Yen Languishes Near 4-Decade Low

The Japanese yen hovered near a four-decade low around 163.7 per US dollar, with repeated warnings of possible intervention failing to curb the currency’s weakness amid broad US dollar strength. Traders largely shrugged off remarks from Japan’s Finance Minister that the government was prepared to take decisive action in the foreign exchange market if needed, as well as reports that Bank of Japan officials are open to a faster pace of rate increases than markets currently expect. Concerns over Prime Minister Sanae Takaichi’s fiscal policy are also weighing on the currency, while escalating US-Iran tensions have fueled concerns about Japan’s economy given its heavy reliance on imported energy. Meanwhile, Japan’s headline inflation rose to a six-month high in June, supporting expectations for further rate hikes. The yen has fallen 0.8% so far this week, putting it on track for its worst weekly performance since May, when it weakened following Japan’s record currency intervention.

The U.S. Treasury Department said the Japanese yen has remained weak despite a narrowing in U.S.-Japan interest rate differentials, adding that excessive currency volatility is undesirable. In its semi-annual currency report released Thursday, the Treasury urged the Bank of Japan to continue raising interest rates, arguing that higher borrowing costs would help contain inflation and stabilize the exchange rate. "Monetary policy normalisation would help anchor inflation expectations and reduce excessive exchange rate volatility," the report said. The Treasury noted that while nominal wages have risen significantly, inflation continues to erode households' purchasing power, underscoring the need for further policy normalization. The comments came as the yen fell to a fresh 40-year low against the U.S. dollar Thursday, heightening market expectations that Japanese authorities could intervene in the foreign exchange market after repeatedly warning they would act against excessive moves.

The Japanese yen dropped to around 163.8 per US dollar on Thursday, hitting its lowest level in four decades despite expectations of faster BOJ rate hikes and potential currency intervention. Reports on Wednesday indicated that the BOJ is on alert to upside inflation risks that could prompt it to raise rates more quickly than markets expect. Finance Minister Satsuki Katayama also reiterated that the government is prepared to take decisive action in the forex market if necessary. However, these have done little to reverse the yen’s broader weakness amid a firm US dollar and Japan’s relatively low interest rates. Sentiment toward the currency has weakened in recent weeks as investors navigate a changing policy backdrop under PM Sanae Takaichi, whose administration has struggled to dispel perceptions that it could pressure the BOJ to delay rate hikes. Rising Middle East tensions are also raising concerns over Japan’s economy, given its heavy reliance on imported energy.