The Leftist Socialist Party of Japan was a Japanese political party that existed between 1948 and 1955. It was an extreme left political party, which adopted Marxist-Leninism.
The left-wing was in chaos between 1948 and 1955, and finally, in early 1955, the Rightist Socialists and the Leftist Socialists reconciled and merged back into the Japan Socialist Party, months before the formation of the Liberal Democrat Party, a merger of the Liberal and Democrat parties. The Leftist Socialists always had the upper hand, and even though the party was dissolved, the old leftists held firm control of the Japan Socialist Party (causing a few rightists to leave the party in 1960 and create the Democratic Socialist Party). A recently formed organisation Young Socialists, which retains a full membership of International Union of Socialist Youth), is said to be inherited from the political tradition of Rightist Socialists.
The JapanSocialistParty (日本社会党) (in Japanese Nihon Shakai-to) was a former Japanese political party with a socialist, left-wing ideology, which functioned between 1945 and 1996.
In 1947, Katayama Tetsu, a Socialist, was elected Prime Minister, and the JSP won a plurality in the Diet of Japan.
Thus, the New Party Sakigake and JSP left the coalition, while the Communists and Komeito remained in the coalition.
Japan is a unitary state, in which the authority of the central government is superior to that of the country’s prefectural governments.
Japan’s constitution has not been amended since 1947, although from time to time proposals are introduced to revise some of its provisions, particularly those on demilitarization and the status of the emperor.
Parties were thus forced to organize intensively at the local level during elections in order to encourage voters to distribute their votes evenly among the party’s candidates.