TOKYO — The U.S. dollar fell sharply against the Japanese yen on Monday after the United States and Japan confirmed they had carried out their first coordinated currency market intervention in 15 years, a rare move aimed at supporting the struggling Japanese currency.
The announcement came after days of speculation that authorities had stepped into foreign exchange markets as the yen continued to weaken to levels not seen in four decades.
In early trading Monday, the dollar dropped roughly 1% to 156.34 yen, extending losses that began late last week. Prior to the suspected intervention, the U.S. currency had climbed above 163 yen, its strongest level against the Japanese currency in about 40 years.
The rapid decline in the dollar marked a significant shift in the foreign exchange market, where moves of this magnitude are relatively uncommon among major currencies.
U.S. President Donald Trump and Japan’s finance minister both confirmed that the two governments had coordinated their actions, making it the first publicly acknowledged joint currency intervention between the countries since 2011.
Currency intervention occurs when governments or central banks buy or sell currencies in the open market to influence exchange rates. In this case, officials sought to strengthen the yen after months of persistent weakness driven by the widening gap between U.S. and Japanese interest rates.
The yen has been under sustained pressure as the U.S. Federal Reserve has maintained relatively high interest rates, making dollar-denominated assets more attractive to investors. Meanwhile, Japan has only gradually moved away from years of ultra-low interest rates, leaving the yen at a disadvantage against the dollar.
The prolonged depreciation of Japan’s currency has become a growing concern for policymakers. While a weaker yen can benefit Japanese exporters by making their goods more competitive overseas, it also raises the cost of imports, including energy, food, and raw materials.
For Japan, which relies heavily on imported fuel and other essential commodities, the weaker currency has contributed to higher consumer prices and increased financial pressure on households and businesses. Rising import costs have added to inflation, eroding purchasing power and prompting repeated warnings from government officials.
Japanese authorities had repeatedly signaled they were prepared to act if excessive currency volatility threatened the economy. Last week’s sudden swings in the exchange rate fueled speculation that officials had already entered the market, even before the coordinated intervention was formally confirmed.
Market analysts said the official announcement reinforced confidence that both governments were committed to preventing disorderly movements in the currency markets. However, many cautioned that sustained support for the yen will likely depend on broader economic factors, particularly the future path of interest rates in both countries.
Investors will now be closely watching upcoming comments from the Federal Reserve and the Bank of Japan for clues about future monetary policy. Any changes in interest rate expectations could significantly influence the dollar-yen exchange rate in the coming months.
The coordinated intervention represents a rare instance of close cooperation between Washington and Tokyo in currency markets. Such joint actions are typically reserved for periods of exceptional market volatility and signal a shared concern that excessive exchange-rate movements could threaten financial stability.
Although Monday’s intervention helped push the yen higher, analysts noted that long-term currency trends will ultimately depend on economic fundamentals, inflation, and central bank policy rather than intervention alone.
