The USD/JPY pair traded on a soft note during Monday's Asian session, with the exchange rate sliding back toward the 156.00 mark after an earlier rebound failed to sustain momentum. On Friday, the pair found some support near the early-August lows and staged a moderate bounce, but the upside proved limited. As the new trading week got underway, market attention shifted back to the Bank of Japan's policy trajectory and shifting expectations for U.S. interest rates.

One of the core factors underpinning the yen is the noticeable uptick in market expectations for further monetary policy tightening by the BOJ. Traders have largely priced in a 25-basis-point rate hike at the September 17-18 meeting, while discussions have also emerged regarding the potential for additional policy adjustments in December. Should the BOJ signal a clearer path toward tighter policy, the anticipated narrowing of the U.S.-Japan rate differential would likely intensify, adding sustained downward pressure on USD/JPY.

Domestic inflation in Japan remains a critical variable shaping policy expectations. Core price growth in the country has stayed at relatively elevated levels, and Tokyo's regional price indicators suggest inflationary pressures have yet to fully dissipate. In this context, the policy environment confronting the BOJ has shifted markedly from the prolonged period of ultra-loose monetary policy. As long as Japan's price and wage dynamics remain resilient, market expectations for continued BOJ rate hikes are unlikely to fade quickly.

Meanwhile, concerns over potential official intervention to stabilize the yen are also amplifying the risks associated with any upside move in USD/JPY. Should the pair rapidly approach the 160 level again, investors would likely reassess the threat of intervention, prompting some bullish positions to exercise greater caution at higher levels. For the currency market, the combined influence of policy expectations and intervention risk is affording the yen a degree of protection during periods of weakness.

However, the U.S. dollar is not entirely on the back foot. The latest non-farm payrolls report came in stronger than market expectations, prompting investors to reevaluate the Federal Reserve's policy path for its September meeting. If the labor market demonstrates continued resilience, and inflationary pressures from rising energy prices resurface, the Fed could maintain higher interest rates for longer than previously anticipated. A rebound in U.S. rate expectations is theoretically supportive of the dollar and could limit the downside for USD/JPY.

Yet dollar bulls have not significantly expanded their positions, primarily because U.S. inflation data for the week is imminent. Market participants will closely watch the producer price index and consumer price index to determine whether the recent surge in energy costs is filtering through to broader goods and services prices. If inflation readings come in higher than expected, bets on Fed rate cuts could cool further, lending fresh support to the dollar. Conversely, a renewed slowdown in price pressures could reignite expectations for the Fed to maintain or gradually pivot toward a more accommodative stance, potentially exposing USD/JPY to greater downside risk.

Adding to the mix, heightened tensions between the U.S. and Iran, along with developments in the Strait of Hormuz, are providing some safe-haven support for the dollar. Crude oil prices have climbed sharply recently, heightening global concerns over energy supplies and financial market volatility. In a risk-off environment, the dollar, as a traditional safe-haven currency, could attract capital inflows—a factor that partially offsets the downward pressure on USD/JPY arising from BOJ rate hike expectations.

Additionally, the U.S. Labor Day holiday has left market liquidity relatively thin, making price movements during Asian and European hours more susceptible to short-term speculative flows. In this environment, a mere break below the 156 level by USD/JPY does not necessarily confirm a completed trend shift. The market is currently focusing on whether the 155.30-155.20 region can be convincingly breached. A decisive loss of this zone would reinforce the validity of the prior downtrend, while a bounce off this area—bringing prices back above 156—could alleviate short-term bearish momentum.

From a sentiment perspective, USD/JPY is currently caught in a tug-of-war between two opposing forces. On one hand, BOJ rate hike expectations and potential intervention risks are driving yen buying. On the other, U.S. labor market strength, inflation concerns tied to energy prices, and geopolitical risks are limiting the dollar's decline. Consequently, until U.S. inflation data is released, the market is likely to remain cautious, with near-term volatility in the pair potentially expanding noticeably.

On the technical front, the daily chart for USD/JPY retains a bearish short-term structure. The pair is trading below the key 200-day simple moving average at 158.46, signaling that the medium-term trend has not yet turned bullish. As long as prices fail to stabilize above 158.46, the downtrend formed from last month's highs remains intact. To the downside, initial attention is on the 155.30-155.25 area, a critical horizontal support. A daily close below this level could open the door to further declines, with the 155 handle and the 153.80-154.00 zone emerging as subsequent targets if bearish momentum strengthens. On the upside, near-term resistance lies in the 156.80-157.20 region, followed by the 158.00 area and the 200-day MA at 158.46.

On the 4-hour chart, USD/JPY remains in a weak rebound structure within a broader downtrend, with the 156 level acting as a pivotal battleground in the short term. Unless the pair can reclaim the 156.80-157.20 zone on a rebound, short-term moving averages are likely to keep exerting downward pressure, and MACD momentum could expand to the downside once more. A decisive break below the 155.30-155.20 region would likely accelerate the 4-hour downtrend, potentially targeting the 154 area. Conversely, if prices find solid buying interest around 155.20 and push back above 157, the short-term bearish structure would weaken, possibly leading to a rebound toward the 158 region.

The most critical technical signals to monitor right now are whether the 155.30-155.20 support can be decisively broken and whether a sustained wave of selling pressure emerges following the loss of the 156 level.

In summary, USD/JPY is currently entangled in a dual tug-of-war between BOJ rate hike expectations and a renewed uptick in U.S. rate expectations. In the near term, the BOJ's September rate hike expectations, potential currency intervention risks, and the dollar's generally softer tone remain key factors weighing on the pair, while U.S. labor data resilience, rising energy prices, and safe-haven demand provide underlying support for the dollar. In the coming sessions, U.S. inflation figures will serve as a critical catalyst determining the dollar's direction. If price data continues to run hot, the dollar could find renewed upward momentum, potentially keeping USD/JPY range-bound between 155 and 158. However, if inflation cools and reinforces expectations for a Fed policy pivot, coupled with more hawkish signals from the BOJ, a break below the 155.30-155.20 support would significantly increase the probability of further downside.

Therefore, it would be unwise to judge the trend based on any single economic data point. Market participants need to simultaneously monitor the U.S.-Japan interest rate differential, BOJ policy expectations, U.S. inflation performance, and the potential intervention risk near the 160 level. In the near term, USD/JPY remains biased toward a bearish structure, but with key data looming, currency volatility is likely to remain elevated.