Reclamation work is under way off the Henoko district of Nago, Okinawa Prefecture, to build a new facility to take over the functions of the U.S. Marine Corps Air Station Futenma in Ginowan, also in the prefecture. (Asahi Shimbun file photo) A long-running saga over costly land reclamation work for a new U.S. base in Okinawa Prefecture took another twist after a prominent U.S. think tank researcher said the project is “unlikely” to ever to be completed as planned. The project to relocate the U.S. Marine Corps Air Station Futenma in Ginowan to the Henoko district of Nago, both in Okinawa Prefecture, has been plagued by repeated delays and alienated residents of the southernmost prefecture who vociferously complain they shoulder an unfair burden in hosting 70 percent of all U.S. military facilities in Japan.