Japan Bond Rout Threatens Fiscal Plans Amid Inflation Concerns

Japan is facing a bond rout that could push debt financing costs above government estimates, putting Prime Minister Sanae Takaichi's ambitious spending agenda at risk. Analysts say the tools available to calm markets are limited and may only provide temporary relief.

The global bond selloff has found its epicenter in Japan, with the benchmark 10-year yield on the brink of hitting 3% for the first time since the mid-1990s. This surge is driven by investors' growing concerns about Japan's towering debt pile and inflation risks stemming from the Middle East war.

The Bank of Japan has warned of the risk of an inflation overshoot that could warrant an early rate hike, which would further fuel a repricing across bond markets. Analysts say yields will remain under upward pressure unless the government rethinks its reliance on subsidies and tax cuts to ease cost-of-living pain.

Ataru Okumura, chief rates strategist at SMBC Nikko Securities, suggests that an adjustment to bond issuance could help curb yield rises, while a source familiar with the BOJ's thinking believes it may need to ramp up bond-buying in emergency market operations if the situation worsens.