Bank of Japan Raises Rates to 31-Year High

The Bank of Japan raised its benchmark interest rate by 25 basis points to 1.25% on September 18, 2026, marking the highest level since 1995. The decision passed in a 7-2 vote, intended to counter persistent inflation driven by AI investment demand and soaring energy costs resulting from the war in Iran. Despite the hike, the Japanese yen weakened, falling toward 158 per U.S. dollar, as investors viewed the split vote and Governor Kazuo Ueda's messaging as insufficiently hawkish.

Internal division characterized the decision, with board members Toichiro Asada and Ayano Sato dissenting. Both appointees of Prime Minister Sanae Takaichi argued that economic strength was insufficient and core inflation remained below the 2% target. This friction reflects a broader conflict between the Takaichi administration's preference for low rates to fund government spending and pressure from U.S. Treasury Secretary Scott Bessent, who urged Tokyo to take decisive action to support the yen.

Governor Kazuo Ueda signaled that the bank has entered a new policy phase focused on preventing underlying inflation from overshooting its target. He indicated that the bank remains open to further increases, including consecutive meetings or 50-basis-point jumps, to avoid the high-inflation scenarios seen previously in the U.S. and Europe. Analysts warn that continued tightening could trigger a global funding shock if Japanese investors repatriate significant holdings of U.S. Treasuries to seek higher domestic returns.