Japanese Banks and Insurers Ramp Up JGB Buybacks as Net Foreign Bond Sales Hit Over Two-Decade High
nashnova research
Japan's major banks and insurers bought a net ¥5.4 trillion in JGBs over five months while foreign-bond net sales hit their highest since 2005 — surging domestic yields are redrawing the map of global capital flows.
What happened?
From April to August, Japan's large banks and insurers bought a net ¥5.4 trillion (≈$34 billion) in JGBs maturing in two-plus years — the biggest net purchase over any comparable span since early 2023.
In September alone, banks' net sales of foreign bonds rose to ¥2.5 trillion; for the first three quarters of 2026, foreign-bond net selling has already exceeded any year since 2005.
This means → Japanese institutional money is doing two things at once — loading up on JGBs and offloading foreign debt — in the same direction and at rare intensity.
Why is the money coming home now?
The core driver is the sharp rise in JGB yields: the 30-year yield surged from under 2.3% early last year to a record 4.27% this month; the 10-year hit a 30-year high.
The Bank of Japan's policy rate sits at its highest in 31 years, and markets increasingly expect positive rates to persist.
In plain terms = Japanese government bonds can finally offer a decent return, so institutions no longer need to go abroad to chase yield.
Currency-hedging costs — the premium Japanese investors pay to lock in exchange rates on foreign holdings — keep climbing, further eroding the relative appeal of overseas debt.
How does the market read this?
Chris Scicluna, head of European research at Daiwa Capital Markets, said JGB yields "have returned to a level that allows Japanese investors to keep their money at home."
Masahiko Loo, senior fixed-income strategist at State Street Global Advisors, argued that the credibility of BOJ policy normalization helps anchor expectations of sustainably higher JGB yields — "JGBs are becoming a serious contender in the global competition for capital."
This reflects a forming consensus: JGBs are no longer a "zero-yield asset" but a real option in global allocation.
Is the money actually moving from foreign bonds into JGBs?
Stephen Spratt, rates strategist at Société Générale, noted that the signal on banks cutting foreign-bond exposure is clear, but their JGB buying is not yet significant enough to confirm a direct switch.
He cited BOJ data showing large-bank lending grew 7.9% year-on-year in August — This means → for banks, lending is still more profitable than buying JGBs, so domestic bonds are not yet their first choice.
Pensions show no broad pivot either: pension funds have been net buyers of ¥11.4 trillion in foreign long-term bonds this year, and their trading pattern remains largely mechanical.
What does this mean for global bond markets?
Scicluna warned that the U.S. and European economies such as France have long been the main beneficiaries of Japanese investors chasing overseas returns.
In plain terms = Japan is one of the world's largest "offshore bond buyers." Whoever it stops buying from loses a steady source of demand.
Most advanced economies now expect to run their widest fiscal deficits since 2021 — This means → the scale and pace of Japan's capital repatriation could weaken support for these markets precisely when they need foreign buyers most, making it a critical variable for global bonds.
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