Recently, those watching the currency markets should have noticed that the yen's decline still hasn't stopped. By early 2026, the USD/JPY exchange rate was fluctuating between 152 and 160, approaching 159 by the end of April, nearly hitting the 160 mark. Even more painfully, the real effective exchange rate of the yen hit a nearly 53-year low in February.

To be honest, this isn't a sudden event; several structural factors have been exerting influence behind the scenes. The core of it is the US-Japan interest rate differential—US interest rates remain high while the Bank of Japan has been slow to raise rates, creating a huge arbitrage opportunity. Investors borrow low-interest yen to invest in high-yield dollar assets, leading to continuous yen selling. Plus, Japan’s new government continues the "Abenomics" style, with large-scale fiscal stimulus increasing debt issuance, which raises concerns about fiscal risks and further weakens the yen.

Another often overlooked factor is the Middle East situation. Japan relies heavily on Middle Eastern oil imports, and the blockade of the Hormuz Strait directly threatens energy security. Although Japan has about 250 days of strategic oil reserves, sustained high oil prices still push up import costs and expand the trade deficit. All these factors weaken Japan’s economic fundamentals, making the central bank more cautious about raising rates.

So, when will the yen appreciate? That’s the most pressing question.

In the short term, the turning point is likely the Bank of Japan’s June meeting. Previously, markets expected a rate hike in April, but the Iran war disrupted that rhythm. BOJ Governor Ueda Kazuo explicitly pointed out that geopolitical conflicts bring uncertainty, causing ongoing turbulence in global financial markets. However, market analysts now see a 76% chance of a rate hike in June, which could be the key moment for a yen rebound.

If the BOJ actually raises rates to 1.0% in June, the US-Japan interest differential will narrow significantly, directly boosting the yen’s attractiveness. Some arbitrage funds might start flowing back, pushing the yen higher in the short term. But we also have to admit, this is just a short-term technical rebound.

Looking at the long term, when the yen will rise depends truly on internal structural reforms in Japan. Only when economic growth momentum clearly improves, and a benign "wage-price" cycle takes hold, can the yen establish a long-term strong foundation. Currently, that path still seems very long.

Market forecasts for the yen are quite divided. JPMorgan’s head of FX strategy for Japan, Junya Tanase, is among the most pessimistic on Wall Street, predicting the yen could fall to 164 by the end of 2026. His reasoning is that Japan’s fundamentals remain weak, with little fundamental improvement expected next year, and as other major economies’ interest rates rise and are digested, the tightening effect of the BOJ will be relatively limited.

BNP Paribas’ emerging Asia FX and rates strategist, Parisha Saimbi, expects the yen to dip to 160 by the end of 2026. She believes that next year’s global macro environment will still favor risk sentiment, which generally supports continued arbitrage trading. Considering ongoing arbitrage demand, cautious BOJ actions, and a potentially more hawkish Fed than expected, USD/JPY should stay in a high range.

At this point, if you want to judge the yen’s trend yourself, you should focus on four key factors. First is inflation (CPI)—Japan’s current inflation rate is relatively low globally, limiting the BOJ’s room to raise rates. Second is economic growth data—GDP and PMI figures directly influence the policy space. Third is the BOJ’s monetary policy and Ueda Kazuo’s statements—each of his remarks can be amplified in the short term, directly impacting exchange rate fluctuations. Fourth is international market conditions—policy changes by the Fed and other central banks will relatively influence the yen’s movement.

Another point worth noting is that the yen has a safe-haven attribute. When global risk events intensify, people tend to buy yen for safety, causing it to spike temporarily. Conversely, when global market sentiment stabilizes, the yen often faces continued capital outflows.

In summary, although the short-term widening of the US-Japan interest differential and the slow pace of BOJ policy shifts make it difficult for the yen to strengthen, in the long run, the yen will eventually return to a reasonable level. For travelers and consumers, gradual purchases to meet future needs are advisable; for investors seeking forex profits, consider the above insights, make decisions based on your financial situation and risk tolerance, and consulting a professional is recommended to manage market volatility.