What a 1.25% BOJ Policy Rate Would Mean for Japan

A Bank of Japan policy rate of 1.25% would not look high beside many other major economies. In Japan, however, the number carries unusual weight. The BOJ currently guides the uncollateralized overnight call rate at around 1.0%, and its next Monetary Policy Meeting is scheduled for September 17–18. Reuters reported on September 11 that the Bank was likely to raise the rate by 25 basis points to 1.25%, a level the news agency described as the highest in 31 years. But as of September 14, that is an expectation, not a BOJ decision. The official target remains around 1.0%.^{[1] [3]}

The important question is not simply whether the BOJ moves by a quarter point. It is how that move would travel through an economy that spent years with interest rates close to zero or below it. Mortgage payments would not all reset by exactly 0.25 percentage point the next morning. Deposit rates would not necessarily rise by the same amount. Corporate lending rates, government-bond yields and the yen would not move one-for-one with the policy rate. Yet a move to 1.25% would reinforce a much larger structural change: money in Japan once again has a visible price over time.

From negative rates to 1% — in barely two and a half years

The path matters. In March 2024, the BOJ ended the negative interest-rate policy and yield-curve control framework that had defined Japanese monetary policy for years. It shifted back to using the short-term interest rate as its primary policy tool and set the uncollateralized overnight call rate at around 0 to 0.1%.^[4]

Normalization then accelerated. In December 2025, the BOJ raised the target to around 0.75%. In June 2026, it raised it again to around 1.0%, with the decision passing by a 7–1 vote. The rate applied to the complementary deposit facility also became 1.0%, while the basic loan rate rose to 1.25%. The Bank held the policy rate steady in July, but its July Outlook Report said that, if the economic and price outlook develops as expected, it would continue raising the policy rate and adjusting the degree of monetary accommodation.^{[5] [6] [2]}

That history is why 1.25% is more than “just” another 25 basis points. An economy that still had a policy rate near zero in spring 2024 would be operating in the low-1% range only about two and a half years later. Expectations of what comes next may matter almost as much as the level itself.

Mortgages: the impact arrives through contract terms

For households, mortgages are the most visible transmission channel. But variable-rate mortgage products differ in benchmark rates, discount margins, reset dates and repayment-adjustment rules. A 25-basis-point BOJ hike does not mean every floating-rate borrower immediately pays exactly 0.25 percentage point more.

Still, the direction of pressure is clear. As a simple illustration, a 0.25-percentage-point increase in borrowing cost equals an additional ¥25,000 a year for every ¥10 million of outstanding principal, before taking account of amortization, repricing lags or product-specific rules. On ¥30 million, that arithmetic becomes ¥75,000 a year. It is not a forecast of any specific mortgage payment, but it shows the scale of the change.

Savers are on the other side of the ledger. If banks pass higher rates into ordinary and time deposits, cash that produced almost no return for years starts paying again. The pass-through, however, is not uniform. Lending rates and deposit rates can move at different speeds, which is why a policy-rate increase cannot be described simply as a 25-basis-point loss to households.

Corporate credit: a quarter point can matter more to smaller firms

For companies, the policy rate works through banks’ funding costs and loan pricing. BOJ data show that in July 2026 the average contracted rate on new lending by domestically licensed banks was 1.706% overall, with short-term lending at 1.388% and long-term lending at 1.895%. The corresponding overall average for shinkin banks was 2.194%. These are averages; actual terms vary widely with credit quality, collateral, maturity and whether the rate is fixed or floating.^[7]

A BOJ move to 1.25% would therefore not add exactly 25 basis points to every corporate loan. But firms that repeatedly refinance working capital or take out new variable-rate loans would feel repricing relatively quickly. For a large company with thick margins and ready access to bond markets, that may be manageable. For smaller firms already facing higher wages, materials and energy costs, another increase in financing expense can be much more consequential.

There is a second side to this story. A clearer price for capital can force companies to distinguish more sharply between productive investment and projects that only made sense under near-zero funding costs. Over time, that can improve capital allocation. The risk is that the same discipline arrives too quickly and suppresses investment before productivity gains emerge.

Banks: higher net interest income, but more bond pain

Rising rates have already helped Japanese banks in one important way. In its review of fiscal 2025 bank results, the BOJ said core profitability improved across major banks, regional banks and shinkin banks, helped by higher net interest income as yen interest rates rose. At the same time, losses on bond sales weighed on earnings.^[8]

The April Financial System Report tells the same two-sided story. Banks’ underlying profitability has improved, while valuation losses on yen-denominated bonds have increased as rates rose. The BOJ nevertheless assessed banks’ yen interest-rate risk relative to capital as low overall and said the banking system had sufficient loss-absorbing capacity.^[9]

A move to 1.25% would therefore improve some lending margins while increasing the challenge of managing securities portfolios, deposit competition and borrower credit risk. If long-term yields rise sharply as well, mark-to-market pressure on bond holdings could become more visible.

The yen: a rate hike can support it, but the link is not mechanical

Currency markets are one reason the September decision matters far beyond Japan’s banks. In theory, higher Japanese rates narrow the yield gap with overseas markets and reduce the appeal of borrowing yen to buy higher-yielding assets abroad. Reuters reported on September 8 that expectations of tighter BOJ policy were already contributing to an unwind of yen-funded carry trades.^[12]

But currencies do not trade on one rate alone. U.S. and European policy, oil prices, geopolitical risk, intervention expectations and global risk appetite all matter. If a 25-basis-point hike is already fully priced, the yen could react more to Governor Kazuo Ueda’s explanation of the next move than to the move to 1.25% itself.

The BOJ does not target the exchange rate, but the yen matters because it affects import prices. The July Outlook Report said consumer inflation would move clearly above 2% in the second half of FY2026 because of factors including higher crude oil prices, rising semiconductor prices linked to AI demand and the effects of yen depreciation. The Policy Board’s median projection for core CPI was +2.5% in FY2026, +2.4% in FY2027 and +2.0% in FY2028.^[2]

Public finances: the effect is slow, but the numbers are enormous

Higher interest rates also make Japan’s fiscal arithmetic more demanding. Ministry of Finance budget material puts FY2026 interest payments at ¥13.0 trillion, up from ¥10.5 trillion in the FY2025 initial budget. The FY2026 budget calculation uses a 3.0% assumed 10-year government-bond rate. That is not the same as the BOJ’s 1.0% policy rate, and a move to 1.25% would not mechanically lift the 10-year yield by 25 basis points.^[10]

Still, the MOF’s sensitivity analysis illustrates why sustained higher yields matter. If rates used in the projection were 1 percentage point above the baseline from FY2027 onward, national debt service would rise by about ¥0.8 trillion in FY2027, ¥2.1 trillion in FY2028 and ¥3.8 trillion in FY2029. Existing fixed-coupon debt means the hit arrives gradually as bonds mature and are refinanced at higher rates. The BOJ policy rate and that MOF long-rate scenario are not equivalent, but both point to the same mechanism: higher borrowing costs accumulate over time.^[10]

Why raise again now?

The case for another hike is not based on inflation alone. The economy has not fallen into a sharp contraction. The Cabinet Office’s second estimate, released September 8, put real GDP growth in April–June 2026 at 0.4% quarter on quarter, or 1.4% annualized. Domestic demand, however, fell 0.1% quarter on quarter, showing that the expansion is not uniformly strong.^[11]

In its July outlook, the BOJ projected real GDP growth of 0.6% in FY2026 and 0.8% in each of FY2027 and FY2028. It described the economy as continuing moderate growth while warning that underlying inflation could overshoot the 2% price-stability target. The policy challenge is therefore to reduce excess accommodation without choking off the wage-demand cycle the Bank spent years trying to create.^[2]

For Japan, 1.25% is less a “high rate” than a change in the operating system

For decades, low interest rates became part of the architecture of Japanese economic life. Companies learned to borrow cheaply. Households stopped expecting meaningful interest on deposits. The government refinanced a vast stock of debt at exceptionally low cost. Even 1.25% would remain modest by international standards, but the institutions and behavior built around near-zero rates make the shift unusually consequential.

The BOJ has not yet decided what it will do on September 18. The more important point is that the economy is already looking beyond the next quarter point. Mortgage borrowers, treasurers, banks, currency traders and fiscal planners are all asking the same question: if 1.25% is not the end, what comes after it? Japan’s return to positive interest rates is not a single policy announcement. It is the process of relearning how an economy behaves when money has a price again.