Japanese Yen finds relief as officials warn against rapid currency moves

• Japanese Yen firms as intervention warnings weigh on USD/JPY near the 160.00 mark.
• A modest US Dollar pullback offers some relief, though hawkish Fed expectations limit the Yen's recovery.
• Cautious remarks from BoJ policymaker Toichiro Asada cast doubt on the pace of further rate hikes.

USD/JPY trades slightly lower on Thursday after climbing to 159.94, its highest level in more than two months. Bets on more aggressive Federal Reserve (Fed) rate hikes strengthened the US Dollar (USD), bringing the pair within touching distance of 160.00, putting the risk of Japanese intervention back in focus. At the time of writing, USD/JPY trades around 159.70, down 0.10% on the day.

Japan’s top currency diplomat, Atsushi Mimura, said on Thursday that recent currency moves had been too fast, adding that “it’s still too early to forget what happened this summer.” Japan spent a record ¥15.4 trillion buying Yen over three days between July 30 and August 3 after the currency weakened to nearly 164 per US Dollar, its lowest level in about 40 years.

Japan signals readiness to defend Yen as USD strength complicates intervention

Analysts at MUFG/BTMU argue that recent official rhetoric “sends a strong signal that Japan is prepared to intervene again to support the Yen,” a stance they believe “should help to limit further upside for USD/JPY beyond 160.00.” However, they caution that “it will be even more difficult to reverse the upward trend for USD/JPY right now with the USD strengthening broadly on the back of expectations for faster Fed rate hikes.” In their view, “if the rising risk of further intervention helps to stabilize USD/JPY while the US Dollar continues to strengthen more broadly, it could see non-USD Yen crosses moving lower.”

However, a modest pullback in the US Dollar (USD) on Thursday takes some pressure off the Japanese Yen (JPY). The US Dollar Index (DXY), which tracks the Greenback against six major currencies, trades near 102.88 after reaching 103.08, its highest level since April 2025.

Traders now fully price in a December Fed rate hike, with a 25-basis-point (bps) move the most likely outcome and a small chance of a larger 50 bps increase. Those bets firmed after hotter-than-expected US consumer inflation data earlier this week and calls from Fed officials for further hikes to bring inflation back to the 2% target.

Meanwhile, Bank of Japan (BoJ) board member Toichiro Asada warned that “rate hikes may harm the economy, reduce core inflation.” He said that with the policy rate in the neutral range, a “further hike could have greater effect on the economy” and that the BoJ “must be cautious about the pace of increases.” Asada also said current price increases “aren’t necessarily fueled by demand” given weak growth and consumption.

Traders now turn to weekly US jobless claims later on Thursday and Friday’s Producer Price Index (PPI) for fresh clues on the Fed’s December decision.