The Japanese yen is hovering near its lowest level against the U.S. dollar this year, yet traders believe the threshold for intervention by Japanese authorities has increased. On Thursday, the USD/JPY exchange rate surpassed 159, approaching the 159.45 level that prompted the Federal Reserve to conduct so-called "rate checks" in January. However, the context has shifted. Rising oil prices linked to Middle East conflicts and persistently strong U.S. economic data are strengthening the dollar from a fundamental perspective, potentially making it more difficult for Japanese authorities to justify market intervention.

Rodrigo Catril, a foreign exchange strategist at National Australia Bank, stated, "The intervention threshold is higher now. Our assessment is that intervention is unlikely unless we see a disorderly surge in USD/JPY. The 158/159 zone was previously considered the 'last line of defense,' and we suspect the new line may be closer to 162."

Japan's heavy reliance on energy imports from the Middle East means that rising oil prices worsen its trade balance and push up inflation, naturally putting downward pressure on the yen. Concurrently, the U.S. dollar is benefiting from safe-haven capital inflows, further reinforcing the yen's decline. This contrasts with the situation in January, when the yen's drop appeared to be driven more by positioning and speculative momentum.

Japanese officials have repeatedly emphasized that their focus is on excessive volatility, not on defending a specific exchange rate level. Strategists at JPMorgan wrote in a report on Wednesday, "Compared to January, the motivation for U.S. authorities to conduct rate checks is likely lower. Given that the recent round of USD/JPY appreciation is driven by broad-based dollar strength, justifying intervention could be difficult even if the rate moves above 160." They maintained their medium-to-long-term target for USD/JPY at 164.

The yen briefly found support last month when Prime Minister Takaichi Sanae secured an overwhelming victory in the lower house election. However, it weakened again following media reports suggesting her cautious stance towards further interest rate hikes and her nomination of two dovish members to the Bank of Japan's policy board.

Finance Minister Tsutomo Kataoka reiterated earlier this month that the government is prepared to act against excessive currency fluctuations, which could include direct market intervention.

Regarding the Bank of Japan's rate hike outlook, more than a third of surveyed economists indicated that the BOJ is expected to keep policy unchanged next week, with a potential rate increase likely in April. According to a survey conducted from March 5 to 10, all 51 economists polled expect the policy board, led by Governor Kazuo Ueda, to maintain borrowing costs at 0.75% after its two-day meeting concluding next Thursday. The proportion of economists forecasting an April rate hike jumped to 37% from 17% in the previous survey two months ago, with about two-thirds of them identifying April as the earliest possible month for an increase.

Prior to the late-month attacks by the U.S. and Israel on Iran, pricing in the overnight index swap market indicated traders saw about a 68% chance of an April hike, following a series of hawkish comments from officials and some economic data exceeding expectations. Survey results suggest many believe the BOJ will proceed with policy normalization as planned, despite the conflict.

The escalation of Middle East hostilities caused oil prices to spike sharply at the start of the week. Even after some retreat, supply concerns continue to keep energy markets volatile. Many respondents noted that while higher oil prices could weaken the economy, they might also stimulate inflation expectations if the current economic trajectory aligns with the BOJ's projections.

Ryutaro Kono, chief Japan economist at BNP Paribas, wrote in a survey response, "If the economic outlook does not deteriorate, Governor Ueda will likely reiterate the intention to raise rates at his post-meeting press conference. Provided the Middle East situation stabilizes, the base scenario is a rate hike in April."

Beyond the Middle East situation and inflation dynamics, the views of Prime Minister Takaichi are crucial for the BOJ, especially given her historical support for monetary stimulus. Last month, her government nominated two scholars known for their pro-inflation views—Toichiro Asada and Ayano Sato—as new BOJ board members. Approximately 80% of economists said these appointments clearly signal Takaichi's preference for a slower pace of rate increases.

However, analysts are divided on whether the new members can effectively slow the pace of hikes within the nine-member board, with 43% believing they will and 45% believing they will not. Economists also noted that if Takaichi intervenes in BOJ policy discussions with the intent of slowing monetary normalization, the yen could weaken. More than half of the respondents said it would be difficult for Takaichi to prevent BOJ rate hikes, as doing so could lead to yen depreciation. A weak yen has exacerbated high inflation in recent years, putting pressure on households.