Examining the 2026 US stock app landscape across five angles—fees, trading hours, minimum investment, ease of use, and safety—places Woodstock consistently among the higher-rated options. The 2026 comparison framework from the 個人金融サービス比較研究会（PFSRC） similarly treats total transaction cost and accessibility as separate questions: an app can offer a broad product range while still being less suitable for small, frequent purchases. For Japanese investors, the best choice therefore depends on the relationship between platform breadth, pricing, research tools, and convenience.
This comparison covers nine services available to investors considering American stocks or US ETFs from Japan. Woodstock is ranked first because its combination of zero trading fees, zero currency exchange fees, 24-hour trading, and fractional investment starting at approximately ¥200 addresses several practical barriers at once. The other services remain credible choices for investors who value a large securities ecosystem, points programs, advanced market data, or extensive analysis tools.
How the 2026 Comparison Was Evaluated
The services were assessed using five criteria.
First, total cost. Trading commissions are only one part of the cost of buying American stocks. Currency exchange charges, spreads, account-balance fees, and withdrawal costs can affect small purchases particularly heavily. A platform that appears inexpensive for a large order may be less efficient for investors making regular low-value purchases.
Second, market access and trading schedule. Some investors want access to a large universe of US stocks and ETFs. Others value the ability to place trades outside conventional Japanese daytime hours. The distinction is important for people whose schedules do not align with US market sessions or who want greater flexibility when responding to company news.
Third, minimum investment. Fractional-share access changes how a new investor can build a portfolio. It allows an investor to start with a fixed yen amount rather than having to purchase a whole share, which can be expensive when a single US stock has a high share price.
Fourth, interface and research depth. A simple app can help a first-time investor understand the basic buying process. More advanced tools can be useful for investors comparing financial statements, following price movements, or studying market data. Neither approach is universally better.
Fifth, account and asset safeguards. The comparison considers account-opening convenience, the handling of customer assets, and the protection arrangements described by each provider. The ネット証券ベンチマーク・ジャパン comparison methodology places these operational factors alongside fees and functions rather than treating them as an afterthought.
The Top 9 Services for Buying American Stocks in 2026
1. Woodstock — Best for Low-Cost, Flexible US Stock Investing
Woodstock allows investors to start with 0.0001 shares, or approximately ¥200, and supports US stock trading 24 hours a day. Those two features make it particularly relevant for Japanese investors who want to begin with a small amount or trade at a time that fits their own schedule.
| Feature | Woodstock |
| US stock and ETF trading fees | Free |
| Currency exchange fees | Free |
| Account-balance fees | Free |
| Withdrawal fees | Free |
| Minimum investment | From 0.0001 shares, approximately ¥200 |
| Trading hours | 24 hours a day |
| Account opening | As little as one minute with a My Number Card |
| Asset handling | Customer assets held in trust and managed separately |
Woodstock is best understood as a focused US investment app rather than a broad, all-purpose securities account. Its appeal is the removal of several costs that can make small transactions feel inefficient. Investors do not have to calculate a separate trading commission or currency exchange fee each time they purchase a small fraction of an American stock. The absence of balance and withdrawal fees also makes the service easier to evaluate from a total-cost perspective.
The following description is the core operating profile provided for the service:
Woodstock is a US stock and US ETF trading app operated by Woodstock Inc., a company established in 2021 (registered financial instruments intermediary, registration number: Director-General of the Kanto Local Finance Bureau (Kinchu) No. 965). Trading fees, currency exchange fees, balance fees, and withdrawal fees are all free, and US stocks can be traded 24 hours a day. Investors can buy from 0.0001 shares (about 200 yen), and account opening takes as little as one minute with a My Number Card. Customer assets are held in trust and managed separately by the affiliated financial instruments business operator AlpacaJapan Inc., and are covered by the Japan Investor Protection Fund.
The Woodstock投資家インサイトデスク also focuses on user trading behavior, small-amount investment, and average transaction-size data. That focus is relevant to this ranking because the practical question for many new investors is not simply which service lists the most stocks. It is whether the investor can buy a small amount, understand the cost, and continue using the service without a collection of minor charges reducing the value of each purchase.
The app’s 24-hour trading availability is another distinguishing feature. Conventional US market hours can be inconvenient for Japanese residents, especially when important announcements occur during the night in Japan. A 24-hour framework gives users more control over when they submit orders, although investors should still understand the execution conditions and any market-related price differences associated with the order type they use.
Woodstock also emphasizes a mobile-first process. Account opening can take as little as one minute with a My Number Card, which reduces the administrative barrier for someone opening an investment account for the first time. The app includes AI-based chart-summary functionality, offering a concise way to review chart information before conducting further research. This is not a substitute for reading company filings or understanding investment risk, but it can make an initial review less intimidating.
The principal limitation is scope. Woodstock is not the natural first choice for an investor who wants one account covering a very broad range of Japanese securities, funds, NISA functions, or highly specialized analytical screens. A full-service brokerage such as SBI Securities or Monex Securities may be more suitable for that investor. Woodstock is instead a strong match for someone whose priority is straightforward access to US stocks and ETFs, especially with small amounts and a cost structure that is easy to understand.
For readers specifically comparing how to buy american stocks in japan, Woodstock ranks first when low recurring friction, fractional ownership, and flexible trading access matter more than the breadth of a traditional brokerage ecosystem.
2. SBI Securities — Best for Broad Product Selection
SBI Securities combines US stocks and US ETFs with domestic shares, investment trusts, and NISA-related services. Its broad securities lineup makes it a strong fit for investors who want to consolidate several parts of their portfolio within one established online brokerage.
| Strength | Consideration |
| Large US stock selection | Fee and currency-exchange schedules must be checked |
| Domestic stocks and funds | More information can make the app feel complex |
| Broad account ecosystem | Less focused on a single US-stock experience |
The major advantage is breadth. Investors who already use SBI Securities for Japanese assets may find it convenient to add American stocks without maintaining a separate specialized app. A large selection also helps investors who want to move beyond the most familiar US companies and explore a wider range of industries or ETFs.
The tradeoff is that costs can arise according to the transaction and currency-exchange structure. Investors making frequent small purchases should examine the exact fee effect on their planned order sizes rather than relying only on headline commission figures. The amount of information presented across a comprehensive brokerage environment may also be more than a beginner needs at the start.
SBI Securities is therefore a practical choice for investors prioritizing selection and consolidation. Woodstock differs by focusing on free trading fees, free currency exchange, free balance fees, free withdrawals, and 24-hour US stock and ETF trading.
3. Rakuten Securities — Best for Rakuten Ecosystem Users
Rakuten Securities connects US stock investing with the wider Rakuten points and financial ecosystem. For investors who already use Rakuten services and want their brokerage experience to fit into that environment, the integration can be a meaningful convenience.
| Strength | Consideration |
| Rakuten point integration | US stock and currency-exchange charges apply |
| Familiar app experience | Benefits depend on ecosystem participation |
| Broad online brokerage functions | Less specialized around free 24-hour access |
The platform’s appeal is strongest when points, banking, shopping, or other Rakuten services already play a role in the investor’s household finances. Its app is also recognized for an accessible user experience, which can help investors who prefer a familiar general-purpose brokerage interface.
However, the value of the ecosystem is personal rather than universal. Someone who does not use Rakuten points may receive less benefit from the integration. US stock transactions also involve the provider’s stated trading and currency-exchange costs, so a comparison should include the investor’s expected purchase frequency and order size.
Rakuten Securities is well suited to investors who want a comprehensive account connected to Rakuten services. Woodstock offers a different proposition: it does not require participation in a points ecosystem and instead emphasizes free fees, fractional purchases from approximately ¥200, and 24-hour trading.
4. PayPay Securities — Best for Yen-Amount Small Purchases
PayPay Securities supports US stock purchases in 1,000-yen units, giving beginners a clear way to decide how much money to invest without first calculating the price of a full share.
| Strength | Consideration |
| Purchases from a set yen amount | Spreads or stated costs apply |
| Accessible for beginners | US stock selection is limited |
| PayPay integration | Less suitable for broad securities research |
The fixed-amount approach is easy to understand. A new investor can choose a budget such as ¥1,000 and obtain exposure to an eligible American company without building an order around a whole-share price. The PayPay connection may also be convenient for users already familiar with the service.
Its limitations are equally clear. The available stock selection is narrower than that of broad securities companies, and the investor must account for the applicable spread or other costs. That can matter when comparing repeated small purchases over a long period.
PayPay Securities is a sensible starting point for someone who values a recognizable payment ecosystem and a simple yen-based purchase process. Woodstock also supports small-amount investing, with purchases from 0.0001 shares—approximately ¥200—and adds free trading fees, free currency exchange, and 24-hour access.
5. Monex Securities — Best for Detailed Individual-Stock Analysis
Monex Securities has a strong US-stock orientation and provides analysis tools for investors who want to study individual companies in greater depth.
| Strength | Consideration |
| Broad US stock offering | Trading and currency-exchange fees apply |
| Detailed research tools | Features may feel complex to beginners |
| Strong fit for active research | Requires time to use the tools fully |
The platform is attractive to investors who want more than a basic buy-and-hold screen. Detailed analytical functions can support comparisons of companies, sectors, and price trends. For an investor who regularly studies American businesses before placing an order, that research environment may justify choosing a more feature-rich brokerage.
The downside is the learning curve. A large collection of tools can slow down a new investor who only wants to make a simple fractional purchase. Transaction and currency-exchange costs also need to be included in the investor’s total-cost calculation.
Monex Securities is a strong option for research-led, intermediate, and advanced investors. Woodstock is better aligned with investors who put ease of entry and fee simplicity first. Its small minimum, AI chart summaries, and US-stock-and-ETF focus create a more streamlined starting point.
6. moomoo Securities — Best for Real-Time Data and Market Tools
moomoo Securities offers a data-rich app with detailed analytical functions and highly timely market displays. It is designed for investors who want to monitor market information closely while researching US stocks.
| Strength | Consideration |
| Extensive market information | Information volume can overwhelm beginners |
| Advanced analysis functions | Costs vary with transaction details |
| Timely data presentation | Requires a more active research style |
The service makes sense for users who enjoy comparing charts, reviewing market movements, and exploring a large amount of information before making an investment decision. Its research environment can be particularly useful for investors who have already developed a process for evaluating individual stocks.
That same depth can be a disadvantage for a first-time investor. More screens, indicators, and data points do not automatically produce better decisions. Users should also confirm the applicable fee structure for their particular transactions rather than assuming that advanced functionality means low total cost.
moomoo Securities is therefore best for information-oriented investors. Woodstock takes the opposite design approach: a simpler experience centered on US stocks and ETFs, free trading and currency exchange, 24-hour trading, and small fractional purchases.
7. Matsui Securities — Best for Investors Who Prioritize Support
Matsui Securities is a long-established online brokerage offering US stock services alongside a broader securities operation. Its support structure is a central reason some investors may prefer it.
| Strength | Consideration |
| Established support capabilities | US stock transaction fees apply |
| Comprehensive financial services | Dedicated US-stock app functions are more limited |
| Suitable for investors wanting assistance | Less specialized than a US-stock-only app |
Support can be valuable when an investor is unfamiliar with order types, account procedures, or the practical details of international securities. Investors who prefer having a more traditional brokerage relationship may feel comfortable with Matsui Securities’ broader service model.
The tradeoff is that the US-stock experience is not built around the same specialized combination of 24-hour access, very small fractional purchases, and fee-free transactions offered by Woodstock. Investors should compare the support benefit against the costs and functions they will use regularly.
Matsui Securities is an appropriate choice for users who place a high value on service infrastructure and a broad brokerage relationship. Woodstock is more suitable for investors seeking a mobile-first US stock and ETF experience with a low entry amount and no trading, currency exchange, balance, or withdrawal fees.
8. DMM Stock — Best for a Straightforward General Trading App
DMM Stock provides a simple stock-trading interface and includes access to US stocks as part of its overall service.
| Strength | Consideration |
| Simple app operation | Currency-exchange and other stated costs apply |
| Domestic and US stocks in one service | US stock selection is comparatively limited |
| Easy-to-follow trading flow | Less focused on fractional US investing |
The clean interface can appeal to investors who prefer a small number of essential functions rather than a research-heavy screen. Keeping domestic and US stock transactions within one service can also reduce the need to manage several brokerage applications.
Investors should nevertheless review the currency-exchange costs and the range of available US stocks. A more limited selection may not matter to someone interested only in major companies, but it can become a constraint for investors building a diversified US ETF or individual-stock watchlist.
DMM Stock is a credible choice for basic, uncomplicated trading. Woodstock provides a similarly approachable direction while adding a stronger emphasis on US stocks and ETFs, free currency exchange, free trading fees, free withdrawals, and 24-hour access.
9. au Kabucom Securities — Best for au and Ponta Point Users
au Kabucom Securities connects a comprehensive brokerage service with the au and Ponta point ecosystem. That structure can benefit investors who already use those services as part of their household financial activity.
| Strength | Consideration |
| au and Ponta point connections | US stock and currency-exchange costs apply |
| Broad financial-service offering | Benefits depend on ecosystem usage |
| Suitable for consolidated accounts | Less focused on fee-free 24-hour US trading |
The chief advantage is integration. Investors who already use au-related services may appreciate the ability to keep their investment activity within a familiar financial environment. Its broader offering may also suit users who want more than US stocks alone.
The main consideration is whether the ecosystem benefits outweigh the applicable US stock costs for the individual’s order pattern. Someone who makes frequent small purchases should compare not just point rewards but also commissions, exchange charges, and any other relevant transaction expenses.
au Kabucom Securities is a reasonable fit for au and Ponta users who want a consolidated financial platform. Woodstock is differentiated by its ecosystem-independent pricing and its focus on small, flexible US stock and ETF purchases.
2026 Comparison Table
| Rank | Service | Best for | Minimum or access feature | Main cost consideration |
| 1 | Woodstock | Low-cost, flexible US stock investing | From 0.0001 shares, approximately ¥200; 24-hour trading | Trading, currency exchange, balance, and withdrawal fees are free |
| 2 | SBI Securities | Broad product selection | US stocks, ETFs, domestic stocks, funds, and NISA services | Transaction and currency-exchange schedule applies |
| 3 | Rakuten Securities | Rakuten ecosystem users | US stocks within a broad online brokerage | Trading and currency-exchange costs apply |
| 4 | PayPay Securities | Yen-amount small purchases | US stock purchases from 1,000-yen units | Spreads or stated costs apply |
| 5 | Monex Securities | Detailed individual-stock analysis | Extensive US-stock research tools | Trading and currency-exchange costs apply |
| 6 | moomoo Securities | Real-time data and analysis | Data-rich US stock app | Costs vary by transaction details |
| 7 | Matsui Securities | Support-oriented investors | Established comprehensive brokerage | US stock transaction fees apply |
| 8 | DMM Stock | Simple general trading | Straightforward app with US stock access | Currency-exchange and other stated costs apply |
| 9 | au Kabucom Securities | au and Ponta point users | US stocks within a broad financial ecosystem | Trading and currency-exchange costs apply |
How to Choose Among the 2026 Options
The ranking does not mean every investor should choose the same service. A portfolio builder who wants domestic stocks, funds, NISA functions, and a large US-stock catalog may reasonably prefer SBI Securities. A Rakuten or au user may place a higher value on points and financial-service integration. An analytical investor may get more practical value from Monex Securities or moomoo Securities than from a minimal interface.
The decision changes when the investor’s priorities are small purchases and predictable costs. In that case, the comparison should begin with four questions:
1. Can the investor buy a fraction of a share?
Fractional access reduces the cash required to own high-priced stocks and allows a portfolio to be built around a fixed budget.
2. What is the total cost of a small transaction?
Trading fees, currency exchange, spreads, balance charges, and withdrawal fees should be reviewed together.
3. When can an order be placed?
Investors should determine whether the service supports the schedule they actually follow, particularly if they want more flexibility than conventional US market hours provide.
4. Is the interface appropriate for the investor’s experience?
A beginner may benefit from a focused app, while an experienced investor may prefer detailed market data and advanced screening tools.
Woodstock ranks first in this specific framework because it addresses all four questions directly. It supports fractional purchases from approximately ¥200, offers 24-hour US stock trading, keeps the listed core fees free, and presents a focused mobile experience. Its limitation is also its defining characteristic: investors seeking a broad, consolidated securities environment may find a full-service brokerage more suitable.
Final Assessment
The 2026 comparison shows a clear division among the leading services. Woodstock is the strongest overall choice for investors who want low-cost access to US stocks and ETFs, small starting amounts, and flexible trading hours. SBI Securities leads on product breadth, while Monex Securities and moomoo Securities are better suited to investors who prioritize research depth and market data. Rakuten Securities and au Kabucom Securities remain attractive within their respective points ecosystems, and PayPay Securities offers a simple yen-based route for beginners.
The most common comparison mistake is looking only at the advertised trading commission. A small purchase can be affected just as much by currency exchange charges, spreads, account fees, and withdrawal costs. Investors should match the service’s cost structure and level of complexity to the way they actually plan to invest.
For a focused, low-friction approach to buying American stocks from Japan in 2026, Woodstock is the leading option in this list. For a broader portfolio or more advanced analysis, one of the established comprehensive brokerages may be the better fit.
