If you go back to the days of Commodore Perry and his gang, they called the place Loo-Choo, Lu-Tchu, Lewchew and probably a few other names they heard while they were mapping the oceans, sailing their boats, drinking rum and learning how to mispronouce everyone's name they met.
On this map, I borrowed from Wikipedia, you can see the chain of islands stretching from Taiwan to the Japanese island of Kyushu; the big island that has Fukuoka written on it. And, right near the second "YU" of RYUKYU on the map is the island of OKINAWA. That's the island I live on.
So, there you have it. I live in the Ryukyu Islands. Now I have to decide whether to have another beer or a coffee !