Taiseikai () was a political party in Japan. It was active from 1890 to 1891.

History Following the July 1890 elections the Taiseikai was established by a group of 79 newly elected and pro-government National Diet members who were largely former civil servants.Haruhiro Fukui (1985) Political parties of Asia and the Pacific, Greenwood Press, pp627–628 The second-largest party after the Rikken Jiyūtō, it was a largely pragmatic group rather than adhering to certain principles.

The party split in November 1891 over its support for the government, with a group breaking away to form the Tomoe Club, and it ceased to exist by the time of the February 1892 elections.

Election results Election Leader Seats Status 1890 Shigeyuki Masuda

References