Originally Posted by
photaco
It sounds like you have not personally tried using a Discover card in Japan and/or China. I assure you even if the cashier tries it, it will not work at all merchants. Discover's transition to EMV cards makes it worse, as it appears to be a 100% failure rate in China right now.
Also, I've never seen anyone claim that you can use JCB cards at UnionPay merchants. Can anyone verify this? Just because you can use JCB cards at Discover merchants and UnionPay cards at Discover merchants, does not mean you can use a JCB-only card at a UnionPay merchant.
I was getting JCB & UnionPay confused

. You can request a Discover card with no EMV chip if you like. Acceptance isn't 100% with Discover, but when the cashier actually tries it - it's been pretty good in my limited experience.
Are there any US issued Union Pay credit cards?