Are you talking about paying off the credit card in Japanese yen? As long as your credit card has the automatic foreign exchange purchase function, you only need to repay in RMB, and the bank will automatically buy Japanese yen for you on your final repayment date. I use the CITIC Bank Platinum Card to repay in U.S. dollars. This is how to pay back

I am a bank financial manager, with a minimum monthly income of 2, I hope you will adopt it