The first Fish Aggregating Devices that made fishermen enable to catch tunas efficiently with less time and fuel, were developed in 1982 by fishermen in Irabu, Okinawa. Fishery on FADs spread rapidly since the fishermen needed new catch resource that had decreased in coral reefs in early '80s. FADs built and set in the ocean by fishermen drift away in short term, so Okinawa Prefectural Government has introduced FADs with high durability in public works. There are about 200 FADs set by prefecture and fishermen's associations around Okinawa islands. This issue introduces how FADs are managed and used for tuna fishing in Okinawa.