Credit Card in Japan
2月
4日
"Do you want to pay it at once?"
「いっかつでよろしいですか?」
What is that mean? Why do they ask that question?
Well, unlike credit cards in the US, Japanese credit cards require you to pay 100% every month except you ask your merchant to charge it over period of months. いっかつ means, you pay full amount at the end of the month.
Since you are from other countries, this does not apply to any of you. But this is something you should know about it.