Japan yields rise as BOJ exits rate controls

Market-driven rates increase volatility and pressure banks and capital flows.

Japan’s 10-year government bond yield has surged to 2.23% early this year, marking a decisive break from its ultra-low rate era and testing bank resilience across Asia-Pacific, according to Harumi Taguchi of S&P Global Market Intelligence and Tetsuya Yamamoto of Moody’s Ratings.

The rise follows the Bank of Japan’s exit from yield curve control, allowing long-term rates to be set by the market “for the first time in over a decade,” Yamamoto said. The move reflects a combination of policy normalisation, persistent inflation, and global repricing of risk.

Taguchi said both monetary and fiscal policy are driving the increase. The central bank has raised rates since March 2024, whilst government spending plans are lifting bond issuance. This has raised concerns that “market is concerned about supply-demand conditions” as bond purchases are reduced and funding sources remain unclear.

The shift marks a structural break in Japan’s financial system. Yamamoto said the country has moved from “an era of administered interest rates to market-determined rates,” exposing markets to sharper movements and higher volatility as inflation expectations rise.

The impact extends beyond Japan. Higher domestic yields are likely to weaken long-standing carry trade strategies, where investors borrowed yen to invest abroad. Taguchi said investors may repatriate funds, increasing volatility in global financial markets as capital flows adjust.

Within the banking sector, risks are uneven. Japanese megabanks hold shorter-duration bonds of one to two years, limiting their exposure to rate changes. Regional banks, with bond durations of five to six years, face greater sensitivity, as longer-duration assets lose value more quickly when yields rise.

Despite this, Yamamoto said risks remain contained for now. Regional banks have reduced exposure and rely on stable funding, with “60 to 70% of regional banks’ yen deposits” coming from retail clients. This allows them to hold bonds to maturity and avoid realising losses unless liquidity conditions shift.

Rising yields are also lifting profitability. Banks can reinvest maturing assets at higher rates, supporting net interest margins. However, this comes with a trade-off, as unrealised losses on bond holdings may increase in a higher-rate environment.

As Japan transitions to market-driven rates, the balance between improved earnings and rising balance sheet risk is tightening. Further increases in yields could trigger capital outflows, heighten market volatility, and place additional pressure on banks’ asset valuations.