Japan’s government bond market is back in focus after a sharp move higher across the long end of the curve. The 40-year Japanese government bond yield climbed to 4% for the first time on record, while the 10-year yield moved above 2.3%, its highest level in 30 years. The 20-year yield was around 3.35%, and the 30-year stood near 3.70%, also at elevated levels.
The yield curve is sending a clear warning
Short-dated bonds are telling a different story. Yields on 1-month, 3-month, and 6-month paper remain below 1%, staying close to the Bank of Japan’s 0.75% policy rate. That widening gap between short and long maturities suggests investors are demanding more compensation for future borrowing costs, inflation risk, and fiscal uncertainty. In simple terms, the market is asking for a higher return before lending money to the government for decades.
That shift matters beyond the bond market itself. Higher yields raise the government’s financing costs, and they can also feed through to borrowing costs for businesses and households.
Fiscal concerns and BOJ policy changes are driving the move
The report points to several factors behind the rise in yields. Prime Minister Sanae Takaichi has proposed cutting the food sales tax to 0%, a move that has raised concern over government debt because no clear funding source has been outlined to offset the lost revenue. She has also called an election for February 8, and investors expect her party could gain more power, a scenario tied to expectations of higher spending and more borrowing.
The Bank of Japan is another major factor. It has moved away from the ultra-loose stance that defined Japanese policy for years: negative rates ended in 2024, bond purchases have been reduced, and the policy rate was lifted to 0.75% in December 2025, the highest level in 30 years. With the BOJ no longer holding down long-term yields to the same extent, pressure has become more visible across the curve.
Why crypto markets are watching Japan
The move in Japanese yields is not just a domestic story. Higher yields in Japan can reduce yen carry trades, where investors borrow cheaply in yen and deploy capital into other markets. That can increase volatility globally, and the source article notes that risk assets such as Bitcoin and altcoins may face short-term pressure.
At the same time, some market participants view rising debt and inflation risks as supportive for assets like Bitcoin over a longer horizon, given its role in some portfolios as a hedge against weakness in traditional currencies. For now, the bond market move stands as a clear repricing of Japan’s fiscal, political, and monetary outlook.