TOKYO — Japanese government bonds sold off again Thursday, extending a Japan bond rout that has pushed super-long yields to record highs and unnerved investors. The move has been driven by fears that Prime Minister Sanae Takaichi’s Feb. 8 snap-election campaign — built around tax cuts — could increase borrowing needs just as the Bank of Japan is shrinking its market footprint, Jan. 22, 2026.
Thirty-year yields surged 27 basis points Tuesday to an all-time high of 3.88% before easing after Finance Minister Satsuki Katayama urged calm. The BOJ ends a two-day policy meeting Friday, with traders watching for any hint that officials will lean against volatility at the long end.
Japan bond rout: the decisive playbook taking shape
Officials have levers to pull, but each comes with trade-offs for the yen, inflation expectations and the BOJ’s commitment to unwinding a decade of stimulus. A Reuters explainer of Japan’s policy options highlights a short list that keeps resurfacing in dealer conversations:
Taper pause: The BOJ could slow the pace of its bond-buying reduction to shore up demand. “At some point there will be question marks as to whether the Bank of Japan can continue to run off its holdings,” said Ian Samson, a multi-asset portfolio manager at Fidelity International.
BOJ “twist”: Without expanding total purchases, the central bank could tilt buying toward super-long maturities while trimming shorter-tenor buying — a Japan-style “Operation Twist” designed to flatten a curve that has steepened in the Japan bond rout.
Supply relief: The Ministry of Finance can adjust auction sizes for 20-, 30- and 40-year bonds, and has also discussed buybacks of older low-coupon debt to ease pressure at the long end.
Opposition lawmaker Yuichiro Tamaki has urged authorities to act swiftly, saying, “The government and the Bank of Japan should respond decisively to excessive market moves,” in remarks to Reuters.
GPIF shift: the sleeper catalyst
Another swing factor is the Government Pension Investment Fund, the world’s largest public pension, with assets around 260 trillion yen. A shift toward domestic bonds — and away from foreign bonds — could provide large, price-insensitive demand for Japanese government bonds, and potentially support the yen at the same time.
The baseline, however, is stability. GPIF’s policy asset mix keeps target allocations at 25% each for domestic bonds, foreign bonds, domestic equities and foreign equities. That makes any post-election change, even at the margin, a bigger signal than a routine rebalance.
Continuity check: pressure has been building for months
The Japan bond rout is colliding with a longer-running transition away from heavy central bank support. In March 2025, the BOJ began cutting purchases of super-long bonds for the first time under its taper plan, Reuters reported. In June 2025, the Ministry of Finance revised its issuance program and deepened cuts to super-long sales after a market selloff, according to a June 2025 Reuters report. In December 2025, Japan approved an issuance plan that reduced super-long issuance to its lowest in 17 years, as outlined in a December 2025 Reuters report.
On the central bank side, the BOJ has already mapped out a slower taper beyond March 2026. Its June 2025 policy statement set quarterly cuts of about 400 billion yen through January-March 2026, then about 200 billion yen from April-June 2026.
Fiscal clarity may be the most powerful tool
Markets say the cleanest way to steady the Japan bond rout may be political reassurance: credible funding plans that convince buyers the tax-cut pitch will not translate into a lasting erosion of fiscal discipline. Japan’s latest fiscal projections show a wider primary deficit and warned that suspending the 8% food tax for two years would cost about 5 trillion yen ($32 billion) a year, according to a Reuters report on the revised fiscal outlook.
For now, investors will be watching Friday’s BOJ messaging, upcoming auctions and whether election campaigning ahead of Feb. 8 produces any detail that can halt the Japan bond rout without forcing the central bank back into aggressive bond buying.
