In this article, we will organize the differences between “Japanese stocks (TOPIX) and US stocks (S&P500) ETFs vs. mutual funds,” which many investors are confused about, and explain the recommended 2026 portfolio according to AI.
1. Differences between TOPIX ETF (1306) and eMAXIS Slim TOPIX
Basic Comparison
Item|1306 TOPIX ETF|eMAXIS Slim TOPIX |—|—|—| |Type|ETF|Mutual Fund| |Purchase Location|Stock Exchange|Securities Company| |Trading Hours|Real-time|Once-daily NAV| |Accumulation|Somewhat inconvenient|Very easy| |Dividends|Received|Automatically reinvested| |NISA Accumulation|△|◎|
AI Evaluation
For long-term accumulation
✅ eMAXIS Slim TOPIX
is superior.
The reasons are: – Automatic accumulation is possible – Dividends are automatically reinvested – There is less hassle with trading.
On the other hand,
1306 is
.
2. Differences between 2558 ETF and eMAXIS Slim S&P500
Basic Comparison
Item|2558 ETF|eMAXIS Slim S&P500 |—|—|—| |Investment Target|S&P500|S&P500| |Type|ETF|Mutual Fund| |Dividends|Distributed several times a year|Automatically reinvested| |Trading|Real-time|NAV| |Accumulation|Somewhat inconvenient|Easy| |For Beginners|○|◎|
AI Evaluation
If you are only thinking about asset formation
✅ eMAXIS Slim S&P500
is superior.
Reason: – Dividend reinvestment is automatic – Setting up recurring investments is easy – It has the best compatibility with NISA.
AI Conclusion
Japanese Stocks
🏆 eMAXIS Slim TOPIX
US Stocks
🏆 eMAXIS Slim S&P500
For recurring investments, mutual funds are more advantageous than ETFs.
The strongest portfolio recommended by AI
Balanced type (recommended)
US Stocks (S&P500) 60%
Japanese Stocks (TOPIX) 30%
Cash
Image
Total Assets
┌─────────────────┐
│ S&P 500 60% │
│ ████████████ │
├─────────────────┤
│ TOPIX 30% │
│ ██████ │
├─────────────────┤
│ Cash 10% │
│ ██ │
└─────────────────┘
High-dividend focus type
S&P 500 50%
TOPIX 20%
1489 High-dividend ETF 30%
Image
┌─────────────────┐
│S&P 500 50% │
*Reason for adopting 1489: It allows for management more specialized in “dividend yield” than mutual funds, and receiving dividends in cash every quarter makes it easier to maintain investment motivation.
│██████████ │
├─────────────────┤
│TOPIX 20% │
│████ │
├─────────────────┤
│1489 30% │
│██████ │
└─────────────────┘
Features
-
Dividends increase. You can naturally hold Komatsu, Mitsubishi Corporation, Itochu, and mega-banks.
Growth-oriented (AI’s top recommendation)
eMAXIS Slim S&P 500 70%
eMAXIS Slim TOPIX 30%
Diagram
[AI Top Recommendation]
S&P 500 70%
■■■■■■■■■■■■■■
TOPIX 30%
■■■■■■
AI’s Final Conclusion
Rationale for the 70:30 ratio
The reason AI recommends this ratio lies in the “market capitalization ratio in the global economy” and the “optimal balance of currency diversification.”
1. Appropriate allocation of market capitalization: The U.S. accounts for approximately 60-70% of the global stock market, and by following this ratio, you can enjoy stable growth close to the market average.
2. Diversification of country risk: Rather than relying solely on the U.S., incorporating 30% Japanese stocks provides a buffer function to suppress asset volatility caused by exchange rate fluctuations (yen depreciation/appreciation).
3. Optimization of the Sharpe ratio: Based on historical data, the point where return per unit of risk becomes efficient is concentrated around this ratio when combining the growth potential of U.S. stocks with the undervaluation of Japanese stocks.
For everyone from investment beginners to advanced investors,
the most rational combination is
✅ eMAXIS Slim S&P 500: 70%
✅ eMAXIS Slim TOPIX: 30%
.
The reasons are the following 5 points: 1. You can capture U.S. growth potential. 2. You can also hold undervalued and high-dividend Japanese stocks. 3. Stocks like Komatsu, Mitsubishi Heavy Industries, and trading companies are naturally included. 4. Reinvestment efficiency is higher than with ETFs. 5. It is highly compatible with the new NISA. These are the benefits.
AI Rating: ★★★★★ (For long-term horizons of 20+ years)
⚠️ Important notes regarding investment
No principal guarantee: Stock investments carry price fluctuation risk, and there is a possibility that the investment principal may be lost depending on market performance.
Currency risk: Assets in US stocks carry the risk that their value in yen may change significantly due to exchange rate fluctuations.
Make your own final decisions: This article presents analysis results from an AI and does not recommend specific stocks or guarantee profits. Please make final investment decisions based on your own judgment.