The Okinotori "Islands" (沖ノ鳥島 Okinotori-shima) are considered a Japanese uninhabited atoll with a total area of 8,482 m2 (2.096 acres). Its dry land area, however, is mostly made up by three concrete encasings; it furthermore has a 100 by 50 m (330 by 160 ft) platform in its lagoon housing a research station. China, South Korea and Taiwan dispute the Japanese exclusive economic zone (EEZ) around the atoll, stating that the atoll is not an island and therefore cannot have an EEZ.