Japan Bond Auction Faces Scrutiny as Yields Reach Three-Decade High

Japan's bond auction on Tuesday faces scrutiny as yields rise to a three-decade high, testing investor appetite and putting pressure on Prime Minister Sanae Takaichi's record spending plans.

The 10-year Japanese government bond (JGB) yield has climbed to 2.95%, not seen since September 1996, while the 2-year yield reached a 31-year high of 1.75% and the 5-year set a fresh record of 2.21%. This increase in yields is driving up funding costs for Japan and global bond markets.

Investors are gauging whether yields have further room to rise, with some experts predicting a continued upward trend. Yusuke Matsuo, senior market economist at Mizuho Securities, noted that it would be hard to actively bet on the 10-year bonds due to various cues putting upward pressure on JGB yields.

The Ministry of Finance expects debt-servicing costs to rise 17% to a record 36.64 trillion yen ($230 billion) in the next fiscal year, reflecting an increase in the assumed interest rate to a 29-year high of 3.8%. Prime Minister Takaichi has aimed to cap bond issuance to around 40 trillion yen for the fiscal 2027 budget, seeking to reassure investors about record spending and tax cuts.

The rise in yields may act as an enticement when the Ministry of Finance sells about 2.6 trillion yen in 10-year bonds on Tuesday, but demand has been weak in the past two auctions due to expectations of further increases in yields.