"error code2101 You have entered an invalid payment method. Please use one of the following Japan-issued credit cards: Visa, Mastercard, JCB, American Express, and Diners Club. (XX)" is shown. Created March 09, 2020 04:35 Updated March 09, 2020 09:33 You will see this error message when a non-Japanese credit card is selected. Please sign up with the credit cards issued in Japan. Visa/Mastercard/JCB/American Express/Diners Club. Related articles "error code 2103 We are unable to successfully complete the transaction with your credit card. Please try another card. (XX)" is shown. What type of payment methods can I use? "Payment is being processed" is shown. I cannot cancel or change payment method.