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Executive Summary
Despite the Bank of Japan's (BOJ) benchmark interest rate hike, the Japanese stock market has staged a historic rally, with the Nikkei 225 index surpassing the 71,000 level for the first time in history.
This robust performance is a direct result of the ultra-weak yen, which has plunged past 161 yen per dollar, maximizing the earnings outlook for export-driven companies.
As the tri-polar decoupling between the US, Europe, and Asia deepens, Japan's advanced semiconductor, AI tech, and traditional export stocks are reaping powerful benefits.
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Current Status Overview
As of today, June 20, 2026, global stock markets are showing distinct differences in sentiment across regions.
In South Korea, the KOSPI closed at 9,052.42 and the KOSDAQ at 966.59. On the Daily Stock Fear & Greed Index, the KOSPI currently sits in the "Neutral" zone (51.9).
Conversely, while the US Nasdaq closed at 26,517.93, its Fear & Greed Index remains in the "Fear" territory (37.3), contrasting sharply with the Japanese stock market, which is breaking all-time highs.
On June 16, the Bank of Japan (BOJ) raised its benchmark interest rate to 1.0% at its monetary policy meeting, setting the rate at its highest level in 31 years.
Nevertheless, the yen-to-dollar exchange rate has surged past the 161 yen mark—the foreign exchange authority's threshold for intervention—reaching a high of 161.80 yen, accelerating the depreciation of the currency.
This is driven by the persistent interest rate gap between the US and Japan, alongside a continuous outflow of carry-trade funds as individual investors expand their overseas investments via NISA.
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Financial Analysis
The weak yen is serving as a powerful financial buffer for Japan's flagship exporters.
In fact, Japan's exports in May surged 17% year-on-year, significantly beating market expectations.
The automotive and precision machinery sectors are structured to reap tens of billions of yen in operating profit improvements for every 1-yen depreciation against the dollar.
Notably, tech companies positioned within the global AI and semiconductor value chains are registering robust revenue growth.
Furthermore, easing geopolitical tensions—such as the agreement between the US and Iran to lift the blockade on the Strait of Hormuz—have stabilized international oil prices, lessening the cost burden and protecting margins for energy-import-dependent Japanese firms.
With increased export sales combined with favorable FX translation effects, the earnings per share (EPS) growth rate for major exporters is projected to reach double digits.
Valuation
Although the Nikkei 225 has surpassed the 71,000 mark, analysts evaluate that its valuation remains attractive compared to other major global indices.
Compared to the S&P 500 or the European STOXX 600, yen-denominated assets appear relatively cheap to foreign investors.
As profit forecasts for major exporters are continuously revised upward, the overvaluation pressure in terms of price-to-earnings (P/E) ratios is being diluted.
In addition, corporate governance reforms spearheaded by the Tokyo Stock Exchange (TSE) have borne fruit, boosting shareholder returns (share buybacks and dividend increases) and supporting buying momentum.
However, fatigue from the short-term surge and lackluster value improvement among domestic demand-driven companies with high raw material import ratios leave the challenge of industry polarization.
| Category | Japan's Nikkei 225 | US Nasdaq | South Korea's KOSPI |
|---|---|---|---|
| **Index Status (Close)** | Surpassed 71,000 | 26,517.93 | 9,052.42 |
| **Proprietary Fear & Greed Index** | Not verified for today (based on latest value) | Current Fear (37.3) | Current Neutral (51.9) |
| **Key Drivers** | Yen weakness & export boom | Big tech & AI momentum | Semiconductor sector recovery & exports |
| **Policy Rate** | 1.0% (BOJ Policy Rate) | 5.25% - 5.50% (US Fed) | 3.50% (BOK Base Rate) |
Expert & Institutional Analysis
Global investment banks (IBs) analyze that although the BOJ raised its policy rate to 1.0%, the impact on the index was limited because the decision was communicated predictably to the market.
Instead, the prevailing view is that global risk-on sentiment was revitalized by agreements easing US-Iran tensions, which strengthened foreign capital inflows into Japanese equities.
Experts project that the scenario of further gains for the Nikkei index, powered by the weak yen, remains valid until the US-Japan interest rate gap narrows.
Foreign exchange market experts are closely watching for the possibility of direct intervention by the Japanese Ministry of Finance if the USD/JPY rate breaches the 161.80 yen level.
Some institutions advise preparing for a sharp exchange rate reversal, warning that the yen has entered an irrational overshooting zone.
Risk Factors
The most immediate risk is direct intervention in the foreign exchange market by the Japanese government (buying physical yen and selling dollars).
If the government deploys tens of trillions of yen to artificially lower the exchange rate, the yen could pivot to a short-term rally, causing export stocks to undergo a correction.
Minister of State for Financial Services Satsuki Katayama has elevated verbal interventions near the 161.80 yen mark, stating, "We stand ready to take decisive action."
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Moreover, an excessively weak yen is a double-edged sword; it drives up the cost of imported raw materials, reducing the real income of Japanese households and threatening to trigger a domestic economic recession.
Should the BOJ be forced to hike interest rates rapidly to control inflation, global yen carry trade positions—which thrive on cheap borrowing costs—could unwind, exacerbating market volatility.
Investment Perspective
The Nikkei 225 stabilizing above 71,000 can be seen as the combined result of enhanced export competitiveness from the ultra-weak yen and a favorable macroeconomic environment.
In the short term, whether authorities intervene near the 161.80 yen mark and the direction of the yen carry trade will be the pivotal variables determining the sustainability of the Japanese stock market's run.
While yen-denominated assets serve as an attractive portfolio diversifier within the tri-polar US-Europe-Asia decoupling, a cautious, staggered entry strategy is reasonable, taking into account currency loss risks and commodity price volatility.
Investor Checklist Q&A
Q1. Why does the yen remain weak despite the Bank of Japan (BOJ) raising interest rates?
A1. Although Japan raised its benchmark rate to 1.0%, the gap with the US policy rate (in the 5% range) remains wide, prompting capital to flow out to the US in search of higher yields.
Q2. How does a weak yen impact the financials of Japanese exporters?
A2. It provides a significant FX translation benefit, boosting earnings when dollar-denominated revenue is converted back into yen. It also enhances price competitiveness in overseas markets, leading to major improvements in overall earnings.
Q3. What was the driving force behind the Nikkei 225 surpassing the historic 71,000 level?
A3. It was driven by a confluence of strong earnings among major exporters due to the weak yen, a global rally in AI tech stocks, and improved investor sentiment stemming from easing geopolitical risks.
Q4. What is the specific threshold for intervention by Japanese foreign exchange authorities?
A4. With the USD/JPY rate rising near 161.80 yen, it is close to the 161.95 yen level where intervention occurred in July 2024, meaning the likelihood of actual intervention by the authorities is highly elevated.
Q5. What exactly is the risk of a yen carry trade unwind?
A5. It refers to the phenomenon where investors who borrowed cheap yen to invest in high-yield foreign assets withdraw their funds when Japan raises interest rates or the yen surges. This unwind can trigger a synchronized decline in global asset prices.