The 9,852 acres of land on the island of Okinawa, part of a territory officially referred to as the Northern Training Area, is in a large US military base complex on the Pacific island more than 960 miles (1,550 kilometers) southwest of Tokyo.
The US had turned most of Okinawa over to Japan in 1972 after controlling it from the end of World War II in 1945.
This is the largest return of US-occupied land since then.