We are currently experiencing a system glitch that is preventing our customers from using their accumulated points when they select Amazon Pay as their payment method. We are currently investigating the cause of the problem, but it is expected to take some time before the system is restored. We apologize for any inconvenience this may cause.
Please note that the following procedure will allow you to use your accumulated points, but the operation will be more complicated and time consuming than normal.
Please note that the operation is more complicated and time-consuming than normal. After that, follow the instructions in theUser's Guide until you reach "How to Order > 6. 
(2) Copy all the codes starting with "DOKOPOI" listed under "Gift Card or Coupon Code" on the payment page. 
Select "Amazon Pay" and follow the instructions to complete your order.
When you come back to the payment page, paste the number you copied into the "Gift Card or Coupon Code" field and click the "→(Apply)" button. 
Check if the discount for points is reflected in the total amount at the top of the page. If there are no errors, press the "Complete Order" button at the bottom. Your order is completed.