Rising Japanese bond yields have shifted from a benign policy normalization to a source of inflation risk. After the Bank of Japan scrapped negative rates in 2024, yields rose modestly, but this year they have surged as investors price in fiscal stimulus and external shocks. The trend reshapes equity valuations and corporate financing costs across the market. Investors recalibrate risk models accordingly across sectors.

Key drivers include expanded government spending on defense and infrastructure, and a sharp jump in oil prices after the Middle East conflict intensified. Higher input costs feed corporate profit margins, while a steeper yield curve pressures banks’ net interest margins. Foreign investors, attracted by higher returns, are reallocating from equities to bonds, tightening liquidity in the Nikkei. This pressure reshapes portfolio allocations among institutional players.

Market participants now watch the 10-year JGB benchmark for clues on policy drift and fiscal discipline. A continued rise could trigger bond sell‑offs, widening spreads and prompting the Ministry of Finance to intervene. For corporates, higher borrowing costs may delay capex projects, while exporters could benefit from a weaker yen. The yield trajectory will dictate short‑term market sentiment. Analysts warn of tighter credit conditions for small firms.