Japanese government bond yields have recently surged to their highest levels in decades, intensifying volatility in the bond market and compelling the Bank of Japan (BOJ) to reconsider its quantitative tightening trajectory.
According to informed sources, the BOJ will hold a policy meeting on June 15-16 to assess its current bond reduction plan and formulate a new framework for the 2027 fiscal year. The sources indicated that, against a backdrop of ongoing Middle East tensions unsettling bond markets, pausing the balance sheet reduction has become an increasingly favored option. "Markets remain volatile; there's no need to rush forward," one source was quoted as saying.
The yield on the benchmark 10-year Japanese Government Bond (JGB) reached 2.8% last week, a 30-year peak, approaching the 3% reference line set by the Ministry of Finance for compiling the FY2026 budget. Breaching this threshold would significantly increase government debt servicing costs, further constrain fiscal space, and directly challenge Prime Minister Takachiho's agenda of tax cuts and expanded spending.
This deliberation comes as the BOJ faces intertwined pressures: bond market turbulence, rising political demands, and the difficult balancing act of potentially raising interest rates concurrently in June. Market participants and former central bank officials widely see a pause in balance sheet reduction as reasonable, yet it raises questions about the BOJ's commitment to its monetary normalization path.
**Yield Surge Triggers Fiscal Alarms**
Persistent concerns over Japan's fiscal health, coupled with rising inflation pressures, have driven the rapid ascent in government bond yields. The 10-year JGB yield's climb to a 30-year high of 2.8% last week brings it perilously close to the Finance Ministry's 3% reference point for FY2026.
Former BOJ official Nobuyasu Atago noted, "We are seeing yields rise quite rapidly, making it difficult for investors to buy bonds, and the Ministry of Finance is likely beginning to worry." He added, "Given the political headwinds, I see no reason for the BOJ to continue balance sheet reduction into the next fiscal year."
Sources also emphasized that "the last thing authorities want is for JGB yields to rise." Should yields surpass 3%, the Japanese government's debt servicing costs would swell further, tightening an already constrained fiscal space.
**Balance Sheet Reduction Plan Under Pressure to Pause**
The BOJ initiated its quantitative tightening plan in 2024, a key component of Governor Kazuo Ueda's strategy to unwind a decade of ultra-loose monetary stimulus. Under this plan, the central bank has been gradually reducing its bond purchases, currently cutting monthly buying by 200 billion yen per quarter. The BOJ's current JGB holdings stand at approximately 500 trillion yen.
According to two sources familiar with internal discussions, while a final decision has not been reached, pausing the balance sheet reduction is becoming the preferred option. Market reports are widely viewed as credible policy signals.
A recent BOJ survey showed some investors explicitly calling for a halt to the bond-buying reduction, highlighting the practical challenges the central bank faces in shrinking its massive JGB portfolio. Notably, even if the reduction plan is paused, the BOJ's balance sheet has already contracted by about 20% from its late 2023 peak as existing bonds mature and roll off, a process that will continue.
**Political Pressure Amplifies Policy Resistance**
Political factors are also significant. Since taking office, Prime Minister Takachiho has publicly committed to funding tax cuts and increased spending through more bond issuance, creating greater resistance to the BOJ's reduction plan. This policy stance in the world's most indebted major economy has fueled investor concerns over fiscal sustainability, becoming a key driver behind rising yields.
Akira Otani, a former BOJ executive now at Goldman Sachs Japan, stated, "When inflation risks from the Middle East conflict and the government's proactive fiscal stance simultaneously exert upward pressure on JGB yields, continuing balance sheet reduction could spark political friction by pushing yields even higher."
Sources acknowledged that political considerations are an unavoidable backdrop for BOJ decisions, and the rapid rise in yields has made the policy maneuvering room increasingly narrow.
**The Policy Mix: Rate Hikes vs. Balance Sheet Reduction**
Beyond pausing balance sheet reduction, markets see a high probability the BOJ will raise its short-term policy rate from 0.75% to 1% at its June meeting. Mari Iwashita, chief rates strategist at Nomura Securities, views "a combination of pausing balance sheet reduction and raising rates as a preferable policy mix" – the former helps alleviate upward pressure on yields, while the latter addresses concerns that the BOJ is lagging in tackling inflation risks.
She predicts the BOJ will pause its reduction plan in FY2027, noting, "Given how unstable the bond market is, it's natural for the BOJ to take a cautious stance to avoid unnecessary market turmoil."
The BOJ has consistently maintained that its balance sheet reduction plan is independent of its monetary policy stance. However, if the central bank pauses reduction while raising rates, this distinction becomes more nuanced, increasing the difficulty for markets to interpret the consistency of its policy framework.
Japan's situation is not unique. Years of massive asset purchases have swollen the balance sheets of major central banks, and now shrinking these holdings is universally meeting resistance. In the United States, analysts are skeptical about whether the new Federal Reserve Chair, Kevin Warsh, can advance his goal of reducing the balance sheet, given diminished market appetite for U.S. Treasuries.
The BOJ's next clear signal will come next week when it releases the minutes of its meetings with bond market participants held on May 21-22, which markets will scrutinize for the latest clues on adjustments to its reduction path.