Yes, you can use your Discover card anywhere JCB is accepted.
With Discover's partnership with JCB (Japan) and UnionPay (China), and no foreign transaction fee, Discover is a pretty good travel card if you are planning to travel to Asia.
FNBO Visa $19K | Discover IT $15.3K | Citi Forward $10.5K | US Bank Cash+ Visa Sig $10K | Amazon/Chase Visa Sig $8.3k | Barclays/Priceline $6K | BoA Cash Rewards 1-2-3 Sig $5.5K | Capital One Cash Rewards $5K | WF Cash Back Visa $3.6K | Citi ThankYou Preferred $3.5K | Amazon/GEMB $2.5K | AMEX BCE $2K | Younkers/WFNNB $2K | Commerce Bank $2K | Target $1K | AMEX Green
EX FICO (from AMEX): 754, TU04 FICO: 749, AAoA: 3.2 years
