The Domino Effect of Middle East Tensions: Iran’s Leadership Shift and Its Shadow Over Japan’s Economy

The world is once again paying close attention to rising tensions in the Middle East. Following the reported passing of Iran’s Supreme Leader, Ali Khamenei, at the end of February, leadership has reportedly shifted to Mojtaba Khamenei. The decision, made by the 88 clerics of Iran’s Assembly of Experts, quickly sparked strong reactions from the international community, particularly the United States and Israel.

Mojtaba Khamenei’s appointment was met with large public gatherings inside Iran. According to reports, thousands of people gathered in Enghelab Square carrying banners reading “Your path will continue.” The crowd also chanted slogans such as “Death to America” and “Death to Israel,” signaling continued resistance toward Western pressure and reinforcing concerns that geopolitical tensions in the region may intensify.

Responses from rival nations were equally sharp. Former U.S. President Donald Trump publicly criticized the appointment, questioning Mojtaba’s qualifications. Meanwhile, Israel reportedly issued stronger warnings, suggesting it would not hesitate to take military action against any successor who continues the policies of the late Ali Khamenei.

The Global Economic Ripple Effect

Rising geopolitical tensions in the Middle East are not just political or military concerns—they often trigger significant ripple effects across the global economy. One of the countries beginning to feel these pressures is Japan.

On paper, Japan’s economy had recently shown positive momentum. In the fourth quarter of 2025, Japan’s Gross Domestic Product (GDP) grew by 1.3% year-on-year, supported by stronger business investment, which was revised upward to 1.3% from an initial estimate of 0.2%. The government of Prime Minister Sanae Takaichi has been actively encouraging corporate investment to strengthen strategic industries.

At the same time, the Bank of Japan (BoJ) is expected to maintain its current interest rate policy in the March meeting, with the possibility of a rate increase in April.
However, the growing tensions in the Middle East are beginning to cast a shadow over this economic optimism. Escalating conflicts have pushed global oil prices higher. For Japan, a country heavily dependent on energy imports, rising oil prices present a serious economic challenge.

Combined with the weakening Japanese yen, higher energy costs could significantly increase import expenses. In the long run, this may reduce household purchasing power and consumer spending—two key drivers of Japan’s economic stability.

This situation highlights a powerful reality of today’s interconnected world: a leadership shift and rising tensions in the Middle East can quickly create economic consequences on the other side of the globe.