Different issuers: jcb is a credit card product issued by Japanese banks; Visa credit card is a credit card product issued by Visa International.
Different settlement tools: jcb is generally more convenient to use jcb card in Japan; Visa is used all over the world, and it can be used in places where there is no UnionPay.
The scope of consumption is different: jcb cards are mainly settled in Japanese yen, while visa cards are settled in US dollars.
Introduction to jcb and visa
Jcb and visa are international credit card swiping organizations. Jcb stands for Japan Credit Bureau, while visa is operated and managed by visa International Organization in San Francisco, California, USA.