Japan ? A plot to assassinate then-Prime Minister Shigeru Yoshida was hatched in July 1952 by a group of six people, including former Imperial Japanese Army officers, according to recently declassified U.S. Central Intelligence Agency archives.

Among the group was Takushiro Hattori, a former chief operation planner attached to the army’s General Staff Office, who after the war is believed to have been involved in secret operations conducted by the General Headquarters of the Allied Forces in Japan.

According to a CIA document dated Oct. 31, 1952, the group, whose members were disgruntled with what they considered to be a hostile attitude taken by Yoshida toward nationalists and those purged from public posts, planned to assassinate him and replace him with Ichiro Hatoyama, who was prime minister from 1954 to 1956.