Generally speaking, the international cards used in Japan are divided into four types: Visa, Master, JCB and UnionPay.
The current credit card mechanism is very sound, and national boundaries have no influence on the use of credit cards. If you want to use a credit card in Japan, it is recommended to use JCB or UnionPay card. JCB is a Japanese yen card, which can be settled directly in Japanese yen, avoiding the exchange rate loss of settlement in US dollars. Repayment can be made in Japanese yen or by purchasing foreign exchange in RMB. UnionPay card is directly settled in RMB, that is, it is directly settled into RMB deduction according to the exchange rate announced by UnionPay on the day of consumption, and repayment is directly made in RMB. UnionPay in Japan is not very popular, especially in Hokkaido and other regions. It is recommended to apply for dual-currency credit cards that both JCB and UnionPay have. You can choose to settle through JCB or UnionPay according to your needs, but you should inform the merchants in advance.