The CIRO was created by the Allied Forces through the formation of the Prime Ministers's Research Office (�����������, Naikakusōri Daijin Kanbō Chōsa-Shitsu) in April 1952 with Jun Murai as the first director in an attempt to replicate its structure after the CIA. But due to widespread opposition, this plan was discarded. The RO was placed under the jurisdiction of the Prime Minister's office in 1957 and was known as the Cabinet Research Office (�����, Naikaku Chōsa-Shitsu). The CRO was later renamed the CIRO in 1986.