The Japanese Yen (JPY) remained stable against the US Dollar (USD), with USD/JPY trading around 157.40 on Tuesday, showing little change from the previous day. This stability comes as traders weigh the risk of intervention by Japanese authorities against ongoing support for the US Dollar, driven by expectations of further monetary tightening in the United States [1].
Japanese Finance Minister Satsuki Katayama intensified Tokyo's warnings regarding the Yen's performance, stating that an undervalued Yen generally poses problems. Katayama also indicated agreement with US Treasury Secretary Scott Bessent to strengthen cooperation between Japan and the US, following their talks on September 25. She emphasized that Japan will continue close communication with the US Treasury to ensure orderly foreign exchange market conditions, reinforcing investor caution after a series of warnings from Japanese officials about Yen weakness [1].
Japan's top currency diplomat, Atsushi Mimura, echoed these concerns, urging markets to take seriously the "very clear" message from Tokyo and Washington about Yen depreciation. The possibility of coordinated action between the two countries is seen as a factor limiting gains in USD/JPY [1]. Markets are awaiting data from Japan's Ministry of Finance, due Wednesday, which will disclose any currency intervention between August 27 and September 28, potentially revealing whether the rate check reported on September 18 led to actual Yen purchases [1].
On the monetary policy front, the Bank of Japan (BoJ) raised its policy rate to 1.25% on September 18, marking a tightening cycle that is providing some support for the Yen. Investors are now focused on upcoming Japanese economic data, such as the Tankan survey and Tokyo Consumer Price Index (CPI), for further indications of possible rate hikes [1]. Despite these developments, USD/JPY remains supported by high US yields and expectations of additional Federal Reserve rate increases. The CME FedWatch tool indicates a roughly 70% probability of a 25-basis-point Fed rate hike at the October meeting, following a rate increase in September [1].
Analysts at MUFG note that recent statements from policymakers have become more forceful, sending "a strong signal that Japan is prepared to intervene … to support the yen," and encouraging speculation about further actions [1].
CONCLUSION
The Japanese Yen's stability reflects a balance between intervention risks from Japanese authorities and ongoing US Dollar strength due to Fed tightening expectations. Market participants are closely watching for official intervention data and upcoming economic indicators, as policymakers signal readiness to act if Yen weakness persists.