Japan’s yen slid to multi-year lows on Friday after Bank of Japan (BoJ) Governor Kazuo Ueda offered a vague outlook on future monetary policy, emboldening investors to increase bets against the currency. The moves, concentrated in euros and Australian dollars, reflect lingering doubts over Japan’s pace of rate hikes and have raised concerns for policymakers already wary of the yen’s weakness.

Market Reacts to BoJ’s Data-Dependent Guidance

The BoJ raised its benchmark interest rate to 0.75%, a three-decade high, in a widely anticipated move. However, Ueda’s comments that future decisions would be “data-dependent” and made on a meeting-by-meeting basis offered little clarity on Japan’s neutral rate or the pace of further tightening.

Traders interpreted the cautious tone as a green light for so-called “carry” trades, borrowing yen at low rates to fund higher-yielding assets abroad. The yen fell roughly 1% to 157 per dollar during the London session and dropped to a record low of 183.99 per euro, despite Japanese yields rising to new highs.

Tareck Horchani, head of prime brokerage dealing at Maybank Securities in Singapore, noted that investors are focusing on currencies like the Aussie and South African rand for attractive carry opportunities, while positions against the euro reflect Japan’s slow rate adjustment relative to Europe.

Structural Pressures on the Yen

Friday’s moves highlight the persistent structural challenges weighing on the yen. Domestic companies and the government remain uneasy as a weaker currency pushes up import costs for sensitive items like energy and food. Finance Minister Satsuki Katayama recently warned that the negative effects of yen weakness are beginning to outweigh the positives, with many domestic firms signaling a preferred exchange rate of around 133.5 per dollar, roughly 18% stronger than current levels.

Analysts say reversing a five-year downward trend will require more than incremental BoJ hikes. Naka Matsuzawa, a macro strategist at Nomura, described the weakness as “a delayed effect of over-easing over the last decade” and argued that structural reforms, deregulation, and measures to attract investment will be necessary to support the currency sustainably.

Investor Positioning and Speculation

Data from early December—albeit partially delayed by the U.S. government shutdown—shows that a record long yen position accumulated in April had largely unwound. Meanwhile, traders have built overweight positions in Aussie/yen and euro/yen, reaching levels not seen in five years. Bart Wakabayashi, branch manager at State Street in Tokyo, commented: “I think that the yen will remain under pressure,” reflecting expectations of continued weakness.

Some analysts believe near-term interventions, such as selling dollars to stabilize the yen, could offer temporary relief. However, Peiqian Liu, Asia economist at Fidelity International, cautioned that without a clear hawkish signal from the BoJ or government, such moves are unlikely to produce lasting gains.

Carry Trades Drive Sentiment

The cautious messaging from Ueda has been welcomed by carry traders, who can now maintain positions with less concern about abrupt BoJ action. “For those who already have carry positions, they can get relaxed and go on holidays,” said one trading head from a large bank, highlighting the market’s focus on yield rather than currency stability.

As the yen hovers near its weakest levels in years, investors and policymakers alike are watching closely. With structural reforms, fiscal strategies, and central bank guidance all playing a role, the path to a stronger, more stable yen appears increasingly dependent on coordinated policy efforts beyond incremental rate adjustments.