Japan says it stands ready with US for further yen action

Japan's Finance Minister Satsuki Katayama said Tokyo remains in close communication with the United States on foreign exchange developments and that both countries are prepared to take further action if currency volatility intensifies. The remarks, made in the days following a historic coordinated intervention, underscore the degree to which Washington and Tokyo have aligned on exchange-rate policy amid the yen's prolonged weakness.

A Rare Joint Intervention Sets the Stage

The latest signaling follows what was by any measure an extraordinary episode in currency markets. On August 3, Japan's Ministry of Finance confirmed that it had conducted a joint yen-buying operation with the U.S. Treasury Department on July 31, the first coordinated U.S.-Japan currency intervention since the two countries acted together after the 2011 earthquake. The yen had plunged to nearly 164 per dollar — its weakest level in roughly 40 years — before the operation reversed a portion of those losses.nytimes+2

U.S. Treasury Secretary Scott Bessent confirmed the action, saying the Treasury "will not hesitate to participate in further joint intervention". Katayama echoed that language, stating Japan "will not hesitate to conduct further coordinated interventions in the future". Central bank data suggested Japan may have spent tens of billions of dollars buying yen across multiple sessions leading up to and including the joint operation.aljazeera+4

Why the US Got Involved

The U.S. decision to participate was driven in part by concerns about spillover effects into American bond markets. Japan is one of the largest foreign holders of U.S. Treasuries, and a disorderly yen selloff risked forcing Tokyo to liquidate Treasury holdings to raise dollars, which could push up U.S. yields. Japan also announced plans to use a Federal Reserve lending facility for future interventions, allowing it to borrow dollars against its Treasury holdings rather than selling them outright.ancora+1

Analysts at Bank of America ↗ 0.27% revised their year-end yen forecast to 149 per dollar, noting that U.S. participation effectively removes the traditional constraint of Japan's finite foreign exchange reserves. CNBC Comcast Corporation ↗ 0.75% reported that the intervention went beyond conventional foreign exchange management, with two sovereign balance sheets deployed in concert to shift market psychology.cnbc+1

Continued Vigilance

Katayama has said exchange-rate movements should primarily reflect economic fundamentals rather than speculative or disorderly trading. She noted that excessive currency volatility can negatively affect businesses, trade, and household purchasing power — a refrain Japanese officials have repeated throughout 2026 as the yen weakened.businessupturn+2

Despite the intervention's initial success in pulling the yen back from 40-year lows, investors remain cautious about whether the gains can hold. The Wall Street Journal News Corp ↘ 4.19% reported that a sustainable increase in the yen's value has not yet been achieved, even as the joint action established a support level near 160 per dollar. For now, officials in both capitals have made clear they are watching closely — and are willing to act again.cnbc+2