Japan’s government bond yields have surged to multi-decade highs, signaling a sharp shift toward more expensive borrowing. The 30-year JGB yield reached 4% — its highest level since the series began in 1999. Meanwhile, the 20-year yield climbed to 3.61%, the strongest since 1996, and the 10-year yield breached 2.66%, nearing its highest point in nearly 30 years.
War, Energy Costs, and Stubborn Inflation
The surge reflects mounting pressure from global geopolitical tensions — particularly the conflict in Iran — and persistent domestic inflation. Energy price spikes are now rippling across the broader economy, lifting transportation, production, and import costs. Japan’s wholesale inflation soared to 4.9% in April, the highest in three years. Import prices jumped 17.5%, driven largely by energy costs and yen weakness.
End of the Ultra-Low Interest Rate Era?
For years, the Bank of Japan (BOJ) maintained negative or near-zero interest rates, supporting growth with cheap money and massive bond purchases — a policy Bloomberg analysts describe as unprecedented in scale. Markets now widely believe that era is over. Investors are pricing in an imminent BOJ rate hike, possibly as early as June. A Reuters poll found around 65% of economists expect the BOJ’s key policy rate to rise from 0.75% to 1%. Some analysts forecast it could climb further — to between 1.5% and 2% by 2027.
A Global Domino Effect
This isn’t just a Japanese story. Bond yields are rising in tandem across major economies: In the U.S., the 30-year Treasury yield surpassed 5% for the first time since 2007, while the 10-year hovers near 4.5%. In the UK, 30-year gilt yields hit 5.7% — levels unseen in nearly 30 years. Across the eurozone, yields are also climbing steadily.
These synchronized increases are triggering broad concern. Higher yields mean:
- Greater cost of servicing public debt,
- More expensive business and mortgage loans,
- Downward pressure on stock valuations,
- Tighter liquidity in financial markets,
- Increased risk of economic slowdown.
Analysts warn the global economy is entering a new era of ‘expensive money’ — one where central banks can no longer rely on ultra-low or zero rates, as they did after the 2008 crisis and pandemic. Attention is now turning to the upcoming G7 finance ministers’ meeting in Paris, where soaring bond yields are expected to dominate discussions.