Originally Posted by
NYCFlyer10001
JCB uses their own exchange rate, see e.g.
http://www.jcb.jp/rate/usd11172014.html
(Change the date in the URL to the transaction date.)
You can see that as of 11-17 ('recently') they were using $1 = 116 JPY (the 'mid' rate). Discover shouldn't manipulate that rate any further, so you may need to contact their CS for details. The Discover network doesn't support DCC, and if you're being charged in JPY at all, DCC/currency conversion wasn't done.
Working out a similar problem here
http://www.hongkongcard.com/forum/fo...p?id=12138&p=5 #42
I don't think using the mid rate is right. As a USD cardholder in Japan you should be using the buy rate (118.18
http://www.jcb.jp/rate/usd11212014.html)
That still doesn't justify the rate...tho are they keeping 10.48% as a reserve against exchange rate fluctuation between transaction and posting?
Please let us know posting rate.
Also, is there any foreign transaction or conversion fee on your card (none right?)?