The Social Democratic Party (社会民主党, Shakai Minshu-tō) is a currently active Japanese political party established in 1996.

Social Democratic Party may also refer to the following parties in Japan:

• Japan Socialist Party (日本社会党, Nihon Shakai-tō), also referred to as the 'Social Democratic Party of Japan', a major Japanese political party that existed from 1945 to 1996
• Social Democratic Party (Japan, 1926) (社会民衆党, Shakai Minshū-tō), a political party that existed from 1926 to 1932
• Social Democratic Party (Japan, 1901) (社会民主党, Shakai Minshu-tō), a political party that existed briefly in 1901

• Japan Socialist Party (disambiguation), a disambiguation page for Japanese socialist parties
• List of social democratic parties

This disambiguation page lists Japan articles associated with the title Social Democratic Party (Japan).
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