A pair of major bank analyses has underscored the fragile state of the Japanese yen and cast doubt on the effectiveness of unilateral currency intervention. In separate notes to clients, HSBC and MUFG argued that without a meaningful shift in Bank of Japan (BoJ) policy, the yen’s weakness is likely to persist—potentially driving more investors toward decentralized alternatives like Bitcoin.
HSBC: Intervention needs active BoJ backing
HSBC strategists stressed that any future action by Japan’s Ministry of Finance to support the yen would only provide temporary relief unless the BoJ signals a credible path toward policy normalization. The yen has been trading near multi-decade lows against the US dollar, and HSBC noted that unilateral intervention without tighter monetary policy has historically failed. With the gap between US and Japanese interest rates still wide, defending the currency through direct market operations alone is expensive and unsustainable. The bank argued that sustainable support requires the BoJ to signal possible rate hikes or a reduction in its bond-buying program. Without such signals, markets will treat intervention as a stopgap rather than a structural change.
Japan spent roughly ¥9.2 trillion ($60 billion) in September and October 2022 when the yen breached 145 per dollar. Those operations temporarily calmed the currency, but the yen later resumed its slide as the BoJ maintained its ultra-loose stance. In early 2025, the yen briefly weakened beyond 160, prompting verbal warnings from finance ministry officials, though no large-scale intervention has been confirmed since late 2022.
MUFG: Inflation data and rate divergence add pressure
MUFG Bank highlighted the yen’s softening in early Asian trading on Wednesday, attributing it to heightened focus on inflation figures from both Japan and the United States. The bank’s strategists pointed to the view that US rates will stay elevated for longer, widening the interest rate differential that has plagued the yen. While Japanese inflation has moderated, core price pressures remain above the BoJ’s 2% target, keeping the central bank cautious. Meanwhile, the Federal Reserve has signaled it may need to hold rates higher to combat inflation, providing ongoing support to the dollar.
The analysis suggests that currency markets will remain volatile, with the USD/JPY pair highly sensitive to any surprise in inflation data. MUFG advised traders to monitor releases from both countries for near-term direction.
The combined warnings from two major financial institutions reinforce the idea that the yen’s fortunes are tied to BoJ policy. As long as the interest rate gap remains wide, the yen may face continued headwinds—potentially boosting demand for Bitcoin as a hedge against fiat depreciation.
