The Bank of Japan (BOJ) raised its policy interest rate by 25 basis points to 1.25%, marking its highest level since 1995. This hike represents an acceleration in the BOJ’s rate-tightening cycle, coming just three months after the last increase in June 2026, compared to a six-month interval previously. The decision to raise rates was narrowly supported, with a 7-2 split among board members. Dissenters Toichiro Asada and Ayano Sato, appointed by Prime Minister Sanae Takaichi, favored holding rates steady, citing subdued core inflation and a lack of substantial economic acceleration.

The BOJ justified the rate increase by expressing concern over inflation potentially rising above its 2% target. The central bank aims to maintain inflation near this level to prevent overshooting, which could destabilize the economy down the line. Japan’s headline inflation hit 1.9% in August, signaling a rise but still shy of the target. The policy move follows joint intervention by Tokyo and Washington to support the weakening yen, which traded at 156.64 against the dollar after the announcement, slightly depreciating by 0.45%.

The core inflation rate, a key focus for dissenting board members, stood at 1.7% in August, slightly lower than July’s 1.8%. Asada argued this lower core inflation indicated the economy might not be strong enough to justify a rate hike, while Sato noted that economic and price trends did not show significant recent acceleration. Their opposition underscores an ongoing debate within the BOJ about the timing and pace of monetary tightening amid inflation concerns and volatile currency conditions.

Externally, the United States has urged Japan to continue its rate-hiking trajectory, putting pressure on Prime Minister Takaichi’s preference for an easier monetary stance combined with expansionary fiscal policies. Treasury Secretary Scott Bessent recently met with BOJ Governor Kazuo Ueda to advocate for decisive monetary measures aimed at market stability, highlighting the international dimension influencing Japan's policy decisions going forward.