you make sure you have enough money in two sets of currency in your pocket at all times.... We go out, and we automatically ask, do we have enough Yen/Dollars? Never know what you are going to be up against. Even on base, certain places take Yen, others Dollars. When we pay our car fees, for instance, we pay on base, but have to make sure we have Yen. Go figure. It is a strange experience.
And you know what is annoying? Yennies. the Japanese version of Pennies. They are light, almost like they are monopoly money and made of plastic. There is absolutely no reason for them, except to take up space. My hubby uses him in his gaming night as extra pieces when he runs out.