The Japanese credit card number represents the customer’s unique identification number. According to relevant public information, Japanese credit card numbers contain 16 digits, which represent the customer’s unique identification number. For example, the first six digits represent the bank’s logo, seven to thirteen represent the year and month of issue, fourteen to ten The five digits represent the card type, and the sixteen digits represent the card issuance serial number. The comma is only used to separate the above numbers and cannot be used for other purposes.