Inflation remains an important backdrop. Consumer price growth has stayed above the central bank’s 2% target for 43 consecutive months. While that persistence supports the case for higher policy rates, it also magnifies the risk that elevated yields could further slow already fragile economic growth.
Fiscal Pressures Intensify
Rising yields translate directly into higher borrowing costs for the Japanese government, which carries the heaviest debt burden among advanced economies. Public debt stands at roughly 230% of gross domestic product, based on International Monetary Fund data. The fiscal strain is likely to grow as Prime Minister Sanae Takaichi advances the largest stimulus plan since the pandemic.
The supplemental budget calls for issuing ¥11.7 trillion in new debt, an amount 1.7 times larger than that raised under the previous administration’s 2024 measure. Analysts warn that balancing support for households with efforts to stabilize long-term finances will become increasingly difficult if yields continue climbing.
Options Under Consideration
The central bank faces two principal choices:
- Maintain the current path of gradual rate hikes. Continuing to tighten could reinforce the BOJ’s inflation-fighting credentials but risks pushing yields even higher, potentially undermining growth and complicating debt servicing.
- Reintroduce bond-buying measures or cut rates. A return to quantitative easing or a revived yield cap would seek to restrain yields and protect growth, yet could weaken the yen and amplify imported inflation pressures.
Currency dynamics are central to the debate. A softer yen would raise the cost of energy and food imports, items that have already contributed to persistent price pressures. Conversely, a stronger yen driven by rising domestic yields could trigger an unwinding of yen-funded carry trades, creating market volatility both in Japan and abroad.
Carry Trade Risks Remain Contained for Now
In August 2024, a surprise rate hike by the BOJ combined with weak U.S. economic data prompted a rapid unwinding of leveraged positions financed in yen. Global equity markets sold off sharply, and the Nikkei 225 Index fell 12.4% in its worst single session since 1987. The episode underscored the potential for Japanese monetary shifts to reverberate far beyond Tokyo.
Market participants currently see a repeat of that turmoil as unlikely. Strategists at major asset managers note that structural demand from pension funds, life insurers, and tax-advantaged retail investment accounts continues to anchor Japanese holdings of foreign securities. From January through October 2025, Japanese investors were net buyers of ¥11.7 trillion in overseas bonds, far exceeding the ¥4.2 trillion purchased in all of 2024. Lower hedging costs expected from further Federal Reserve rate cuts could extend that trend, limiting large-scale repatriation.
Economic Outlook at a Crossroads
The broader economy shows mixed signals. Domestic consumption has cooled as wage gains lag inflation, yet corporate investment remains supported by a weaker currency and improved pricing power. The government’s stimulus plan aims to cushion households from rising living expenses while encouraging private-sector spending. Success will hinge partly on the trajectory of borrowing costs and the BOJ’s ability to manage them.
Market watchers widely expect the central bank to proceed cautiously at its upcoming policy meetings. Any move to raise the policy rate again would likely be accompanied by assurances on market stability, while renewed bond purchases could be calibrated to avoid perceptions of a full policy reversal. With inflation still above target and fiscal demands increasing, the margin for error is narrowing.
For now, the sharp rise in long-dated JGB yields serves as a clear signal that investors expect tighter conditions ahead. Whether the BOJ reinforces that expectation or seeks to temper it will shape not only Japan’s recovery but also global capital flows in the months to come.
Crédito da imagem: Richard A. Brooks / AFP
