The National Democratic Party was a

political party A political party is an organization that coordinates candidates to compete in a particular area's elections. It is common for the members of a party to hold similar ideas about politics, and parties may promote specific political ideology, ...

Japan Japan is an island country in East Asia. Located in the Pacific Ocean off the northeast coast of the Asia, Asian mainland, it is bordered on the west by the Sea of Japan and extends from the Sea of Okhotsk in the north to the East China Sea ...

, led by Miyazaki Ryusuke. Miyazaki broke away from the

Social Democratic Party The name Social Democratic Party or Social Democrats has been used by many political parties in various countries around the world. Such parties are most commonly aligned to social democracy as their political ideology. Active parties Form ...

in 1929, after having drifted towards conservative positions. The party contested the 1930 elections, with Miyzaki unsuccessfully running in the Fourth district. After the 1930 election the party merged with the Japan Masses Party, the Tokyo Proletarian Party and ten local parties, forming the National Masses Party.Beckmann, George M., and Genji Okubo.
The Japanese Communist Party 1922-1945
'. Stanford, Calif: Stanford University Press, 1969. p. 221

References

1929 establishments in Japan 1930 disestablishments in Japan Agrarian socialist parties Defunct agrarian political parties Defunct nationalist parties Defunct political parties in Japan Defunct socialist parties in Asia Japanese nationalist parties Political parties disestablished in 1930 Political parties established in 1929 Socialist parties in Japan Political parties in the Empire of Japan {{Japan-party-stub