The was a major Japanese political party that existed from 1945 to 1996. Japan Socialist Party may also refer to: Current political parties , a political party established in 1996 Historical political parties , a political party that existed from 1948 to 1955 after a split in the Japan Socialist Party , a political party that existed from 1948 to 1955 after a split in the Japan Socialist Party Democratic Socialist Party (Japan), , a political party that existed from 1960 to 1994 , a political party that existed from 1906 to 1907 , a political party that existed from 1926 to 1928 a political party that existed from 1926 to 1928 , a political party that existed from 1932 to 1940 , a political party that existed for nine months in 1937 See also Social Democratic Party (Japan) (disambiguation)