Oil risks from Iran conflict push prices higher, complicating BOJ policy path
MARKET INSIDER – Rising tensions in the Middle East are no longer just a geopolitical headline—they’re feeding directly into inflation dynamics in one of the world’s largest economies. Japan’s latest data shows price pressures picking up again, signaling that the Iran-linked energy shock could ripple far beyond oil markets and into global monetary policy decisions.
Core inflation in Japan rose to 1.8% in March, its first acceleration in five months, as surging energy costs tied to the Iran conflict begin to filter through the economy. While still below the Bank of Japan’s 2% target, the shift marks a turning point for policymakers navigating a fragile recovery and rising global uncertainty.
The broader inflation picture reveals a complex tug-of-war. Headline inflation edged up to 1.5%, while the more stable “core-core” measure—excluding both food and energy—slipped to 2.4%, its lowest since late 2024. This divergence underscores a critical reality: Japan’s inflation is increasingly being driven by external shocks rather than domestic demand, a pattern that complicates policy decisions in Tokyo and beyond.
Prime Minister Sanae Takaichi’s government has moved aggressively to contain the fallout, rolling out fuel subsidies and tapping crude reserves to stabilize prices. A nationwide cap on gasoline prices at around ¥170 per liter is under consideration, even as officials warn that market prices could surge toward ¥200. The fiscal cost is steep—potentially ¥300 billion per month—but reflects a broader global trend of governments stepping in to shield consumers from energy volatility.
For central bankers, the stakes are even higher. Analysts from major institutions including Bank of America and Crédit Agricole Corporate and Investment Bank expect energy-driven inflation to intensify into the summer, pushing expectations higher and reinforcing the case for gradual rate hikes. Markets are now watching closely ahead of the Bank of Japan’s upcoming policy meeting, where rates are expected to hold at 0.75%—but with a distinctly hawkish tone amid concerns over yen weakness and imported inflation.
This comes at a delicate moment for Japan’s economy, which narrowly avoided recession in late 2025. Growth remains modest, and policymakers are increasingly balancing a dual mandate: sustaining economic expansion while preventing inflation from slipping out of control. That balancing act is becoming harder as external shocks—from oil to currency markets—play a larger role.
The implications extend far beyond Japan. As energy prices once again become a dominant driver of inflation globally, the risk of synchronized policy tightening across major economies is rising. For investors, the question is no longer whether geopolitical risk matters—but how quickly it feeds into inflation, interest rates, and ultimately, asset prices.
If oil remains elevated, Japan’s inflation could approach 3% by 2026—forcing a more decisive shift from the world’s last ultra-loose monetary regime. And in a market long defined by deflation, that transition could reshape global capital flows in ways few are fully pricing in yet.
