The Japanese yen is hovering near its lowest level against the U.S. dollar this year, with traders anticipating a higher threshold for official intervention this time around.

On Thursday, the yen weakened past 159 per dollar, approaching the 159.45 level that prompted so-called rate checks by Japanese authorities in January. However, the current situation has changed. Rising oil prices driven by conflict in Iran and strong U.S. economic data have fundamentally strengthened the dollar, potentially making it harder for Japanese officials to justify market intervention.

"The bar for intervention is higher now," said Rodrigo Catril, a currency strategist at National Australia Bank. "We don't think intervention is likely unless there is a disorderly rise in USD/JPY. The 158/159 area was the previous line in the sand; we think the new line may be around 162."

Japan's heavy reliance on energy imports from the Middle East means rising crude prices worsen its trade balance and fuel inflation, naturally putting pressure on the yen. Meanwhile, the U.S. dollar is benefiting from safe-haven capital inflows, further reinforcing the yen's downward trend.

This contrasts sharply with the situation in January, when the yen's decline appeared to be driven more by positioning adjustments and speculative sentiment. Japanese officials have repeatedly emphasized that their focus is on excessive volatility, not defending a specific exchange rate level.

"Compared to January, the motivation for U.S. authorities to conduct rate checks may be lower," wrote JPMorgan strategists including Junya Tanase in a report on Wednesday. "Given that the recent rise in USD/JPY is driven by broad dollar strength, it may be difficult to justify intervention even if the pair trades toward 160." They maintained their medium- to long-term forecast for USD/JPY at 164.