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>In the case that the number of card digits will be increased, it is necessary to discuss within the industry whether the 16-digit cards that already exist shou

>In the case that the number of card digits will be increased, it is necessary to discuss within the industry whether the 16-digit cards that already exist should all be changed into new cards as well, or if the two types can exist alongside each other. This is literally a non issue. Amex cards have 15 digits and a 4 digit CVV I've literally never had any issues with it.

fomine3 6y ago
AMEX isn't major in Japan so possibly some Visa/Master only systems causes a problem.
- sgjohnson 6y ago
  But they definitely operate in Japan. Doesn't matter if they are major or not. And the acceptance was great, when I was in Japan I never had to resort to my backup MAsterCard.