Ecommerce site payments refer to the system that allows customers to pay for products or services purchased on the web using methods such as credit card payments, quick-response (QR) code payments, convenience store (Konbini) payments, and bank transfers.

Some business owners might implement a payment system on their ecommerce site to sell products and services online.

According to the Ministry of Economy, Trade and Industry’s 2024 Market Survey on Electronic Commerce, Japan’s business-to-consumer (B2C) ecommerce market reached ¥26.1 trillion in 2024, up 5.1% from ¥24.8 trillion the previous year. In addition, cashless payments in the country reached 58% in 2025; as the ecommerce market expands and cashless transactions grow, it is becoming increasingly valuable for ecommerce businesses to build an online payment environment that is straightforward for customers to use.

This article explains how to integrate payments into a Japanese ecommerce site, the major payment methods, key points to consider when selecting a payment agent, and the steps involved.

Key takeaways

• There are two methods for integrating payments into Japanese ecommerce sites: signing individual contracts directly with each provider, or adding multiple options at once through a payment processing service or agent.
  
• Choosing the payment methods—including credit card payments, quick-response (QR) code payments, convenience store payments, and bank transfers—that are well suited to your target customers and sales options is important.
  
• When selecting a payment processing service, it is necessary to compare factors such as integration with your ecommerce cart system, as well as the supported payment methods, fees, and security, while also taking into account operations after implementation.
  

Integrating payments on an ecommerce site

There are two main ways to accept payments on an ecommerce site: signing individual contracts with each payment provider, or using a processing service or agent to integrate multiple payment methods at once.

The best choice depends on several factors, including which options you want to offer, your ecommerce site’s scale, your technical infrastructure, and operating costs.

Direct contract with each payment service provider (PSP)

This method involves signing contracts directly with the companies that offer the payment services you want to use, such as credit card companies and QR code providers (PayPay and Rakuten Pay, for instance). Direct contracts work well when you plan to offer a limited range of options or when your company has the infrastructure to develop and operate its own payment system.

Single contract with a payment processing company

The other method is contracting with a payment processing company or payment agent. A single provider lets you implement and manage multiple options, including credit cards, digital wallets, QR code payments, convenience store transactions, and bank transfers, all in one place.

Payment methods commonly used on ecommerce sites

Ecommerce sites support a variety of payment options.

The Ministry of Internal Affairs and Communications’ 2025 Communications Usage Trends Survey (Household Edition) found that credit card payments are the most common method for purchasing goods online in Japan, with a 79.7% share.

Beyond credit cards, the table below introduces the other main ways to pay on ecommerce sites, along with their advantages and challenges:

The best payment methods depend on your target customer base, your product price range, and how you sell them. You don’t need to offer them all. Prioritize the options that best suit your business.

How to add a payment page to an ecommerce site

The main approaches for adding a payment page to an ecommerce site are shown below:

Use the standard/integrated functions of the ecommerce cart

Ecommerce cart and web-building platforms often include built-in checkout functionality, and in some cases you can configure your preferred payment service directly from the administration panel.

If you’re already using this type of shopping cart, first confirm which payment providers and processors it supports.

Use the payment page provided by the PSP

Another option is to use the checkout page your PSP creates. When a customer clicks the purchase button on your ecommerce site, they are redirected there to complete the transaction. One big benefit is that, because the provider handles payment processing, you don’t need to develop these capabilities in-house from scratch.

Use an API to integrate it into your site

This method involves using the application programming interface (more commonly known as an API) from a PSP to integrate checkout functionality into your company’s ecommerce site. This allows for a flexible purchase flow and user interface design, but implementation requires development resources.

In these setups, a payment gateway securely processes transaction information.

Points to note when choosing a payment agent

When adding a payment system on your ecommerce site, compare transaction fees, compatibility with your cart platform, available payment methods, and security features.

Ease of integration with your cart system

Confirm whether your ecommerce cart or website-building platform supports the payment service you want to add.

Also look for standard integration features, plugins, and development tools such as APIs and software development kits (SDKs) are provided.

Range of supported payment methods

Check whether the payment methods your customers want to use are supported. If the service accepts a broad range of options, including credit cards, digital wallets, QR code transactions, convenience store payments, and bank transfers, you can easily add more later as customer needs change and the business grows.

Stripe Payments makes it effortless to implement several ways to pay at once, including credit cards, Apple Pay, Google Pay, PayPay, convenience store payments, and bank transfers.

Total cost of all expenses

When comparing payment service fees, consider the total cost, including transaction, setup, monthly, and transfer fees, plus refund and chargeback expenses.

Charges can also vary by payment method, and pricing plans might differ based on transaction volume or contract terms.

Reliability of the security system

An ecommerce site handles customers’ names and addresses alongside sensitive transaction details. When implementing card payments, verify the payment service’s security features, such as PCI DSS compliance, nonretention of card information, fraud prevention measures, and user identity authentication.

Keep in mind that you can’t leave security measures entirely to the provider. The business operating the ecommerce site must continue to manage access to the administration panel and take steps to address system vulnerabilities.

Steps for integrating payments into an ecommerce site

The general flow of integrating payments into an ecommerce site is shown below:

Prepare the required information for the sales pages

When applying to a payment service, you might be asked to review your website’s content. Make sure all purchase-related information, including product and service details and prices, is clearly posted there.

Also confirm all information required for online sales, such as your business name, location, contact information, and return and cancellation policies. You must also include the disclosures required under Japan’s Act on Specified Commercial Transactions (ASCT).

Submit the application and required documents

Choose your preferred provider and submit the merchant application. When applying, you will generally need to provide details including the business name, a representative’s name, bank account info, and descriptions of the products or services you sell.

Required documents and details vary by payment service and business model, so check in advance to ensure everything is complete.

Complete the screening process

Merchant screening will be conducted based on the information you have submitted. The review process and time required vary depending on the provider, the payment method, and the nature of your business.

You might be asked to provide further details or documentation. Work backward from the date you want to start accepting payments to ensure you have plenty of time to prepare.

Link your ecommerce site with the payment service

Once your application is approved, you’ll need to integrate the service with your ecommerce site.

If your ecommerce cart includes a built-in payment feature, configure it through the administration panel. If you built your own ecommerce site, you can add payment functionality using APIs or SDKs. When using a provider-hosted checkout page, place a purchase button or a payment link on your site to direct customers there.

Conduct test payments

Before accepting payments in the production environment, run test transactions. Verify that the transaction is processed successfully, the order details and amount display correctly, and the post-purchase screen and email appear properly.

Also test scenarios beyond normal purchases, including refunds or failed payments, to ensure everything works properly.

Start accepting payments in the live production environment

After confirming no issues during testing, you can move to the live production environment and start processing transactions. Following launch, regularly monitor metrics such as the payment success rate, refunds, and chargebacks.

How Stripe can help

Stripe offers several different services that can be used for payments on ecommerce sites in Japan.

Stripe Payments supports a variety of payment methods, while Stripe Checkout lets businesses use pre-built payment pages and Stripe Payment Links enables the creation and sharing of payment links.

How Stripe Payments can help

Stripe Payments provides a unified, global payments solution that helps any business—from scaling startups to global enterprises—accept payments online, in person, and around the world.

Stripe Payments can help you:

• Optimize your checkout experience: Create a frictionless customer experience and save engineering time with prebuilt payment UIs, access to 125+ payment methods, and Link, Stripe’s consumer network.
  
• Expand to new markets faster: Reach customers worldwide and reduce the complexity and cost of multicurrency management with cross-border payment options, available in 195 countries across 135+ currencies.
  
• Unify payments in person and online: Build a unified commerce experience across online and in-person channels to personalize interactions, reward loyalty, and grow revenue.
  
• Improve payments performance: Increase revenue with a range of customizable, easy-to-configure payment tools, including no-code fraud protection and advanced capabilities to improve authorization rates.
  
• Move faster with a flexible, reliable platform for growth: Build on a platform designed to scale with you, with 99.999% historical uptime and industry-leading reliability.
  

Learn more about how Stripe Payments can power your online and in-person payments, or get started today.

How Stripe Checkout can help

Stripe Checkout is a fully customizable prebuilt payment form that makes it easy for you to accept payments on your website or application.

Checkout can help you:

• Increase conversion: Checkout’s mobile-optimized design and one-click checkout flow make it simple for customers to input and reuse their payment information.

• Reduce development time: Embed Checkout directly into your site, or direct customers to a Stripe-hosted page, with just a few lines of code.

• Improve security: Checkout handles sensitive card data, simplifying PCI compliance.

• Expand globally: Localize pricing in 100+ currencies with Adaptive Pricing, which supports 30+ languages and dynamically displays the payment methods most likely to improve conversion.

• Use advanced features: Integrate Checkout with other Stripe products, such as Billing for subscriptions, Radar for fraud prevention, and more.

• Maintain control: Fully customize the checkout experience, including saving payment methods and setting up post-purchase actions.

Learn more about how Checkout can optimize your payment flow, or get started today.

How Stripe Payment Links can help

Stripe Payment Links is a no-code solution that allows you to quickly create and share secure payment pages online.

Payment Links can help you:

• Get paid faster: Share custom payment links with customers and accept one-time or recurring payments instantly, without invoicing or complex integrations.

• Improve conversion: Boost payment conversion rates with a mobile-optimized design and streamlined checkout experience.

• Save time: Easily create, customize, and share payment pages through the Stripe Dashboard—with minimal coding.

• Expand globally: Accept payments from customers worldwide, with Adaptive Pricing localizing prices for 135+ currencies and offering local payment methods that are ready to use.

• Access other Stripe products: Integrate Payment Links with other Stripe products—such as Stripe Billing, Stripe Radar, and Stripe Tax—to add more payment capabilities.

• Maintain control: Customize the look and feel of your payment pages to match your brand, and track all your payment activities in one place.

Learn more about how Payment Links makes it easy to accept online payments, or get started today.

FAQs about ecommerce site payments