Why the Yen is So Weak
The single biggest reason for the yen's prolonged weakness is a massive gap in interest rates. For decades, the Bank of Japan (BOJ) has kept its interest rates at or near zero to fight off economic stagnation and deflation. Meanwhile, central banks in other
major economies, particularly the U.S. Federal Reserve, have raised rates to combat inflation. This creates what is known as a "carry trade," where investors borrow money cheaply in yen and invest it in higher-yielding assets abroad, like U.S. government bonds. To do this, they sell yen and buy dollars, pushing the yen's value down. Even after the BOJ cautiously began raising rates from negative territory in 2024, the gap remains enormous, continuing to put downward pressure on the currency.
A Double-Edged Sword for the Economy
A weak yen has mixed consequences for Japan's economy. On one hand, it’s a major boon for the country's giant exporters, like Toyota and Sony. When their overseas profits, earned in dollars or euros, are converted back into yen, they are worth much more, boosting corporate earnings. A cheaper yen also makes Japan a more affordable destination for tourists, fuelling a boom in the travel sector. However, the downside is severe for Japanese households and businesses that rely on imports. Japan is heavily dependent on imported energy and food, and a weak yen makes these essentials significantly more expensive. This imported inflation erodes purchasing power and has caused real wages to fall, squeezing household budgets.
What is Currency Intervention?
When the yen's decline becomes too rapid and is seen as disorderly, Japanese authorities step in with a powerful tool: currency intervention. This is when a central bank or finance ministry buys or sells large amounts of its own currency to influence its value. To strengthen the yen, Japan's Ministry of Finance orders the Bank of Japan to sell its foreign currency reserves (mostly U.S. dollars) and buy huge quantities of yen. This sudden, massive demand for yen is designed to push its price up and scare off speculators betting against it. Japan has spent tens of billions of dollars in these operations, including record-breaking amounts in 2022 and further large-scale interventions into 2026.
The Intervention Dilemma: A Temporary Fix?
While intervention can cause a sharp, immediate rally for the yen, its effects are often short-lived. Analysts widely agree that intervention alone cannot reverse a currency's trend if the fundamental economic drivers—namely, the interest rate gap—remain unchanged. Essentially, it's like trying to bail water out of a boat without fixing the leak. The pressure from the wide interest rate differential often proves stronger than the temporary boost from intervention, causing the yen to resume its slide after the official buying stops. In a rare move, the U.S. even joined Japan in a coordinated intervention in 2026, signaling shared concern over financial stability, but even this powerful action has struggled to create a lasting reversal.
What's Next for the Yen?
The future of the yen hinges on a difficult balancing act. The Bank of Japan is caught between a rock and a hard place. Raising interest rates significantly to close the gap with the U.S. would strengthen the yen but could also harm Japan's fragile economic growth and increase the government's massive debt servicing costs. On the other hand, keeping rates too low risks further currency depreciation, which continues to hurt consumers and could lead to financial instability. Without a fundamental shift in the BOJ's monetary policy or a change in direction from the U.S. Federal Reserve, Japan may be stuck in a cycle of managing the yen's decline with costly, short-term interventions.
