The State of East Java () was a federal state (negara bagian) formed on the Indonesian island of Java by the Netherlands in 1948. It subsequently became a component of the United States of Indonesia, but merged into the Republic of Indonesia on 9 March 1950. Person of interests Achmad Kusumonegoro, Wali negara Tan Boen Aan Sutedjo Djuwito J.F. Tumbelaka Sujadi See also History of Indonesia Indonesian National Revolution Indonesian regions References Indonesian National Revolution