Japan concerned about rapid, one-sided yen moves, finance minister says

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  Published in Business and Finance on Friday, October 10th 2025 at 0:44 GMT by Channel NewsAsia Singapore

Japan’s Treasury Minister Warns of “Rapid One‑Sided” Yen Moves Amid Uncertain Global Markets

The Japanese yen, long a bellwether for global currency stability, has once again become a headline‑making force as it has been pushed to a near‑record low against the U.S. dollar. In a press conference on Wednesday, Finance Minister Shunichi Suzuki signalled that the government remains “concerned” about the rapid, one‑sided decline of the yen, but stressed that there was no imminent plan for direct market intervention. The statement comes at a time when the yen has slumped past 158 per dollar for the first time in more than a decade, raising alarms not just for policymakers but also for exporters, importers and the wider Japanese economy.

Why the Yen is Falling – and Why It Matters

The yen’s slide can be traced to a confluence of domestic and international forces. On the global front, the U.S. Federal Reserve’s dovish stance has gradually softened, allowing the dollar to strengthen in the wake of aggressive rate hikes and a tightening global monetary policy environment. In contrast, the Bank of Japan (BoJ) remains firmly committed to its ultra‑loose policy framework, keeping policy rates near zero and maintaining yield curve control to keep long‑term rates anchored.

Inside Japan, the country is still grappling with persistent deflationary pressures and a sluggish domestic growth rate. As the yen weakens, imported goods become more expensive, a factor that could exacerbate inflationary pressures that the government has been keen to keep in check. Meanwhile, exporters enjoy a temporary boost in competitiveness, but the long‑term ramifications of a persistently weak yen—such as increased borrowing costs for yen‑denominated debt—are a source of concern for corporate and financial sectors alike.

In his comments, Suzuki highlighted that the “rapid, one‑sided” nature of the yen’s movements could signal speculative pressure in the forex market, a dynamic that, if left unchecked, might undermine confidence in Japan’s financial stability. “We are watching closely,” Suzuki told reporters, adding that the government would be ready to act if market volatility exceeded acceptable thresholds.

The Treasury’s Dual Role: Monitoring and Potential Intervention

The Treasury Ministry’s involvement in foreign‑exchange policy is largely supervisory. It does not directly intervene in the market but instead keeps a close eye on volatility and coordinates with the BoJ, which holds the legal mandate to step in if necessary. According to a statement released alongside the minister’s remarks, the Ministry will rely on a range of policy tools—including monetary policy adjustments, communication strategies and, if warranted, discretionary intervention—to preserve market integrity.

Suzuki’s comments echo a broader sentiment that while Japan is unlikely to intervene on a daily basis, it will not shy away from taking decisive action should the yen’s decline threaten to destabilise the economy or erode investor confidence. He cited the example of the 1990s, when the Japanese government intervened to curb excessive volatility that had led to a speculative bubble in the asset‑price market. “We are prepared to take action if the market conditions warrant it,” Suzuki said.

Market Reactions and Broader Economic Implications

The yen’s drop has already had ripple effects across markets. Japanese stocks, particularly those in export‑heavy sectors such as automotive and electronics, experienced a short‑term rally as the weaker yen translated into higher earnings for companies with large overseas sales. However, the rally was tempered by the broader concerns over rising import costs and a potential increase in inflation.

The Ministry’s statements also carry implications for Japan’s trade policy. A weaker yen can boost Japan’s trade balance by making exports cheaper, but it simultaneously raises the cost of imports, potentially squeezing domestic consumers and businesses that rely on foreign raw materials. In a recent interview, Suzuki noted that while the Ministry is willing to take corrective measures if necessary, it will also engage in diplomatic dialogue with trading partners to manage the macro‑economic implications of currency movements.

Looking Ahead – What’s Next for Japan?

With the BoJ’s policy stance largely unchanged and the Treasury Ministry signifying its readiness to intervene if needed, the immediate outlook for the yen appears to hinge on a few key factors:

1. U.S. Monetary Policy Trajectory – As the Fed continues to shift toward a “normalisation” of policy, the dollar will likely remain strong, pushing the yen further lower unless a policy shift occurs in Japan.

2. Japan’s Domestic Inflation Outlook – Should inflation remain stubbornly low, the BoJ may continue to keep rates near zero, providing the backdrop for a weak yen.

3. Global Risk Sentiment – In periods of heightened global uncertainty, the yen often acts as a safe‑haven currency, potentially causing temporary rallies that could offset downward pressure.

4. Potential Intervention – If volatility reaches a level that threatens macroeconomic stability, the Ministry and BoJ may intervene, a move that could have a short‑term stabilising effect but could also raise questions about market credibility.

The Finance Minister’s remarks serve as a reminder that even in an era of ultra‑loose domestic policy, Japan remains vigilant about foreign‑exchange volatility. While the government is not yet taking immediate action, its public declaration of concern signals that it is monitoring the situation closely and is prepared to step in if the market’s trajectory becomes too disruptive.

For exporters, importers, and investors, the key takeaway is that the yen’s movements will continue to be a barometer of both global monetary policy dynamics and Japan’s domestic economic health. In the coming weeks, market participants will undoubtedly keep a keen eye on the Treasury Ministry’s future statements, the BoJ’s policy updates, and the Fed’s forward guidance for clues on how the currency battle will evolve.