The Bank of Japan rate hike that markets had been pricing as a near-certainty duly arrived, lifting the yen more than 2% against the dollar in a single session and pushing the currency to its strongest level in a month, at 155.57.
The Bank of Japan rate hike: what happened and what it means
The yen’s surge on Thursday followed a 0.9% gain the previous day, with sentiment driven by remarks from Bank of Japan board member Hajime Takata, who signalled the BoJ needed to move more ‘nimbly’. Markets moved before the decision was official. Reuters reports that the two-day BoJ meeting ending 18 September resulted in a rate rise to 1.25% from 1%, approved by a 7-2 vote, with board members Toichiro Asada and Ayano Sato dissenting.
That takes the BoJ’s policy rate to a 31-year high. It also edges the rate into the lower bound of the BoJ’s own estimated nominal neutral rate range of 1.1% to 2.5%, according to Reuters, which raises a question markets will spend the next several weeks trying to answer: how far does the Bank actually intend to go?
Takata’s influence on this outcome has been building for some time. Reuters previously reported that he was among two BoJ board members who voted against holding rates at 0.5% in September 2025, unsuccessfully proposing a hike to 0.75% alongside fellow hawk Naoki Tamura. His ‘nimble’ language this week was, by those standards, blunt. Citi agreed, writing in a note to clients: ‘(The) remarks are the strongest messaging we’ve heard from the board and reintroduces the idea of an expedited rate hike trajectory.’
It is worth recalling that the BoJ only lifted its short-term rate target to around 0.5% in January 2025, having judged that Japan’s economic activity and prices were, as a Takata speech at the time put it, ‘developing generally in line with the Bank’s outlook.’ Two years of grinding normalisation have brought the rate from sub-zero to 1.25%. The pace is quickening.
Nigel Green, chief executive of deVere, offered a blunter verdict on what the yen’s 2%-plus move in a day actually tells us about the current market environment: ‘Markets this jumpy don’t need a shock to move hard, a rumour is enough.’
Fed crosscurrents and the bond market backdrop
The yen’s move did not happen in isolation. Global bond markets have been rattled this week by a sell-off driven by fears that oil-price pressures will reignite inflation, and by mixed signals from the US Federal Reserve (Fed).
Fed chair Kevin Warsh used a speech at Jackson Hole last Friday to signal he remained determined to return inflation to the 2% target, warning the Fed would have ‘more to do’ if progress stalled. His decision to drop the Fed’s traditional ‘forward guidance’ on rate moves had already unsettled some investors before that.
Fed governor Christopher Waller then complicated the picture further. His 3 September speech on the Federal Reserve’s own website sets the Fed’s benchmark overnight rate at 3.50%–3.75% since December, describing it as ‘only slightly restricting aggregate demand.’ Waller told Reuters on Thursday he was leaning towards holding: ‘I’m going to paraphrase John Lennon here: give disinflation a chance. We can wait one meeting.’ His rationale, per the speech, was that late-July data showed ‘hints that disinflation may be starting,’ though he cautioned his future stance ‘will be heavily influenced by what we learn about August inflation.’
PBS News reports that, according to the Fed’s preferred inflation measure, US inflation stood at 3.7% year-on-year in the month prior to Waller’s remarks, still well above the 2% target. Waller’s conciliatory tone sent the dollar lower against the yen, the pound, and the euro.
Meanwhile, 10-year UK gilt yields hovered around 5.1% in Thursday morning trading, having touched close to 5.3% earlier in the week, the highest since 2008. Japan’s vice-finance minister for international affairs, Atsushi Mimura, said he was ‘neither satisfied nor reassured’ by recent currency moves and that policymakers ‘remain on a state of heightened alert.’ Reuters also reports that US Treasury Secretary Scott Bessent voiced support for ‘decisive’ monetary steps to combat yen weakness in a meeting with BoJ Governor Ueda that month.
With the BoJ’s rate now inside the lower bound of its own neutral range and the Fed divided on whether to hold or hike, the September meeting of US rate-setters becomes the next live moment. August inflation data, due before that gathering, will determine whether Waller’s patience survives contact with the numbers.
