Japan’s central bank has taken a significant step into a new phase of monetary policy, raising its key interest rate to 1.25%—the highest level since 1995—as the economic shockwaves from the Iran conflict add fresh pressure to prices and financial markets.
The Bank of Japan (BoJ) increased its target rate from 1% after a 7–2 policy vote, bringing Japan closer to the policy direction being followed by major central banks elsewhere. The move reflects a changing challenge for Japan: after years of trying to push inflation upward, policymakers are now increasingly concerned about preventing price growth from moving beyond their 2% objective.
BoJ Governor Kazuo Ueda left the door open to another increase at the bank’s next meetings, saying future decisions would depend on incoming economic and price data. He stressed that there was no predetermined timetable for rate increases and that officials would assess conditions at each policy meeting.
Japan’s annual inflation rate stood at 1.9% in August, close to the central bank’s target. Ueda said the policy priority had therefore shifted from encouraging inflation toward keeping underlying inflation stable around 2%.
The decision also comes as the yen faces renewed pressure. The currency fell by more than 1% against the US dollar on Friday, continuing a broader period of weakness that has increased concern over imported costs, particularly for energy and other commodities.
Currency pressures have already attracted international attention. US Treasury Secretary Scott Bessent recently warned traders against betting against the yen following coordinated US-Japanese action aimed at stabilising the currency. The US Treasury also reportedly used billions of dollars in euro sales to acquire yen during efforts to halt its decline.
Yet the BoJ’s latest move does not necessarily signal the beginning of a rapid tightening cycle. Analysts cited in market commentary pointed to the two dissenting votes and the cautious language surrounding future increases as evidence that policymakers remain divided over how quickly borrowing costs should rise.
Markets reacted in an unusual way. Despite the rate increase, the Nikkei rose nearly 2%, while Japan’s two-year government bond yield declined four basis points to 1.82%. European markets, meanwhile, were around 0.5% lower.
The wider backdrop remains dominated by energy uncertainty. Hopes that alternative routes could help Middle Eastern oil reach international markets pushed Brent crude down as much as 1.5% to about $103.29 a barrel, although concerns surrounding regional attacks and disruption remained.
Japan’s decision therefore goes beyond a single interest-rate announcement. It marks a turning point in a country that spent decades fighting deflation and weak price growth. With inflation now close to target, a vulnerable currency and a Middle East conflict threatening to reshape energy costs, Tokyo is trying to find a delicate balance: restrain inflation without unnecessarily weakening an economy still adjusting to higher borrowing costs.
