Japan Socialist Party (1906)

The Japan Socialist Party (, Nippon/Nihon shakai-tō) was the first legal socialist party in the Empire of Japan. One year after its foundation on February 24, 1906, the party was banned by the Japanese government on February 22, 1907.

The party was founded from the merger of the former "Japan Socialist Party" led by Sakai Toshihiko and the "Nihon Heimin-tō" (日本平民党, which literally means "Common People's Party of Japan") led by Kōnirō Nishikawa, where it was agreed upon to name the new party as "Japan Socialist Party".

Some Chinese Marxists, like Meijiu Jing, were also influenced by this party.