have there ever been any ALTs on Yonaguni Island?

Yonaguni Island is the westernmost inhabited island of Japan, located about 127 km from Ishigaki Island and 509 km southwest of Okinawa Island, making it the country's furthest point to the west.

I'm curious, have there ever been any ALTs on that island? Or any other island that's pretty far from the mainland/large cities like Naha?