The first step: Enter the Amazon official website homepage
The second step: Click on the クレジットカードinformation をedit? Delete する (edit or delete credit card information)
Step 3: Follow the picture prompts and click Delete
Step 4: Confirm again and it’s OK
Finally: In order to determine whether the credit card information has been successfully deleted, you can repeat the above steps. I found that the credit card information is no longer available. If this happens, it means success