What card can I use to travel to Japan and Korea?

Most stores in Japan support visa and MasterCard, and Japanese joint credit card (JCB card) can also be handled in China. UnionPay cards, WeChat and Alipay can be used in most pharmacies and convenience stores. Many small shops can only pay cash. In short, it is relatively inappropriate to exchange yen cash in advance, and it is not appropriate to go to a hotel to exchange it. If the handling fee of a single credit card is appropriate, you can consider changing the right amount of cash and then swiping the card directly. Anyway, every time I travel to Japan for a week or so, I exchange10-150,000 yen, which is basically used for transportation recharge, eating and buying small souvenirs. Supermarkets, pharmacies and bookstores all use mobile phones or MasterCard credit cards to pay.