I would like to generate an Apple token with JCB card, but there is none available in https://developer.apple.com/apple-pay/sandbox-testing/ .
What's the process to issue a sandbox JCB card?
JCB Sandbox Cards
It looks like the only card types available for Sandbox testing are MasterCard, Visa, Discover, and American Express. You will need to test your JCB card with live transactions on a active Apple Pay account. Typically this would be done with a very small payment on a card and account that is setup for testing purposes, but is still live at the same time.
Matt Eaton
DTS Engineering, CoreOS
meaton3@apple.com