Investors have raised concerns that the Bank of Japan (BoJ) may risk losing credibility in the financial markets if it does not accelerate its pace of interest rate increases amid rising inflationary pressures. These concerns come as the yen recently dropped to a four-decade low, fueling speculation about the central bank’s future policy direction.

The BoJ is scheduled to hold its policy meeting tomorrow, where it is widely expected to maintain the current interest rate at 1 percent, following a quarter-point hike last month. Market participants will be closely watching for indications of whether the BoJ plans to quicken further rate increases, as traders in derivatives markets currently price in only one additional 25 basis point rise by January 2027.

This year, Japanese government bonds have experienced significant sell-offs, with 10-year yields climbing to near 3 percent, the highest level recorded this century. The yen weakened sharply, falling below ¥163 per US dollar for the first time since 1986. This decline has occurred despite official warnings of possible intervention to support the currency, highlighting the challenges facing policymakers.

Analysts attribute the sell-off to a combination of factors, including Japan’s exposure to high energy prices and expansive government spending plans. A planned long-term fiscal stimulus package exceeding $2 trillion, along with a proposed cut in the sales tax on food, have heightened concerns about sustained borrowing and inflation risks. Several investors warn that the BoJ’s previous verbal warnings have done little to stabilize the market, increasing calls for tangible policy action.

“The BoJ is already behind the curve and losing some credibility,” said Laura Cooper, global investment strategist at asset manager Nuveen. She pointed out that prior efforts to influence the market through official statements and limited currency interventions earlier this year were only temporarily effective.

However, the BoJ faces a delicate challenge in balancing the need to curb inflation without imposing excessive borrowing costs on households and businesses. Inflation data showing headline inflation rising from 1.5 percent in May to 1.7 percent in June—still below the BoJ’s 2 percent target—reflects the influence of energy subsidies that have softened price pressures. Core inflation also rose from 1.4 percent to 1.6 percent during the same period.

Political factors further complicate the BoJ’s policy path. The ascension of Sanae Takaichi to leadership of Japan’s ruling party last year, coupled with her pro-stimulus agenda, has put pressure on the central bank to maintain accommodative policies, a dynamic some investors describe as the “Takaichi trade.” Additionally, global factors such as the ongoing conflict in Iran have strengthened the US dollar and exacerbated challenges for the yen, given Japan’s energy dependence.

Some market participants remain skeptical about the BoJ’s willingness or ability to respond decisively. Peter Kinsella, head of investment services for the UK at UBP, described the mix of dollar strength and Japan’s energy vulnerabilities as a “toxic combination” for the yen, suggesting limited scope for faster monetary tightening. He expects more rhetoric around intervention but doubts more aggressive rate hikes will materialize soon.

Attention will focus on BoJ Governor Kazuo Ueda’s remarks in the post-meeting press conference, particularly on whether he reaffirms the bank’s independence from political pressures and signals a willingness to raise rates before a predetermined waiting period. Analysts see a confirmation of flexibility on timing as a key indicator of potential hawkish shifts.

Market consensus currently places the next possible rate increase in October, with a roughly 70 percent probability implied by derivatives. “If Ueda lays out a roadmap to an October hike, it would be a hawkish message,” said Osamu Takashima, a foreign exchange strategist at Citi in Tokyo, while noting the difficulty of providing clear guidance amid ongoing uncertainties.

The BoJ’s upcoming decisions and communications will therefore serve as a critical test of its commitment to addressing inflation and stabilizing financial markets.