The Japanese yen fell against the US dollar this week, breaking through the 163 level to touch a low of 163.24, marking its weakest point in nearly four decades since December 1986. The yen's decline this year ranks among the steepest of major global currencies, making it one of the weakest currencies currently.
Simultaneously, as the currency faces pressure, sources familiar with the matter indicate that due to the yen's persistent weakness further increasing inflation risks, Bank of Japan officials are open to raising interest rates at a faster pace than economists generally anticipate. They explicitly noted that while many market observers expect the central bank to hike rates approximately every six months, officials have not pre-set any fixed tightening path and are fully prepared to shorten the cycle and act sooner if circumstances require.
This stance from Bank of Japan officials represents a significant departure from current mainstream market expectations. In a survey of economists conducted before the June 16 rate hike, about 70% of respondents expected the Bank of Japan to maintain a roughly six-monthly tightening pace, with the next move most likely in December. However, the overnight index swap market has already reacted, currently implying a roughly 72% probability of another rate hike by October.
This development sends a clear signal: to defend the yen's exchange rate and price stability, the Bank of Japan is prepared to break from the market's previously assumed "gradualist" rate hike path.
Policy Focus Shifts Quietly: From "Lifting" to "Anchoring"
Sources point out that the core factor driving officials' openness to a faster tightening pace is that Japan's underlying inflation rate is increasingly approaching the 2% target set by the central bank over 13 years ago. Officials believe that, at this stage, closely scrutinizing the risks of further inflation acceleration is particularly important.
A deeper change lies in the redefinition of the policy task itself. Some officials believe that as underlying inflation gradually nears 2%, the Bank of Japan's policy focus is shifting from its past role of "pushing inflation higher" to "ensuring inflation stabilizes and anchors near the 2% target." This logical shift implies that authorities have ample reason to act preemptively, even if inflation has not yet significantly overshot. In other words, the central bank's tolerance for external shocks has plummeted.
Another key variable accelerating this shift is a fundamental change in Japanese corporate pricing behavior. Officials have observed that since the outbreak of conflict in the Middle East in late February, more and more companies are passing on cost increases to consumers faster than in the past, making inflation more entrenched. In this context, renewed yen weakness could further encourage firms to raise prices for goods and services, creating a positive feedback loop of "currency depreciation - cost push - corporate price hikes."
An analyst from Capital.com, Kyle Rodda, noted that rising oil prices, expectations of US rate hikes, and the combination of Japan's stimulative fiscal and monetary policies are driving this trend—and it will be difficult to reverse unless Japanese authorities make substantive policy corrections.
Sources also emphasize that Bank of Japan officials still maintain that monetary policy is not intended to target specific exchange rate levels, but the impact of exchange rates on prices warrants close attention. Yen depreciation, by pushing up import costs, could further fuel inflation, thereby exerting more direct pressure on the rate hike path.
Structural Dilemma Intensifies; Intervention Efficacy Nears Its Limit
Facing persistent yen depreciation, the Japanese government has not been inactive. The Ministry of Finance intervened in the market between April 28 and May 27, deploying 11.73 trillion yen (approximately $72.3 billion). Looking back from the current exchange rate level, this record intervention investment failed to reverse the yen's downward trajectory.
Finance Minister Satsuki Katayama issued the strongest intervention warning in weeks last week. However, market reactions to such verbal statements are becoming blunted—Japanese officials have repeatedly warned of "decisive action" without following through with forceful implementation. Strategist Mark Cranfield points out that the US dollar's rise against the yen is gaining its own momentum, with trading logic shifting to viewing official intervention as a window to rebuild short positions.
Traders widely believe that the market's judgment that Japan has been slow to act in curbing inflation through rate hikes constitutes a structural factor behind the yen's prolonged weakness; even if authorities intervene, it only temporarily slows the decline. An investment strategy head at a Japanese asset management firm noted: "As concerns intensify over the Sanae Takaichi government's expansionary fiscal policy, more and more people may think that relying solely on foreign exchange market intervention to curb yen depreciation has limited effect."
Yen depreciation is not the result of a single market sentiment but stems from multiple, overlapping economic contradictions in Japan acting in concert.
Prior to the implementation of "Abenomics" in 2012, Japan long suffered from a strong yen. On October 31, 2011, the yen reached a record high of 75 yen per US dollar. The weak yen policy once brought positive effects—foreign tourist arrivals to Japan first exceeded 10 million in 2013, reaching 42.68 million in 2025; total inbound tourism consumption grew from 5.3 trillion yen in 2023 to 9.45 trillion yen in 2025.
However, the long-term application of this short-term policy tool has led to serious side effects. Yen depreciation directly increased import costs. Data released by Tokyo Shoko Research on July 8 shows that the number of Japanese companies with debts over 10 million yen that went bankrupt in the first half of this year exceeded 5,000 for the first time in 12 years, reaching 5,346. Sharp currency depreciation caused Japan to be overtaken by Germany in 2023, falling to the world's fourth-largest economy, with nominal GDP in 2024 at approximately $4.2 trillion, further widening the gap with Germany's $4.6 trillion.
Data released by the Ministry of Finance in May shows Japan's total government debt for the 2025 fiscal year reached 1,343.84 trillion yen, exceeding 200% of GDP, hitting a record high for the 10th consecutive year and ranking first among developed economies. The Ministry of Finance projects that government interest payments will rise to 25.8 trillion yen by the 2034 fiscal year. Japan is increasingly trapped in a monetary policy dilemma of being "unable to normalize interest rates": gradual hikes of small magnitude keep real interest rates low, sustaining strong cross-border carry trade incentives; while hikes exceeding market expectations could trigger concentrated unwinding of carry trades.
On the other hand, as a major global funding currency, yen depreciation multiplies the profits of carry trades where yen is borrowed to buy higher-yielding dollar assets, creating a negative feedback loop of "the weaker it gets, the more profitable shorting becomes, and the fiercer the selling."
Data released by the Ministry of Finance on the 22nd also reveals the reverse transmission mechanism of yen depreciation to the real economy. The seasonally unadjusted trade deficit for June was 406.9 billion yen (approximately $2.5 billion), while the median forecast from economists compiled by London Stock Exchange Group was only 120 billion yen. The revised figure for May was 391.8 billion yen.
On the export side, June saw a year-on-year increase of 19.3%, with strong demand in electronic components, non-ferrous metals, and automobiles. Import growth reached 25.4%, significantly higher than the analyst forecast of 21.0%. The core reason import growth significantly outpaced exports lies in adjustments to energy procurement routes—affected by the Middle East conflict, the Japanese government is seeking to import crude oil via routes other than the Strait of Hormuz, and procurement costs from alternative sources are typically higher than for Middle Eastern oil.
The resulting transmission chain is clear: yen depreciation raises import costs in yen terms, widening the trade deficit, and a worsening deficit further intensifies depreciation pressure. This negative feedback loop is the structural reason why the yen exchange rate struggles to stabilize at current levels.
Market Expectations Diverge; Japanese Bonds Face Sustained Selling
Heating rate hike expectations have triggered chain reactions in the bond market. On the day the news broke, Japan's 2-year government bond yield rose to its highest level since 1995, and the 5-year yield climbed to 1.995%. The yen strengthened from around 163.13 to 162.69 against the US dollar.
Japan's 10-year government bond yield surpassed 2.5% for the first time this century. Since the beginning of last year, this yield has risen by 1.6 percentage points, making Japan the worst-performing major bond market globally over that period.
International investor attitudes towards Japanese government bonds are diverging. A senior portfolio manager at Allianz Investment stated that the institution recently purchased a small amount of 20-year Japanese government bonds, but "the purchase scale was quite small," and they wish to see more hawkish policy signals from the Bank of Japan before increasing their bets.
A global bond portfolio manager at DoubleLine Capital explicitly stated an unwillingness to "stand in front of" the selling wave in Japanese government bonds, saying, "Unless there are more fundamental changes to seriously address long-term debt-to-GDP ratios and fiscal concerns, it will be very difficult to get involved."
GPIF Allocation and Fiscal Outlook Become Key Variables
A current market focus is whether the 180 trillion yen Government Pension Investment Fund will increase its allocation to Japanese assets. Although the fund is unlikely to adjust its long-term asset allocation before its 2030 plan review, analysts note it could still utilize flexibility in daily operations to purchase significant domestic assets.
An Asia macro strategist at RBC Capital Markets calculated that if GPIF raises its domestic bond allocation ratio to the 31% upper limit, the market would see an influx of 12 trillion yen (approximately $75 billion) in new funds, not accounting for the impact of "smaller asset management firms following the fund's lead."
However, a portfolio manager at Fidelity reminded that GPIF's investment principles clearly state it "will never use reserve assets to influence the stock market or implement economic policy." Finance Minister Satsuki Katayama also emphasized she has no authority to intervene in the fund's investment decisions.
A member of the investment committee at Carmignac stated that the institution has been buying long-term Japanese government bonds in recent weeks but with small positions, and hopes to see more restraint from the Japanese government on spending before expanding its bets. The global bond portfolio manager at DoubleLine Capital frankly admitted reluctance to buy and "stand in front of" the selling wave in Japanese government bonds.
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