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The Bank of Japan (BOJ) raised its main interest rate to 1.25%, a 31-year high, from 1% in a widely expected move, signaling a shift away from ultra-low borrowing costs to curb inflation. The decision, part of six rate hikes in two and a half years, reflects Japan’s struggle with rising prices, a weak yen, and global energy price volatility, as central banks worldwide tighten monetary policy.

The BOJ’s rate hike, announced on Friday, marks the first time since 1995 that the central bank has reached this level, driven by persistent inflation and pressure to align with global monetary tightening. Core inflation fell to 1.7% in August 2026 from 1.8% the previous month, though it remains near the 2% target. The move comes as energy prices surge due to the Iran war’s disruption of the Strait of Hormuz, a critical shipping route for Japan’s energy imports.

Japan’s reliance on Middle Eastern energy has left it vulnerable to global price shocks, exacerbating a weak yen that reached a 40-year low in August 2026. The BOJ’s tightening is intended to strengthen the yen, reduce import-driven inflation, and stabilize the currency amid geopolitical tensions. However, if the yen remains weak despite higher rates, the BOJ may need to act more aggressively, risking economic slowdown.

The central bank’s decision aligns with the U.S. Federal Reserve’s first rate hike in over three years and the European Central Bank’s recent borrowing cost increases. Analysts warn that Japan’s shrinking workforce and economic pressures could complicate the effectiveness of the policy. Meanwhile, Japan and the U.S. have coordinated interventions to stabilize the yen, with both governments indicating willingness to act again if needed.

Tokyo and Washington confirmed coordinated intervention to stabilize the yen in August 2026, marking the first joint action since 2011. Both Japan’s Ministry of Finance and U.S. Treasury Secretary Scott Bessent signaled readiness for further interventions if the yen’s weakness persists.

Japan’s BOJ raised rates to a 31-year high to combat inflation and stabilize the yen, aligning with global tightening trends. The move risks further tightening if yen weakness persists, but could help curb import-driven inflation. The BOJ’s coordination with the U.S. highlights ongoing challenges in balancing economic growth and currency strength.

Topics: Economic Policy, Central Banking, Inflation, Currency Markets, Global Finance, Monetary Policy, Japan Economy, Interest Rates, Currency Stability

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Source: BBC