Executive Summary
Key takeaways for investors and market participants:
– The Japanese yen has plunged to its lowest level in decades, driven immediately by Middle East conflicts disrupting oil supplies and exacerbating Japan’s energy dependency.
– Long-term structural factors, including the legacy of Abeconomics and a declining manufacturing base, have entrenched the yen’s weakness, leading to sustained trade deficits and inflationary pressures.
– Japan’s attempt to use currency depreciation as a tool for export revival has backfired, resulting in a vicious cycle of higher import costs and stagnant export growth.
– In a high-stakes gamble, Japan is turning to military exports as a potential economic savior, leveraging its industrial base but facing political and geopolitical hurdles.
– China’s response, including export controls on key materials, adds supply chain risks and complicates Japan’s strategy, highlighting escalating tensions in the region.
The Yen’s Freefall: A Perfect Storm of Geopolitics and Economics
Missiles flying over the Persian Gulf have seemingly shattered the tranquility of Tokyo Bay, sending the Japanese yen into a tailspin. Since late February, as U.S.-led strikes targeted Iranian assets, the yen has continuously weakened, breaching the 159 yen per dollar mark—a low not seen in over 18 months. Against the Chinese yuan, it fell to a record 4.32 yuan per 100 yen. For global investors focused on Asian markets, this yen depreciation event is not merely a currency fluctuation; it is a symptom of deeper malaise in Japan’s economy, with ripple effects across regional equities and trade dynamics.
The immediate catalyst is clear: heightened Middle East tensions have threatened oil shipments through the Strait of Hormuz, spiking crude prices. Japan, which imports over 90% of its oil from the region, faces soaring energy and transportation costs. Investors, fearing a blow to Japan’s manufacturing sector and rising inflation, have rushed to sell off the yen, alongside Japanese stocks and bonds. This trifecta of selling pressure underscores how external shocks can amplify domestic vulnerabilities, making the yen depreciation a critical watchpoint for portfolio managers.
Beyond the Headlines: A History of Decline
While the Middle East conflict ignited the latest sell-off, the yen’s woes are rooted in a decade-long downtrend. Since the advent of Abeconomics in 2012 under former Prime Minister Shinzo Abe (安倍晋三), the yen has slid from around 70 to over 120 per dollar by 2020, and now to historic lows. According to the Bank for International Settlements (BIS), the yen’s real effective exchange rate hit a record low of 67.73 in early 2026, meaning its purchasing power has shrunk to one-third of its peak 31 years ago. Once hailed as a safe-haven currency—rallying during the 2008 financial crisis and 2020 pandemic panic—the yen has lost its luster, now often leading declines during global turmoil.
This erosion has tangible impacts: Japanese tourism abroad has dwindled, with passport holders dropping from 24% to 17% of the population since 2019. More critically, inflation bites hard. Japan’s core CPI rose 3.1% in 2025, outpacing nominal wage growth of 2.3%, squeezing household budgets. From eggs to beef, prices have surged, with supermarkets resorting to selling cabbage by the leaf or chicken legs in pieces—a stark symbol of austerity. The Engel coefficient for multi-person households hit 28.6% in 2025, a 44-year high, reflecting heightened financial stress.
Decoding the Long-Term Drivers: From Lost Decades to Abeconomics
To understand the yen depreciation crisis, one must look beyond geopolitics to Japan’s economic fundamentals, particularly its trade dynamics. Post-World War II, the U.S. set a fixed exchange rate of 360 yen per dollar to boost Japanese exports, fueling a manufacturing boom. However, after the Plaza Accord in 1985 forced yen appreciation, Japan’s cost-competitiveness waned, prompting firms like Toyota and Sony to offshore production. This exodus hollowed out domestic industry, reducing Japan’s share of global manufacturing from over 20% in the 1980s to around 6% by 2021—a period famously dubbed the ‘Lost Decades’.
The Abeconomics Experiment: A Double-Edged Sword
In response, Abeconomics aimed to revive growth through aggressive monetary easing by the Bank of Japan (日本银行). By flooding markets with yen and maintaining ultra-low—even negative—interest rates, policymakers sought to cheapen the currency, boost exports, and attract tourists. Yet, this strategy proved to be a double-edged sword. While yen depreciation made Japanese goods cheaper abroad, it also raised import costs for energy, food, and components, given Japan’s reliance on foreign resources.
Critically, the export revival never materialized as hoped. Japan’s manufacturing prowess eroded amid competition from China and Southeast Asia, leading to persistent trade deficits. In fiscal 2024, the trade deficit ballooned to 5.22 trillion yen. Compounding this, Japan’s digital trade deficit—the gap between imports and exports of IT services—hit a record 6.46 trillion yen in 2024, highlighting a failure to capitalize on the tech revolution. Thus, the yen depreciation cycle became self-reinforcing: trade gaps forced a weak yen policy, which inflated import bills without spurring exports, widening deficits further.
The Currency Conundrum: Why Yen Depreciation Fails to Deliver
The theory that currency depreciation boosts exports relies on a robust industrial base, but Japan’s has frayed. Key sectors like automotive and electronics face stiff challenges from Chinese rivals, while emerging fields like renewables see Japan lagging. Moreover, the U.S. Federal Reserve’s interest rate hikes since 2022 have widened the yield gap with Japan, incentivizing carry trades where investors borrow cheap yen to buy higher-yielding dollar assets. This has shifted yen depreciation from a policy-driven tool to a market-driven plunge, with Japanese authorities constrained by massive public debt—over 1,342 trillion yen—that limits rate hike options.
The Inflationary Spiral and Social Fallout
Sustained yen depreciation has fueled an inflationary spiral, eroding living standards. Beyond economic data, social indicators tell a grim tale: crime rates have climbed from 610,000 incidents in 2020 to 774,000 in 2025, largely driven by theft. Public health issues, such as rising syphilis cases, underscore societal strain. For investors, this signals deeper risks: a consumer base under duress can dampen domestic demand, affecting corporate earnings and equity valuations in Japanese markets.
A Dangerous Gambit: Military Exports as Economic Salvation
Faced with chronic trade deficits, Japan is pivoting to a controversial solution: ramping up arms exports. With a latent military-industrial complex maintained by firms like Mitsubishi Heavy Industries (三菱重工業) and Kawasaki Heavy Industries (川崎重工業), Japan boasts production capabilities that outpace many Western allies. For instance, its Mogami-class frigates are launched faster than U.S. counterparts, and Japanese components are integrated into F-35 jets and Patriot missiles. In 2024, U.S.-Japan defense cooperation agreements formalized Japan’s role as a key supplier, with sales at top contractors soaring 40% year-on-year to $133 billion.
Political Hurdles and Geopolitical Risks
This shift requires overcoming political barriers, including revising Japan’s pacifist constitution and easing weapons export restrictions. Right-wing factions advocate deeper alignment with U.S. strategic interests, potentially turning Japan into a frontline state in regional tensions. However, this gamble carries immense risks. Relying on military exports ties Japan’s economic fate to geopolitical volatility and arms races, which could backfire if conflicts dampen global trade or trigger backlash.
Furthermore, China has responded assertively. In February, it imposed export controls on dual-use materials to 20 Japanese entities, including Mitsubishi and Kawasaki, disrupting supply chains. This move challenges Japan’s assumption of industrial autonomy and highlights how yen depreciation and military ambitions intersect with broader Sino-Japanese rivalry. Investors must watch for escalation, as supply chain disruptions could inflate costs further, exacerbating yen weakness.
Investment Implications and Forward Outlook
The yen depreciation crisis is more than a currency story; it reflects structural shifts with global ramifications. For institutional investors, several points are critical:
– Monitor energy prices and Middle East stability, as oil shocks directly impact Japan’s import bill and currency stability.
– Assess Japanese corporate earnings: exporters may see short-term benefits from a weak yen, but import-dependent sectors like retail and utilities face margin pressures.
– Evaluate geopolitical risks: Japan’s military export drive could alter regional dynamics, affecting markets across Asia. China’s countermeasures may disrupt tech and manufacturing supply chains.
– Consider policy responses: The Bank of Japan’s limited toolkit suggests yen volatility may persist, with potential interventions offering only temporary relief.
Strategic Takeaways for Market Participants
In the near term, yen depreciation may continue, driven by carry trades and trade imbalances. However, a sudden shift—such as Fed rate cuts or Japanese policy surprises—could trigger sharp reversals. Diversification in Asian equities is prudent, with attention to sectors less exposed to yen fluctuations. Long-term, Japan’s economic revival hinges on innovation beyond military exports, perhaps in areas like green technology or healthcare, but this requires structural reforms that remain elusive.
Navigating the New Normal in Asian Markets
The yen’s plunge to record lows is a stark reminder of how interconnected global events are—from Middle East conflicts to U.S. monetary policy—and how they converge on vulnerable economies. Japan’s experience underscores the limits of currency devaluation as a growth strategy, especially when foundational industries are in decline. The pivot to military exports introduces new variables, blending economics with geopolitics in ways that could heighten regional tensions.
For sophisticated investors, this environment demands vigilant analysis. Look beyond headline exchange rates to deeper indicators: trade balances, inflation trends, and political developments. Engage with local insights, as Japanese authorities may deploy unconventional measures to stem the yen’s fall. Ultimately, the yen depreciation saga offers lessons on resilience and adaptation in an era of shifting economic power. Stay informed, hedge exposures, and prepare for volatility—the bombs falling in the Persian Gulf will keep echoing in Tokyo Bay, and in portfolios worldwide.