Japan Warns of ‘Bold Action’ as Yen Slides Past Four-Decade Low, While Singapore Dollar Hits Record Highs
- admin cys
- Jul 29
- 4 min read
A Report by CYS Global Remit Counterparty Sales & Alliance Unit
JPY/SGD | 7.88 – 7.90 |
Japanese authorities have renewed warnings that they are prepared to intervene in currency markets as the yen weakened beyond ¥163 against the US dollar, reaching its lowest level in nearly four decades.
The yen's decline has also been felt in Singapore, where the Singapore dollar has climbed to record or near-record levels against the Japanese currency. The move highlights the broad-based nature of the yen's weakness and has increased the purchasing power of Singapore dollar holders travelling to Japan or making yen-denominated payments.
Yen Falls Beyond ¥163 as Japan Warns of Intervention
Finance Minister Satsuki Katayama said on July 22 that Japanese authorities remained ready to take action, if necessary, although her remarks did little to halt the yen's decline.
“The situation involving the US and Iran has taken a sudden turn for the worse – a deterioration that the world did not foresee – creating a very difficult environment,” Katayama told reporters. “Our policy remains completely unchanged: We will take appropriate and bold action at any time, should the need arise.”
The yen fell past ¥163 per US dollar overnight for the first time since 1986, driven in part by renewed tensions between the United States and Iran that pushed oil prices higher. The currency was trading around ¥163.14 per US dollar on the morning of July 22 following Katayama's comments.
Singapore Dollar Climbs as Yen Weakness Broadens
The yen traded at around ¥126.31 per Singapore dollar at approximately 11.20am, compared with ¥126.23 earlier in the day.
The Singapore dollar has strengthened steadily against the yen throughout 2026, rising from levels around ¥121 to ¥123 at the start of the year to the mid-¥120s by July, with recent market readings reaching above ¥126 per Singapore dollar.
The move represents a significant shift for Singapore dollar holders. Compared with late 2025, when the Singapore dollar was trading closer to ¥114 against the yen, one Singapore dollar now buys substantially more yen.
For Singapore households, businesses and investors with yen exposure, the shift has direct implications for travel costs, Japanese imports, cross-border payments and foreign-currency investments.
Yen Weakness Extends Beyond the US Dollar
The yen's weakness is not limited to its performance against the US dollar or Singapore dollar. It has also remained weak against the euro, with EUR/JPY trading at elevated levels in recent months.
The broad-based depreciation suggests that pressure on the yen is being driven by wider structural and macroeconomic factors rather than a move isolated to the US dollar.
Against the US dollar, USD/JPY has remained close to the upper end of its 52-week range, with recent trading around ¥163 per US dollar. The absence of a sustained reversal has reinforced concerns that the yen's weakness could persist even as Japanese officials increase their warnings of possible intervention.
Markets Increasingly Sceptical of Japanese Intervention
Market participants, however, have become increasingly sceptical that repeated warnings from Japanese authorities will be enough to reverse the yen's decline.
“The market is ignoring it because they keep repeating the same message,” said Marito Ueda, president of SBI FX Trade. “While we can’t rule out the possibility of intervention, the market sees through the fact that the associated costs make it difficult to execute.”
Japan has already spent ¥11.73 trillion, equivalent to approximately S$92.9 billion, intervening in currency markets between April 28 and May 27 in an effort to support the yen.
Despite that intervention, the currency has continued to weaken and is now trading at its lowest level in four decades.
Fiscal Concerns and Interest Rates Weigh on the Yen
The yen's weakness reflects a combination of factors, including concerns over increased fiscal spending in Japan and expectations surrounding US interest-rate policy.
Investors have consequently remained largely unmoved by recent efforts from Japanese officials to strengthen the currency.
Last week, Katayama issued one of her strongest warnings in recent weeks, cautioning speculators that the finance ministry was prepared to take “decisive action” in response to excessive currency movements. The warning, however, failed to provide sustained support for the yen.
Other government measures have similarly had limited impact. Earlier this week, Japan's Cabinet approved an economic and fiscal plan that included a commitment to respecting the independence of the Bank of Japan, a move viewed as an attempt to reassure financial markets that the government would not seek to discourage further interest-rate increases by the central bank.
Japanese officials have also proposed measures aimed at encouraging greater domestic investment as part of broader efforts to support the country's economy and currency.
Middle East Tensions Add Further Pressure
Meanwhile, heightened geopolitical tensions in the Middle East could continue to put pressure on the yen.
Higher oil prices tend to weigh on Japan's currency because the country relies heavily on energy imports, increasing demand for foreign currency and raising the cost of imports.
“Heightened tensions in the Middle East typically support the dollar versus the yen through higher oil prices,” said Rodrigo Catril, senior foreign-exchange strategist at National Australia Bank.
“If, as we suspect, US-Iran tensions are set to worsen before they improve, then the dollar-yen heading towards 165 looks more likely than an imminent move back below 162,” he said.
Yen Faces a Difficult Road Ahead
For Japan, the challenge is becoming increasingly difficult. The government faces the prospect of intervening again to defend the yen, despite having already committed substantial financial resources to previous interventions that have failed to deliver a lasting reversal.
For Singapore, meanwhile, the yen's weakness presents a contrasting picture. A stronger Singapore dollar means greater purchasing power against the Japanese currency, benefiting travellers and businesses making payments into Japan.
However, the sharp move in SGD/JPY also underscores the heightened currency volatility facing companies with yen-denominated revenues, costs or settlement obligations.
With the yen now weakening across major currency pairs and Japanese authorities repeatedly warning of intervention, the market is entering a period in which the currency could remain under structural pressure while becoming increasingly vulnerable to sudden and potentially sharp reversals.
