Japan hikes rates to 31-year high amid pressure from US Treasury Secretary Scott Bessent

The Bank of Japan just did something it hasn’t done in over three decades: pushed interest rates to 1.25%. The 25 basis point hike, decided in a 7-2 vote on September 18, marks the highest Japanese policy rate since 1995, and it didn’t happen in a vacuum.

US Treasury Secretary Scott Bessent has been quietly, and sometimes not so quietly, nudging Tokyo toward tighter monetary policy for months. The result is a pivotal moment for the world’s fourth-largest economy as it attempts to exit the ultra-loose monetary era that defined Japanese finance for a generation.

Bessent’s fingerprints on Tokyo’s rate decision

The path to this hike traces back to at least May 2026, when Bessent held private meetings with Japanese officials advocating for tighter monetary conditions. His argument was straightforward: Japan’s weak yen was creating imbalances, and the country’s legacy of Abenomics-era reflation policies had run their course.

Bessent escalated his public advocacy at the G20 gathering in late August, making pointed comments about the need for Japan to stabilize its currency and rein in fiscal excess.

This was the sixth rate increase in the current tightening cycle, following a hike to 1.00% back in June. Between those two moves, Japanese and US authorities coordinated a joint currency intervention around late July and early August to prop up the yen.

Inside the 7-2 vote

Two dissenting members, Toichiro Asada and Ayano Sato, voted against the hike, citing concerns about its impact on economic growth. Both were appointed by Prime Minister Sanae Takaichi, whose political base has historically leaned toward accommodative monetary policy.

The three-month gap between the June and September hikes suggests the central bank is trying to move deliberately rather than aggressively.

BOJ Governor Kazuo Ueda indicated that consecutive rate hikes remain on the table. He went further, noting that 50 basis point increases, double the size of the latest move, are possible if conditions warrant it.

Why inflation forced the BOJ’s hand

Rising energy costs, aggravated by geopolitical instability including the ongoing conflict in Iran, have kept price pressures elevated. For a country that spent years trying to generate inflation, the BOJ now finds itself in the unfamiliar position of trying to contain it.

Abenomics, the suite of policies named after former Prime Minister Shinzo Abe, was built on the premise that Japan needed massive monetary stimulus to escape its deflationary trap. Negative interest rates, yield curve control, and enormous asset purchases were the tools of choice. Now the BOJ is methodically dismantling that framework.

What this means for markets

For currency markets, the immediate implication is yen strength. Higher Japanese rates narrow the interest rate differential between the yen and the dollar, making yen-denominated assets relatively more attractive. Carry trades, where investors borrow in low-yielding yen to invest in higher-yielding currencies, become less profitable. The unwinding of those positions caused significant volatility in August 2024 when the BOJ last surprised markets.

Japanese government bonds face obvious headwinds. Higher policy rates push bond yields up and prices down, which has implications for the massive holdings of Japanese debt sitting on the balance sheets of domestic banks and insurers.

Bitcoin and other risk assets have historically shown sensitivity to changes in the yen carry trade, as the August 2024 episode demonstrated when carry trade unwinding contributed to a broad selloff across asset classes.

Ueda’s hint at potential 50 basis point moves introduces a new variable into global rate expectations. The two dissenting votes suggest that acceleration isn’t guaranteed, but the direction of travel is unmistakable.