Japan’s sovereign bond market is under strain as the benchmark 10-year Japanese government bond yield approached 3% for the first time since the mid-1990s, testing the government’s fiscal strategy and debt sustainability.
The yield hit a three-decade high of 2.945% on Tuesday before easing to around 2.89% on Wednesday, reflecting rising investor concerns over Japan’s ability to control inflation. The Bank of Japan’s long-standing 2% inflation target remains elusive, with real growth estimates capped near 1%, according to government projections. The Ministry of Finance estimates real GDP growth at 0.9% in the current fiscal year ending March 2027, followed by 1.1% in the subsequent year.
The surge in yields is amplifying fiscal risks. The government has set aside 31 trillion yen ($195 billion) for debt-financing costs in the current budget. Under a baseline scenario assuming the 10-year yield climbs to 3.6% by fiscal 2029, debt-servicing expenses could rise to 41 trillion yen, a more than 30% increase. The yen remains weak at 159.32 yen per dollar, adding to import-cost pressures.
Policy makers face limited tools to stabilize the market. Analysts suggest irregular adjustments to bond issuance could help curb yield rises, but broader fiscal and geopolitical factors continue to drive inflation. Naomi Muguruma, chief bond strategist at Mitsubishi UFJ Morgan Stanley Securities, noted that market doubts over the government’s resolve to combat inflation have become the central risk for JGB traders. Sanae Takaichi, Japan’s prime minister, has yet to outline a comprehensive response to the bond market turbulence.
Strategists warn that without decisive action, Japan’s fiscal plans could face significant strain. Mari Iwashita, executive rates strategist at Nomura Securities, highlighted the challenge of anchoring inflation amid persistent price pressures, comparing the current environment to the previous oil shock. Ataru Okumura, chief rates strategist at SMBC Nikko Securities, suggested that adjusting bond issuance timing might provide temporary relief, but long-term solutions remain unclear.
The Ministry of Finance is scheduled to hold a regular meeting with investors next month, where fiscal and monetary policy coordination will likely be a key topic. The outcome of these discussions could determine whether Japan can avert a deeper fiscal crisis driven by rising borrowing costs.
