The rate that moves stocks worldwide
USD/JPY is one of the three most-traded currency pairs in the world, alongside EUR/USD and GBP/USD. Trillions of dollars flow through it every day. When it moves meaningfully, it tends to drag global stock markets with it, because the yen sits at the center of the world's carry trade complex. A 3% USD/JPY move overnight can trigger selling in Tokyo, which ripples through Hong Kong, then Europe, then New York.
At current levels the rate typically sits somewhere between 140 and 160 yen per dollar. One dollar buying 150 yen means $100 becomes ¥15,000 and $1,000 becomes ¥150,000. Those large numbers are normal for yen — it is not that Japan is expensive in absolute terms, just that the yen is a small unit.
Why this pair moves so violently
USD/JPY is unusually volatile for a major-currency pair. Two reasons. First, the carry trade: enormous amounts of speculative capital are short yen and long dollars, so any shock that forces these positions to unwind causes rapid moves. Second, Bank of Japan intervention: unlike most G7 central banks, the BOJ actively buys and sells yen in the market when it judges the currency to be moving too fast. In late 2022 and again in 2024, the BOJ intervened to strengthen the yen by spending tens of billions of dollars in the open market.
These interventions work, but only temporarily. The BOJ can slow the yen's slide but cannot reverse it without actually raising interest rates to close the rate differential with the Fed. Interventions typically move the rate 3-5% in a day, and most of that move reverses within a few weeks as the underlying pressures reassert themselves.
What moves USD/JPY day-to-day
- US Treasury yields. USD/JPY tracks the 10-year US Treasury yield almost perfectly. When US yields rise, the dollar becomes more attractive relative to the yen, and USD/JPY rises with it.
- BOJ policy. Japan maintained negative interest rates until 2024. Any hint that the BOJ might raise rates moves the yen sharply stronger. Any confirmation that rates will stay low moves it weaker.
- Fed decisions. Every FOMC meeting moves USD/JPY. Hawkish Fed = higher USD/JPY. Dovish Fed = lower USD/JPY.
- Risk sentiment. In risk-off episodes, USD/JPY typically falls as carry trades unwind. In risk-on episodes, it rises as traders put carry trades back on.
For travelers to Japan
The USD/JPY rate directly determines how expensive Japan is for American visitors. At 110 yen per dollar (mid-2010s levels), Tokyo was one of the most expensive cities in the world. At 155 yen per dollar (2024 levels), it became one of the cheapest developed-world destinations for dollar-holders — a ramen that cost $15 at 110 suddenly costs $10 at 155. This is why Japan tourism exploded after 2022: the yen's weakness effectively put the country on sale.
When you see tourists joking that "Japan is 40% off," they are right in a real sense. It is not that prices inside Japan fell. It is that the yen fell against the dollar, and that move showed up in every yen-denominated price tag for foreigners.
Reading the chart
The 5-year USD/JPY chart shows the yen's dramatic weakening post-2022. Before the Fed started raising rates, the pair traded around 110. As US rates rose to 5%+ while Japan's stayed near zero, the pair shot up past 150. The occasional downward spikes are BOJ interventions or carry-trade unwinds. The fact that the trend has remained upward despite these spikes tells you everything about which side has the underlying pressure.