The Bank of Japan is facing its most urgent pressure to raise interest rates since exiting its ultra-easy policy in 2024.
According to a Reuters report on August 14, three sources familiar with the BOJ's internal discussions revealed that the bank may raise rates as early as September and is considering accelerating the pace of tightening thereafter, exceeding the current pace of about twice a year.
One source stated bluntly: "An earlier rate hike is now in sight." Another source said: "The BOJ may also accelerate the pace of rate hikes."
This signal means the September 17-18 policy meeting will become a key node. Markets have now priced in the probability of a September hike at nearly 80%.
From 'Twice a Year' to 'Quarterly'
Since exiting a decade-long ultra-easy stimulus policy in 2024, the BOJ's rate hike pace has been about twice a year. In June this year, it raised its key rate to 1%, a 31-year high.
If it raises rates in September as expected, Reuters cited some analysts as saying, room for another hike in December would open up. This would bring the total number of hikes for the year to three, reinforcing market expectations for a "quarterly rate hike."
Last month's joint Japan-U.S. intervention to support the yen, along with pressure from U.S. Treasury Secretary Bessant, has further focused market attention on how the BOJ will respond to persistent yen weakness. Raising interest rates itself is a policy tool to support the yen—higher rates typically attract capital inflows, providing support for the currency.
Inflation Pressures Mounting from Multiple Directions Simultaneously
The underlying logic for the BOJ's accelerated tightening is that inflation risks are heating up simultaneously from multiple dimensions.
Yen Depreciation. The yen hit a 40-year low last month. Although Japan and the U.S. subsequently conducted a rare joint intervention, the depreciation trend has not reversed. A weaker yen directly pushes up import costs and transmits them to a wide range of consumer prices.
Elevated Wholesale Prices. Japan's annual wholesale inflation remained at a three-year high in July, meaning cost pressures on the corporate side have not been fully passed on to consumers—once companies begin passing on costs, consumer prices will rise further.
Rising Inflation Expectations. Surveys show that inflation expectations among households, businesses, and economists are all near or above 2%. This is one of the most alarming signals for the central bank—once expectations become unanchored, the difficulty of controlling inflation multiplies.
Overlapping External Shocks. Continued conflict in the Middle East is disturbing energy and commodity prices, while strong global AI demand is driving up demand for related equipment and energy, both constituting additional imported inflationary pressures.
Inside the Central Bank: Cannot Wait Too Long
The BOJ kept interest rates unchanged in July but issued its strongest signal yet for an earlier rate hike—warning that accumulating inflation pressures could push core inflation above its 2% target.
The summary of opinions from the July meeting showed that some board members explicitly called for accelerating the pace of rate hikes to avoid "falling behind the curve" in responding to inflation—a common phrase in central banking circles meaning that if action is delayed, more aggressive tightening will be needed later to remedy the situation.
Governor Kazuo Ueda stated at the post-meeting press conference in July that he would take full account of the board's growing vigilance over inflation risks when chairing future meetings, noting that the BOJ could accelerate the pace of hikes if financial conditions are deemed too accommodative.
A third source was more direct: "Given rising inflation risks, the BOJ probably won't want to wait too long to raise rates."
