• Bank of Japan (8301.T) Governor Kazuo Ueda describes the recent surge in long-term interest rates as "notably rapid."
  • The BOJ stands ready to take prompt measures, including increasing government bond purchases, if market moves become disorderly.
  • Ueda's comments underscore the central bank's delicate balancing act between normalizing policy and containing bond-market volatility.

Bank of Japan Governor Kazuo Ueda flagged that long-term interest rates are climbing at a "notably rapid pace," signaling the central bank's heightened vigilance as it navigates a path away from years of ultra-loose policy. Speaking on Tuesday, Ueda said the BOJ would respond swiftly if the rise in yields becomes disorderly, including through closer coordination with the government and potential increases in bond purchases, according to people familiar with the matter.

"The recent increase in long-term rates has been somewhat rapid," Ueda said, echoing concerns from earlier this month. He added that the BOJ is prepared to act decisively should market functioning be impaired. The remarks come as Japan's 10-year government bond yield touched fresh multi-year highs, reflecting investors' expectations of further policy tightening amid firmer inflation and growth.

The BOJ has long sought to control the yield curve through massive bond buying, but it is now gradually allowing rates to rise as part of a normalization process. However, the speed of the move has rattled markets. "We are seeing a test of the BOJ's resolve," said a Tokyo-based fixed-income strategist. "Investors want to know how high yields can go before the central bank steps in."

Ueda's comments highlight the central bank's effort to maintain orderly market conditions while weaning the economy off decades of near-zero rates. The government, which faces politically sensitive debt-service costs, has also voiced concern. An official at the Ministry of Finance said they are "in close communication with the BOJ to ensure stability."

This is not the first time Ueda has warned about rapid yield moves. In late 2025, he noted similar concerns as markets repriced amid shifting inflation expectations. For now, the BOJ's stance is a reminder that while it is moving toward normalization, it remains on guard for any abrupt disruption.

Correction: An earlier version of this article misstated the timing of Ueda's remarks. They were made on Tuesday, not Wednesday.