Japan’s Long-Term Interest Rates Surge Amid Tax Cut Concerns

Japan's long-term interest rates have been steadily rising since the beginning of 2026, with a potential increase above 3% for the first time in 30 years. This surge in rates is largely due to concerns over the government's fiscal health and its plan to cut the consumption tax on food from 8% to 1% starting April 2027. The long-term interest rate, which refers to the yields on 10-year Japanese government bonds, serves as a benchmark for lending rates to businesses and mortgage rates.

The rise in these rates, reflecting a decline in government bond prices, recently hit a 30-year high of 2.930% on August 17. Prime Minister Takaichi Sanae's decision to implement the tax cut and distribute cash payouts has raised fears about filling a potential annual funding shortfall of up to ¥5 trillion. The rate could potentially reach the 3% range by August, according to some market observers.

The rise in long-term interest rates is also influenced by concerns about deteriorating fiscal health and rising inflation. Prime Minister Takaichi has promised to restore the tax rate to 8% in 2029, but this could be politically challenging ahead of an upper house election in 2028. The Bank of Japan's cautious approach to rate hikes and its recent decision to leave the policy rate unchanged has further fueled concerns about inflation, contributing to the upward pressure on long-term interest rates.