Glossary entry
DCC
DCC is short for dynamic currency conversion, the offer to pay in your home currency instead of the local one. When a terminal or ATM in Japan asks which currency to pay in, choosing the local currency, yen, usually avoids it and lets your card network and issuer handle the conversion under the terms you agreed to. A quick check is to compare the dollar total on the screen with the yen price converted at the reference rate, plus your card's own fee if any. See also: dynamic currency conversion, cash advance, and the guide Avoiding Currency Conversion Traps.
A short definition for orientation. The guides and the institutions' own documents are the places for the details.