I don't really see how it is arrogant to assume that when every place I have called/emailed for quotes on transportation, entrance fees, tours, etc. have given the quotes in US dollars. If US dollars weren't expected or anticipated, then I would think the quotes would be in JA dollars. When I travelled to China, all the quotes, transportation, etc were quoted in Yuan. Therefore, I expected to pay in Yuan. Your answer was a bit jerky, just so you know.
I was just wondering what, if any, need I would have for JA dollars. And I don't consider getting a not so good exchange for US dollars such a big deal, if it the people I am paying in US dollars makes out a little bit more, I'm cool with that. I just wanted to make sure I wasn't going to absolutely need it to get around, etc.