Source Oki-Ngo (NPO Okinawa NGO Center, 3-23-52 Ginowan, Ginowan City, Okinawa, Japan 901-2211). Apparently prepared for the 5th Worldwide Uchinanchu Festival in October 2011, “Let’s Study! The Worldwide Uchinanchu Project.” I’m not sure about the accuracy of the figures, how they were calculated, by whom, and when. Still, it provides an interesting starting point for further research and discussion. Click image to enlarge.