The Bank of Japan (BOJ) is expected to raise its policy interest rate to 1.25% from 1% at its meeting concluding on Friday, September 18, 2026. This would mark the highest interest rate in 31 years for Japan and is aimed at countering persistent inflation risks, particularly those driven by soaring oil costs. The widely anticipated move is seen as another step away from decades of ultra-low rates and brings the BOJ closer to neutral interest rate levels.

This rate hike would be the first in three months and follows pressure from the Federal Reserve's recent rate hike on Wednesday, September 17, 2026. Analysts note that a widening interest rate gap between the U.S. and Japan could further weaken the yen and increase import costs, thereby fueling inflation. The Fed's hawkish stance and projections of additional rate increases by mid-2027 have raised the stakes for the BOJ to tighten its monetary policy. The yen had weakened by as much as 1% overnight to 156.42 per dollar after the Fed's announcement.

Market participants, including former currency chief Takehiko Nakao, widely anticipated the 0.25 percentage point increase to 1.25%. Inflation, excluding fresh food and energy, is projected to rise further towards 2.5% by early 2027, according to Marcel Thieliant of Capital Economics. Central bankers are also motivated to support the yen, which previously fell to a 40-year low against the dollar in July, prompting a joint intervention by the U.S. and Japan. A weak yen makes imported goods more expensive, contributing to inflation and negatively impacting purchasing power.

While the BOJ is expected to raise rates, it is unlikely to provide clear guidance on the timing or pace of future hikes. However, many within the BOJ reportedly see scope for several additional increases. Board member Toichiro Asada, who dissented during the June rate hike, may do so again. The move signifies the BOJ's commitment to addressing inflation and gradually moving away from its long-standing ultra-loose monetary policy.