Hello 宏幸, 

As I previously asked, please send us tickets in English since we need to use Google translate for translating Japanese and are afraid that something will be misunderstood and we won't be able to help. Thank you for understanding. 

This is what I got for your ticket in English from Google:

I'm not good at English, so let me ask you questions in Japanese.
When entering the card number on the reservation application screen
card number
expiration date
Security code
Postal code
, But I'm not sure why it says "zip code" here. And you can only enter up to four digits instead of five.
I don't think it has anything to do with credit card information.

These information are required by Stripe, not by us. So, depending on the country where you are from, the zip/postal code is requested. Please check which country is shown for the phone field in the booking process.

Hello 宏幸,

Thank you for the screenshots. 

Unfortunately, this is something that Stripe controls, we don't have any impact on it and can't change it. These fields are set by them and they need it for the payment process, we can't change them.

You can maybe contact their support to ask them about this since you have account there and use it for payments. 

You are welcome. Hopefully they will help out with the issue that you have.

If you have any other questions or concerns feel free to open a new ticket and we will gladly help,