Yonaguni is a town located entirely on Yonaguni Island in Yaeyama District, Okinawa Prefecture, Japan. It is the westernmost municipality in Japan, and is known for billfish fishing and as a diving spot. In 1987, divers discovered the Yonaguni Monument, a rock formation that some believe may be man-made.
It is also home to two Ryūkyūan writing systems, pictographic "kaida-di" and the symbols used to indicate family names, "dāhan".
Wikipedia https://en.wikipedia.org/wiki/Yonaguni,_Okinawa
Coordinates 24°27'20.376" N 122°59'33.367" E
