&YOUKAEN Smartphone Payment (QR Code): How to Use and FAQs
On this page, we will explain in detail how to use QR code payments (PayPay and Merpay).
■ What is smartphone payment (QR code)?
QR code payment is a cashless payment method that allows you to pay using a dedicated app on your smartphone.
If you use apps such as PayPay or Merpay, simply select the corresponding payment method when placing an order, and the app will automatically launch. You can then easily complete the payment by following the instructions on the screen.
Since there is no need to enter credit card information, you can use it smoothly and securely.
■ How to shop with smartphone payment (QR code)
・If you are using a smartphone
The process for using QR code payments (PayPay and Merpay) is as follows:
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On the cart confirmation screen, select [Agree to terms of use] and press [Proceed to payment].

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Enter the necessary information and press [Proceed to shipping method selection].
*Please note that if you select [Easy Payment (Shop Pay / PayPal / Apple Pay / Google Pay)] at this time, you will not be able to use QR code payment. -
Confirm that the shipping method is correct and press [Proceed to payment].

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Select Smartphone payment (QR code) in the [Payment] section.

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Press the button for the payment service you wish to use.

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After transitioning to the payment app, press [Pay] within the app to complete the payment.
・If you are using a PC
- Steps 1-5 can be performed in the same way as on a smartphone.
- After transitioning to the QR code payment dedicated page, open the app you selected on your smartphone, scan the QR code, and complete the payment.
■ Cancellations due to customer convenience
For cancellations or changes to orders due to customer convenience after the order has been confirmed,
we will refund the amount minus 2% of the product price as a cancellation administrative fee.
*In the case of our fault (such as shortages, defective products, or incorrect deliveries), the full amount, including fees, will be refunded.
■ Frequently Asked Questions about Smartphone Payments (QR Code)
Q1. Which QR code payment methods are available?
A. Our store supports the following QR code payment methods:
・PayPay
・Merpay
Q2. Can I use it even if I don't have a credit card?
A. Yes, you can.
Some apps allow you to pay with a bank account or prepaid balance, which is convenient for those who don't have a credit card.
Q3. Do I need an additional app?
A. If the payment service app you plan to use (e.g., PayPay) is already installed on your smartphone, you can use it as is.
Q4. What should I do if the payment does not complete successfully?
A. Please check if your communication status is stable and if the app is the latest version, then try again.
If the problem persists, please contact our store. We will check your order status.
Q5. Can I pay with something other than a smartphone (PC/tablet)?
A. You can place an order from a PC or tablet, but payment requires operation on a smartphone app.
Please scan the QR code displayed when ordering with your smartphone and pay via the app.
Nov 14, 2025