Kaishintō

The party was established on 8 February 1952 as a merger of the National Democratic Party and the Shinsei Club, together with most of the Farmers Cooperative Party's Diet members.^[1] In May Mamoru Shigemitsu was elected party president.^[1] The party started out as a progressive conservative party that advocated for political and social reform along the lines of co-operativism and a "modified capitalism", but it took a nationalist turn and started to advocate for rearmament.^[2]

Having started with 69 seats, the party won 85 in the 1952 general elections. In the 1953 elections it lost nine seats; it also won eight seats in the House of Councillors. In November 1954 it merged with the Liberal Party and a group of Diet members from the Liberal Party to form the Japan Democratic Party.