Okinawa is basically a Hawaii that speaks Japanese. It is a beautiful island and has a lot of japanese influence. Regardless, American tavelers should take note. Okinawa was the site of a seriously horrible battle between the Americans And Japanese in World War 2. The battle was a long one and there is a lot of documentation that you can find on it. Its a huge historical impact that I think is not well known and needs to be, it was as bad, or gets really close to, Iwo-Jima. Anyway, back to today, Like i said before, its Hawaii in a different culture. All you really need to know is common sense, being polite, try something new, and relax and enjoy yourself. And try not to underestimate the currency exchange rate, if its confusing, get a calculator and try and adapt to the use of whacky numbers. Other than that you should be fine.