For more than a decade, Japan operated as an outlier in the global financial system. When central banks in North America and Europe raised borrowing costs to fight inflation, the Bank of Japan held its ground with yield curve control, pinning 10-year yields close to zero and anchoring short-term benchmarks in negative territory. Domestic insurers and regional lenders were forced to search for returns across foreign debt, buying Treasuries and European paper while absorbing steep currency hedging costs.
That regime has dissolved. Tokyo’s benchmark rates moved back into positive territory, and 10-year Japanese government bonds climbed past 1.1%, with 20-year and 30-year paper offering yields not seen since the late 2000s. The math behind cross-border capital changed overnight. Japanese institutions no longer need to accept expensive currency-hedged overseas debt when their own government paper provides respectable nominal yields on home soil.
International asset managers noticed the turnaround. With sovereign spreads narrowing globally, an institutional accumulation of $67 billion represents a clear bet that Japanese yields have adjusted enough to provide sustainable returns without imminent capital losses.
