Japan's Long-Term Borrowing Cost Hits Highest Level in Over a Decade

Japan's 40-year government bond yield — the interest rate investors demand to lend Tokyo money for four decades — rose to 1.750% on July 3, its highest in over ten years. Worries over Japan's heavy debt and a weak yen pushed long-term rates up. The trend since at least November 2025 looks permanent, not temporary.