Joko Waluyo, TriJamaluddin2013-05-312013-05-312013-05-31wahyu sari yenihttp://repository.unri.ac.id:80/handle/123456789/3520The formal relations of RI-Japan has been openned on 15th April 1958, a while after the agreement value of the peacement contract and reparations war was changed in Tokyo. The relations of RI-Japan in framework of Indonesian’s expedient to take away the west Irian with violance, and Indonesia got donation from Uni Soviet. Netherland and Indonesian had ended the problem of West Irian to hand ever it to the government of Indonesian on 1 st May 1963. Then, International Crisis recently appeared to contradict the formation of Malay Federation, Presiden Sukarno fluented the campaign ” Ganyang Malaysia”. Before the problem of Malay was finished, followed the coup d’etat which was fluent by Indonesian Communist Party (PKI) on 30th September 1965. This coup d’etat ended with failure. The dualism happened in leadership of President Sukarno and Major General Suharto, as defacto ended after the coming out command letter to take the needed action for saving the revolution, by president Sukarno to Major General Suharto on 11th March 1966. Although at the time, the failure of coup d’etat happened and when the dualism of leadership, Japan declarated to sponsor President Sukarno, but didn’t organize any reactions to the failure of President Sukarno which was getting more real except looking after the good relations. Japan, since got freedom on 28 th April 1952, practise did not have turbulance experience in meaning country. Since Prime Minister, Yoshida Shigeru until Prime Minister Sato Eisaku, Japan’s foreign policy followed the United States’ pattern. Japan’s foreign policy to Southeast Asia, was pressed on effort to get the basic commodity and market for the industry. The relations of RI-Japan, for Japan, in framework of the economy, not the ideology. Based on the theory of ‘ Nefos-Oldefos’, Japan was more closed with Oldefos, but Indonesian was in Nefos, but the relations of Indonesian-Japan was good and friendly. The good relation of Indonesian-Japan was signed by the enough frequency visit of two states official, the Japan’s implementation of reparations war payment to Indonesia, and Japan’s effort in solving the conflict between Indonesian- Malaysia.enwar reparationsideologyfriendlyOther