Bank of Japan Governor Kazuo Ueda issued a stark warning on Wednesday (May 27), stating that central banks must prevent this year's oil-driven inflation surge from becoming a lasting global problem. Speaking in Tokyo, Ueda noted that "if inflation expectations are already high and wages are accelerating, the risk of second-round effects is large," adding that the line between temporary and persistent inflation "is not mechanical."
Ueda's comments signal that a rate hike on June 16 is not just likely but could mark the beginning of a broader tightening cycle, finally putting Japan's monetary normalization back on track. Such a move would likely push the yen higher, a development welcomed by US Treasury Secretary Scott Bessent and President Donald Trump. However, it places Ueda on a collision course with Prime Minister Sanae Takaichi, who has built her economic strategy around maintaining a weak yen.
Takaichi's Weak-Yen Doctrine vs. Trump's Demands
Before taking office last October, Takaichi laid out an economic plan dependent on the BOJ keeping rate hikes to a minimum. On the campaign trail, she dismissed the idea of raising rates as "stupid." So far in 2026, Ueda's team has stayed on the sidelines. When the BOJ lifted its benchmark rate to 0.75% in December—a 30-year high—policymakers fully expected to follow with more hikes. Now, Ueda must push past Takaichi and the Liberal Democratic Party to secure his legacy as the governor who finally buried Japan's deflation-era zero-rate regime.
For nearly three decades, the LDP has pressed the BOJ to cut rates—or at least avoid raising them—and largely gotten its way. Since 1999, when the BOJ became the first G7 central bank to cut rates to zero, successive governments have shamed policymakers into leaving them there or going further with quantitative easing. The BOJ came closest to escaping zero rates two decades ago under Governor Toshihiko Fukui, who served from 2003 to 2008. By 2006–2007, his team had unwound QE and lifted the benchmark rate to 0.5%, but one mild recession and the Lehman shock sent the BOJ straight back to zero.
When a new governor arrived in 2008, the first move was to restart QE. In 2013, Governor Haruhiko Kuroda built an even bigger free-money machine and cranked the settings to maximum. By 2018, the BOJ's balance sheet had ballooned past the size of Japan's $4.2 trillion economy—a first for any G7 nation. Ueda arguably waited too long to lift rates in 2023 and 2024, or to shift QE decisively toward quantitative tightening. By the time Trump's trade war hit in 2025, the window for meaningful tightening had narrowed.
Then came Takaichi, a protege of former leader Shinzo Abe, who quickly revived his "Abenomics" playbook of aggressive easing and a weak yen, sharply limiting Ueda's room to push rates to 1% or higher. Yet this stance has put Tokyo in Trump World's crosshairs. During a visit to Tokyo earlier this month, Bessent characterized the yen as undervalued and prodded the BOJ to press forward with rate hikes. "I believe the fundamentals of the Japanese economy are strong and resilient, and that will be reflected in the exchange rate," Bessent said. He added that "we both believe that excess volatility is undesirable, and we have been in close contact with the Ministry of Finance, and we will stay in close contact with them," comments that suggest the US might be willing to engage in joint currency intervention.
The strategy behind Bessent's moves is clear. The White House has made little headway pressuring the US Federal Reserve to ease. Former Chair Jerome Powell resisted despite Trump's threats to fire him and prosecutors' attempts to constrain him. New Fed Chair Kevin Warsh is already boxed in by April's 3.8% year-on-year inflation—the highest level in three years. If Trump and Bessent cannot get the Fed to loosen policy, nudging the BOJ to tighten becomes the next-best lever.
If that is the plan, there is a case for the yen snapping higher once Iran-war chaos fades and the Strait of Hormuz reopens. One reason: the BOJ looks poised to tighten ahead of the Fed. Another: traditional currency relationships have been breaking down. In earlier eras, any outbreak of conflict in the Middle East would send the yen surging. Not in 2026. This year, the currency has instead flirted with the psychologically important 160 yen-per-dollar level. The move has irritated Trump World, which is hypersensitive to any hint that Asia might be seeking a trade edge through artificially low exchange rates.
That sets the stage for a potential clash between the BOJ and Takaichi's government. It may not be as loud or chaotic as Trump versus Powell, but things could get tense if Ueda chooses to do his job rather than defer to the government. Yes, the BOJ has been formally independent since 1998, but it slashed rates to zero soon after and kept them there for more than 25 years. It also remains the financial stabilizer beneath both the government-bond and stock markets. Now the QT process is at risk as Takaichi's team pushes for more BOJ support, not less.
This tension could easily rattle global markets and put a hedge fund or two in the line of fire. It also carries unpredictable consequences for Japan's 125 million people and its corporate establishment. After decades of ultra-easy money, banks, companies, pension funds, endowments, and a government saddled with the developed world's heaviest debt load are in for a shock if Ueda pulls away the punchbowl. For more on Takaichi's broader challenges, see Japan's Takaichi Navigates Budget, Party, and Defense Spending Challenges.
