In Japan, in big cities, Tokyo and Osaka, basically many large department stores can use UnionPay to swipe their cards. It's just that you have to tell them that you want UnionPay. Very convenient. I'm sure I won't take other channels to brush UnionPay, which saves the money exchange fee. Generally, if you go to see it, the more upscale the place, the more open UnionPay will be.

In China, I know that both China Merchants Bank and Bank of China have JCB cards, both of which are dual-currency, but if you don't go there often, the application is of little significance.