Akio Yamaguchi, representative director of the Japan Association of Corporate Executives, said an agreement between the U.S. and Iran to end fighting should resolve energy supply disruptions.

This development is critical for Japanese industry because the country relies heavily on the stable import of crude oil and naphtha. Geopolitical instability in the Middle East often triggers price volatility and procurement delays that threaten manufacturing output and economic stability.

Speaking at a press conference in Tokyo on Monday, June 15, 2026 [1], Yamaguchi said he hoped that the memorandum of understanding between the two nations would quickly clear obstacles within the supply chain. He said that the reduction of geopolitical risks would allow for the smooth procurement and transport of essential energy resources.

Yamaguchi said, "I greatly hope that the resolution of obstacles in the smooth procurement supply chain for crude oil and naphtha will be realized early."

The business leader said that the psychological impact of the agreement would be significant for the private sector. He said that the move toward peace would remove the uncertainty that has hampered corporate planning and investment.

"I believe that psychological anxiety will be considerably wiped out," Yamaguchi said.

While Japanese business leaders are optimistic, some international reports have presented a more nuanced view of the diplomatic timeline. While most reports indicate an agreement has been reached, other sources suggest the two nations are very close to a deal but have not yet finalized all terms.

I believe that psychological anxiety will be considerably wiped out

The optimism from the Japan Association of Corporate Executives reflects the extreme sensitivity of the Japanese economy to Middle Eastern stability. Because Japan lacks domestic energy resources, any disruption to the naphtha and crude oil supply chain creates immediate inflationary pressure and operational risk for its petrochemical and automotive industries. A formal cessation of hostilities between the US and Iran would likely lead to a decrease in the 'risk premium' typically added to oil prices during regional conflicts.