recovery appeared around April 25, 2026, the waterway remains functionally restricted by both Iranian actions and a US naval blockade.
Current Status and Impact:
**Significant Disruption: The crucial waterway, which usually handles a fifth of the world’s oil, has been largely blocked for nearly two months, with traffic heavily suppressed compared to the typical 129 daily transits.
**Failed Reopening Attempts: While Iran has occasionally suggested it would reopen the strait if the U.S. lifts its naval blockade, negotiations have not successfully resolved the dispute.
The situation remains highly volatile, with both sides leveraging the blockade to gain strategic advantage amid a fragile broader conflict.
Projections for the Strait of Hormuz reopening suggest a slow, phased recovery rather than an immediate return to normal, with full traffic unlikely until the second half of 2026. While Iran has proposed a reopening tied to ending the US blockade and war, current maritime traffic remains at a near-standstill.