Higher rates, and the split in Japan's household balance sheet

The Bank of Japan's move to a 1 percent policy rate, its highest in 31 years, is changing where Japanese households keep their money. Higher yields are pulling retail savings toward corporate bonds and lifting interest income toward levels last seen in the 1990s, while the same rates raise the cost of carrying a mortgage.

The normalization, in the Bank's own words

The direction is set by the central bank itself. In its Semiannual Report on Currency and Monetary Control submitted to the Diet in June, the Bank of Japan said that with real interest rates at significantly low levels it would continue to raise the policy rate as economic activity and prices improve, toward its 2 percent price stability target. The path is visible in the rate itself. The uncollateralized overnight call rate sat around 0.5 percent until the December 2025 meeting, moved to around 0.75 percent after it, and reached 1 percent at the June 2026 meeting, the highest in 31 years. Underlying inflation, measured by consumer prices excluding fresh food, ran around 2.5 to 3.0 percent for much of the period before easing below 2 percent late in it as government energy measures took hold, while inflation expectations kept rising. The Bank's total assets stood at 663.0 trillion yen at the end of March, down 9.1 percent on the year.

Retail money moves into corporate bonds

Retail bond issues from large Japanese borrowers have been clearing within hours of opening. SoftBank Group and Rakuten Group have placed issues aimed at individuals, with lots priced from around 100,000 to 1,000,000 yen, that sold out on the day. The draw is yield. Many corporate bonds now carry coupons near 2 percent, against roughly 0.3 percent on ordinary deposits, and SoftBank Group's seven-year paper yielded about 2.8 percent in 2022 and about 3.9 percent in 2025. Retail-targeted corporate bond issuance reached about 2.7 trillion yen in the fiscal year to March 2026, up about 14 percent year on year and a second straight record, according to INDB data. The aggregate picture matches it: the Bank of Japan reported the outstanding amount of CP and corporate bonds rising around 7.0 to 7.5 percent year on year, supported in part by past large issuance, with bank lending up around 4.5 to 5.5 percent.

Household interest income rebuilds

The shift is visible in household income. Interest and dividend income reached about 34 trillion yen in 2025, close to the 1994 peak, according to the Cabinet Office. During the negative-rate years around 2020 the same income ran roughly 30 percent below the 1994 level. Interest and dividend income has risen to around 10 percent of household disposable income, from a range of 6 to 8 percent before the tightening cycle began. Banks are competing for the money. Sumitomo Mitsui Trust Bank raised its online five-year time deposit rate to 1.7 percent in June, among the highest offered domestically, and its time-deposit balances grew by about 120 billion yen in under three months.

The cost side and the distributional split

The asset side gains from higher yields. Households carrying floating-rate debt face the reverse, as borrowers who took mortgages when rates were near zero now see payments rise with reference rates. The burden sits most heavily on younger, leveraged households. Debt held by people under 30 rose to about 14.67 million yen in 2025, a record and roughly double the level of five years earlier, against a national average near 6.75 million yen, according to the Ministry of Internal Affairs. With the Bank of Japan signaling further increases, analysts at the Japan Research Institute have said the gap between households that hold assets and those that carry debt will keep widening as the cycle runs.