Yonaguni:
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. Recently, a megalith known as the Yonaguni Monument was discovered on the seafloor off the southern edge of the island and has been in the spotlight as possible man-made, underwater ruins. It is also home to two Ryūkyūan writing systems, pictographic "kaida-di" (also used on Ishigaki and Taketomi islands where it is called "kaida-ji") and the symbols used to indicate family names, "dāhan" (also used on Ishigaki Island where they are called "yāban").
