Bank of Japan raises rate to 1.25% as yen falls

Japan's central bank lifted its benchmark rate to a 31-year high, but a split vote and measured guidance sent the yen lower against the dollar.

Key points

The BOJ raised its uncollateralized overnight call-rate target from around 1.0% to around 1.25%, effective September 24.
The decision passed 7-2, with two board members arguing that current growth and inflation conditions did not justify a hike yet.
The yen weakened after the announcement as investors focused on the split vote and uncertainty over the pace of further tightening.

The Bank of Japan raised its benchmark policy rate by 25 basis points to around 1.25% on September 18, taking borrowing costs to their highest level in 31 years. The move extends Japan's gradual retreat from decades of ultra-low rates, but the yen weakened after the decision as traders weighed a split vote and the central bank's flexible language on what comes next.

What changed

The BOJ's Policy Board approved the new target for the uncollateralized overnight call rate by a 7-2 majority. According to the official decision, the guideline and the 1.25% rate paid on eligible current-account balances will take effect on September 24. The basic loan rate will rise to 1.5%. The bank also changed terms on its climate-related funding operation, moving the loan rate to a floating basis and adding lending limits.

Inflation risk drove the decision

The central bank said underlying consumer-price inflation is approaching its 2% stability target. It highlighted elevated producer-price growth, higher crude-oil costs, the weaker yen and stronger global demand linked to artificial intelligence. The BOJ also said firms are increasingly passing wage and wholesale-cost pressures into consumer prices. Even after the increase, it described financial conditions as accommodative and said real interest rates remain low, particularly across shorter maturities.

A divided board

Board members Toichiro Asada and Ayano Sato opposed the increase. The BOJ's account said Asada viewed recent core inflation below 2% and the economy's limited strength as reasons to wait. Sato argued that economic and price conditions had not accelerated enough to warrant an immediate move. That dissent matters because it makes the timing of another increase less predictable, even though the majority said rates should keep rising if activity, prices and financial conditions develop as expected.

Why markets reacted differently

A rate rise would normally support a currency by improving returns on local assets. This time, the yen fell to a two-week low near 158 per dollar, Reuters reported, as investors focused on the lack of a fixed timetable and resistance inside the board. The currency move also shows that the direction of U.S. and European rates, energy prices and expectations for future BOJ action can outweigh a single increase. Japanese equities advanced, with the Nikkei 225 gaining about 1.4%, according to the Associated Press.

Global implications

Japan's policy shift reaches beyond domestic borrowers. Investors have historically borrowed cheaply in yen to fund positions in higher-yielding assets, a strategy that becomes less attractive as Japanese rates rise. A disorderly reversal of those trades can amplify moves in bonds, equities and currencies. The adjustment is likely to remain gradual, however, because Japan's rate is still below comparable U.S. and euro-area benchmarks and the BOJ continues to call overall conditions supportive.

Who is affected and what remains uncertain

Higher short-term rates can lift funding costs for Japanese banks' customers, including businesses and variable-rate mortgage borrowers, while improving returns on some deposits and cash instruments. They can also influence global markets because the yen has long been used as a low-cost funding currency. The BOJ said it will judge the pace of further adjustments against the Middle East situation, energy prices, AI-related demand and foreign-exchange moves. Its next steps therefore depend on incoming wages, inflation and growth data rather than a predetermined schedule.

Sources

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Bank of Japan raises policy rate to 1.25% as yen weakens