Robo-Advisors in Japan: WealthNavi, THEO, and More
Automated investing in Japan — how robo-advisors work, fees, tax treatment, and whether they're worth it for foreigners.
Quick Answer
Robo-advisors like WealthNavi and THEO offer automated, diversified investing in Japan. Fees are typically 1% per year (higher than DIY index funds at 0.05-0.1%). They're convenient for beginners but not the cheapest option. If you're comfortable picking your own index funds in NISA, you'll save significantly on fees.
What are robo-advisors? — ロボアドバイザーとは
Robo-advisors (ロボアドバイザー) are automated investment services that build and manage a diversified portfolio for you. Instead of picking individual stocks or funds yourself, you answer a few questions about your risk tolerance and goals, and the algorithm does the rest — selecting investments, allocating your money across asset classes, and rebalancing periodically.
Think of it as hiring a financial advisor, except the "advisor" is software that runs 24/7 and charges far less than a human (though still more than doing it yourself). In the US, services like Betterment and Wealthfront popularized this model. In Japan, WealthNavi (ウェルスナビ) and THEO (テオ) are the two dominant players.
Robo-advisors in Japan typically invest in global ETFs — exchange-traded funds that track major stock and bond indices around the world. This gives you instant diversification across US stocks, international stocks, bonds, real estate, and sometimes gold or commodities, all through a single service.
How robo-advisors work — 仕組み
The process is designed to be as hands-off as possible:
Risk assessment
You answer 5-8 questions about your age, income, investment experience, and how much risk you're comfortable with. The service assigns you a risk score (e.g., WealthNavi uses a 1-5 scale, where 1 is conservative and 5 is aggressive).
Automatic allocation
Based on your risk profile, the algorithm allocates your money across a diversified portfolio of global ETFs. A higher risk score means more stocks and fewer bonds. For example, a risk-5 portfolio on WealthNavi might be 80% stocks and 20% bonds/gold, while risk-1 would be closer to 50/50.
Automatic rebalancing
Over time, some investments grow faster than others, throwing your target allocation off balance. The robo-advisor automatically rebalances — selling overweight positions and buying underweight ones — to maintain your target risk level. This typically happens semi-annually or when allocations drift beyond a threshold.
Ongoing management
You can set up automatic monthly deposits (積立), and the service handles everything. Some services also offer tax-loss harvesting features (like WealthNavi's DeTAX) that sell losing positions to offset gains and reduce your tax bill.
WealthNavi (ウェルスナビ) — Japan's largest robo-advisor
WealthNavi is the clear market leader in Japan's robo-advisor space, managing over ¥1 trillion in assets. Founded in 2015, it's publicly traded on the Tokyo Stock Exchange (TSE: 7342) and is the most trusted name in automated investing in Japan.
Key features:
- Annual fee: 1.1% (tax included) on assets under management. Reduced to 0.55% for balances over ¥30M
- Minimum investment: ¥10,000 (one-time) / ¥1,000 for automatic monthly contributions
- Portfolio: 6-7 global ETFs (US stocks via VTI, international stocks via VEA, emerging markets via VWO, US bonds via AGG, gold via GLD, real estate via IYR)
- DeTAX feature: Automatic tax-loss harvesting that strategically sells losing positions to offset gains, potentially saving you thousands in taxes per year
- おまかせNISA: WealthNavi's NISA-compatible service — invest within NISA's tax-free limits while using WealthNavi's automated management
- English support: Partial — the app and website have some English elements, but many pages and customer support are Japanese-only
WealthNavi's biggest advantage is its simplicity and track record. You deposit money, choose a risk level, and forget about it. The DeTAX feature is genuinely useful for taxable accounts, as it can recover a meaningful portion of the 1% fee through tax savings. However, this benefit disappears if you invest through NISA (since NISA gains are already tax-free).
For Foreigners
WealthNavi accepts applications from foreign residents with a valid 在留カード and マイナンバー. The signup process is in Japanese, but navigable with browser translation. Customer support is primarily in Japanese, though email inquiries in English may receive responses.
THEO (テオ) — by SMBC Nikko Securities
THEO is Japan's second-largest robo-advisor, operated by SMBC日興証券 (one of Japan's major brokerages). It positions itself as a beginner-friendly, low-barrier-to-entry option.
Key features:
- Annual fee: 0.715% - 1.1% (tax included) — lower fees available through the THEO Color Palette discount program based on deposit history and usage of linked services
- Minimum investment: ¥1 — the lowest minimum in Japan's robo-advisor market, making it extremely accessible
- Portfolio: Up to 231 ETFs across global stocks, bonds, and real estate — significantly more diversified than WealthNavi
- Color Palette: THEO's unique fee discount system. Your fee color ranges from "white" (1.1%) down to "blue" (0.715%) based on how much you deposit and whether you use linked services like dカード or docomo
- THEO+docomo: Partnership with NTT docomo that gives dポイント on your investment balance (0.01-0.1% per year in points)
- Tax optimization: Similar to WealthNavi's DeTAX, THEO offers automatic tax-loss harvesting for taxable accounts
- English support: No — THEO is Japanese-only for both the app and customer support
THEO's biggest draw is the ¥1 minimum investment — you can literally start with a single yen. This makes it an easy first step for complete beginners. The Color Palette discount system can bring fees down significantly if you're a heavy docomo user, though the base fee is comparable to WealthNavi.
Other robo-advisor options — その他の選択肢
While WealthNavi and THEO dominate the market, there are some notable alternatives:
SUSTEN (サステン)
The most unique fee model in the market: 0% base fee + performance-based fee only on profits that exceed your previous high-water mark. This means you pay nothing during flat or down markets — you only pay when you're actually making money. The performance fee is approximately 1/6 to 1/8 of profits. Minimum investment is ¥100,000. Not NISA-compatible. Japanese only. Best for investors who want to avoid paying fees during market downturns.
Rakuten Wrap (楽天ラップ)
Rakuten Securities' robo-advisor offering. Two versions: 楽ラップ (standard, 0.715% fee) and a fixed-fee option. Integrates with the Rakuten ecosystem — earn and use 楽天ポイント. Minimum ¥10,000. Japanese only. Good if you're already deep in the Rakuten ecosystem and want everything in one place.
ON COMPASS (マネックス・アセットマネジメント)
Operated by Monex Group. Annual fee of approximately 0.9775% (tax included). Minimum ¥1,000. Uses a "smart portfolio" approach with global ETFs. Less popular than WealthNavi or THEO, but backed by a major brokerage. Japanese only.
Fee comparison — 手数料比較
Fees are the single most important factor in long-term investment returns. Here's how the major robo-advisors compare — and how they stack up against doing it yourself:
| Service | Annual fee | Minimum | NISA | English |
|---|---|---|---|---|
| WealthNavi | 1.1% | ¥10,000 | Yes (おまかせNISA) | Partial |
| THEO | 0.715% - 1.1% | ¥1 | Yes | No |
| SUSTEN | 0% base + performance | ¥100,000 | No | No |
| DIY (eMAXIS Slim) | 0.05% - 0.1% | ¥100 | Yes | Via broker |
The fee difference is stark. Let's put it in real numbers: on a ¥5,000,000 portfolio, WealthNavi charges approximately ¥55,000 per year in fees. The same amount invested in eMAXIS Slim 全世界株式 through a NISA account at SBI Securities would cost roughly ¥2,900 per year. That's a difference of ¥52,100 per year — or over ¥500,000 over a decade, even before compounding the fee savings.
Fee Impact Over Time
A 1% annual fee may sound small, but it compounds against you. Over 20 years, a 1% fee reduces your total returns by roughly 18% compared to a 0.05% fee. On a ¥10M portfolio growing at 7% annually, that's a difference of approximately ¥3.5M in lost returns over two decades.
Tax treatment — 税金の扱い
Understanding how robo-advisor gains are taxed is crucial for evaluating whether they're worth the fee:
Taxable accounts (特定口座): Both WealthNavi and THEO offer 特定口座 (specified accounts) with 源泉徴収あり (automatic tax withholding). This means the service automatically calculates and withholds the 20.315% tax on gains (15% income tax + 0.315% reconstruction tax + 5% resident tax) when positions are sold. You generally don't need to file 確定申告 for these gains.
Dividends: ETF dividends received inside the robo-advisor are also taxed at 20.315%. For US-listed ETFs (which is what most robo-advisors use), there's an additional wrinkle: US dividend withholding tax of 10% is deducted first, then Japanese tax is applied. You may be able to claim the 外国税額控除 (foreign tax credit) on your 確定申告 to recover some of the double taxation.
NISA accounts: If you invest through おまかせNISA (WealthNavi) or THEO's NISA option, all gains and dividends within the NISA allocation are completely tax-free. No 20.315% tax, no filing required. This is the most tax-efficient way to use a robo-advisor, though it means you can't benefit from DeTAX (tax-loss harvesting is irrelevant when gains aren't taxed).
Tax Tip
If you use a robo-advisor with a taxable 特定口座, the automatic rebalancing creates taxable events — every time the service sells an ETF to rebalance, you realize a gain (or loss). This is handled automatically with 源泉徴収あり, but it's worth knowing that rebalancing can accelerate your tax liability compared to a buy-and-hold approach.
NISA compatibility — NISAとの連携
One of the biggest developments in Japan's robo-advisor market has been NISA integration. Here's how the major services handle it:
WealthNavi's おまかせNISA: WealthNavi offers a dedicated NISA service where your investments are automatically allocated between NISA and taxable accounts. The service prioritizes using your NISA allowance first (up to ¥3.6M/year), then overflows into a taxable account. Rebalancing within NISA is limited to avoid wasting your tax-free allowance on sells.
THEO's NISA: THEO also offers NISA-compatible investing through its partnership with docomo (THEO+docomo). The service manages your NISA and taxable portions separately, optimizing for tax efficiency.
The catch: If you use your NISA account with a robo-advisor, you can't use it anywhere else. You only get one NISA account per year, so using it with WealthNavi means you can't also have a NISA at SBI or Rakuten. This is a significant trade-off: you're paying 1% to have someone manage your NISA, when you could invest in a single index fund (like eMAXIS Slim 全世界株式) for 0.05% with almost zero effort.
Consider Carefully
Using a robo-advisor for NISA eliminates the DeTAX benefit (since NISA gains aren't taxed anyway) while still charging the full 1% fee. This means you're paying 1% purely for portfolio construction and rebalancing — something you can replicate for free by buying a single all-world index fund and doing nothing.
Robo-advisor vs DIY investing — ロボアド vs 自分で投資
This is the essential question: is the convenience of a robo-advisor worth the extra cost? Let's compare honestly:
| Robo-advisor (e.g., WealthNavi) | DIY index fund (e.g., eMAXIS Slim in NISA) | |
|---|---|---|
| Annual cost | ~1% | ~0.05% |
| Effort required | Zero (fully automated) | ~30 minutes/year (set up auto-invest, check once) |
| Diversification | 6-7 ETFs across asset classes | 1 fund = 3,000+ stocks globally |
| Rebalancing | Automatic | Not needed with single all-world fund |
| Tax optimization | DeTAX (taxable account only) | NISA = no tax at all |
| Knowledge needed | Almost none | Basic (choose fund, set up auto-invest) |
| Cost on ¥5M (20 years) | ~¥1.1M in fees | ~¥58K in fees |
Our honest assessment: Robo-advisors are a good option for people who would not invest at all otherwise. If the choice is between WealthNavi at 1% or leaving your money in a 0.001% savings account, WealthNavi wins by a landslide. The automation removes all friction and prevents emotional decision-making during market downturns.
However, for anyone willing to spend 30 minutes learning how to open a NISA account and set up automatic monthly investments in a single index fund like eMAXIS Slim 全世界株式, DIY investing is dramatically cheaper. The "work" involved is: open a NISA account at SBI or Rakuten, select eMAXIS Slim 全世界株式, set up a monthly auto-invest of ¥X, and then do nothing for years. That 30-minute setup saves you roughly 0.95% per year in fees — which on a ¥10M portfolio is ¥95,000 annually.
The verdict: If you're reading this guide, you're probably knowledgeable enough to do it yourself. NISA + eMAXIS Slim (or a similar index fund) gives you global diversification, zero tax on gains, and fees that are 10-20x cheaper than a robo-advisor. The robo-advisor's value proposition is convenience and behavioral management — not better returns.
Frequently Asked Questions — よくある質問
Can foreigners use WealthNavi or THEO?
Yes. Foreign residents of Japan with a valid 在留カード and マイナンバー can open accounts with both services. The application and interface are primarily in Japanese. WealthNavi has partial English support; THEO is Japanese-only. US citizens may face additional restrictions due to FATCA (Foreign Account Tax Compliance Act) — check with the service directly.
Can I withdraw my money anytime?
Yes. Unlike iDeCo, there is no lock-up period with robo-advisors. You can sell your investments and withdraw funds at any time. Processing typically takes 3-5 business days. There are no withdrawal fees, though selling may trigger a taxable event in a non-NISA account.
Do robo-advisors outperform index funds?
Generally, no. After fees, robo-advisors tend to slightly underperform a simple all-world index fund because they're investing in similar underlying ETFs but charging an additional 1% layer of fees. The diversification across stocks, bonds, and gold may reduce volatility, but it also typically reduces long-term returns compared to a 100% stock index fund. DeTAX can partially offset the fee in taxable accounts, but not fully.
What happens to my robo-advisor account if I leave Japan?
Policies vary by service. Generally, you need to notify the service before you leave. WealthNavi requires you to close your account or sell your holdings if you lose Japanese residency. If you're using おまかせNISA, the NISA portion follows standard NISA rules (can be frozen for up to 5 years). Contact your robo-advisor well in advance of any international move.
Is there a risk of losing all my money?
Market risk exists, but total loss is extremely unlikely. Robo-advisors invest in broadly diversified global ETFs — for you to lose everything, the entire global economy would have to collapse to zero. However, your portfolio can and will lose value during market downturns. A balanced portfolio might drop 20-30% during a severe recession. Your funds are held in a 信託口座 (trust account) separate from the company's assets, so even if WealthNavi or THEO goes bankrupt, your investments are protected up to ¥10M by the 投資者保護基金 (Investor Protection Fund).
Can I use a robo-advisor AND invest on my own?
Yes. You can use a robo-advisor for part of your portfolio and invest independently for the rest. For example, you could use WealthNavi for your taxable investments (to benefit from DeTAX) while managing your own NISA account at SBI Securities with low-cost index funds. Just remember: you can only have one NISA account, so if your NISA is at SBI, you can't also use おまかせNISA at WealthNavi.
Have a question about investment?
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Sources
- 金融庁 ロボアドバイザー関連情報 (fsa.go.jp)
- 各サービス公式サイト (WealthNavi, THEO, SUSTEN)
- 所得税法 第120条 (確定申告義務)
- 租税特別措置法第37条の14 (NISA非課税規定)
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