Although I have never encountered this problem, I can give you some suggestions.

1. This mainly depends on whether the Japanese website supports bank card payment in other countries.

2. Thinking about it from another angle, do you think our Chinese Amazon website supports payment by foreign banks’ bank cards? If we do not support it, foreigners must use bank cards from several major banks recognized by China and install relevant online banking to make purchases.

If an online bank supported by Japan happens to have branches in China (I passed by Beijing’s Jianguomen Overpass and saw a Japanese Mitsubishi Bank. Maybe Japan’s Mitsubishi Bank is not the only one with branches in China), you have to Go to the branch of the Bank of Japan in China (log in to the official website and search the cities where branches are located in China) to register for online banking. Just like foreigners registering for Bank of China online banking and shopping on Amazon China).

Tip, is Amazon Japan responsible for cross-border mailing?