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Title: Kenseikai  
Author: World Heritage Encyclopedia
Language: English
Subject: Wakatsuki Reijirō, List of Prime Ministers of Japan, Political parties of the Empire of Japan, Rikken Dōshikai, Japanese general election, 1924
Publisher: World Heritage Encyclopedia


Leader Katō Takaaki
Wakatsuki Reijirō
Founded October 10, 1916 (1916-10-10)
Dissolved June 27, 1927 (1927-06-27)
Succeeded by Rikken Minseitō
Headquarters Tokyo
Politics of Japan
Political parties
Wakatsuki Reijirō at a Kenseikai meeting

The Kenseikai (Constitutional Party) (憲政会 Keiseikai) was a short-lived political party in the pre-war Empire of Japan.


The Kenseikai was founded on 10 October 1916, as a merger of the Rikken Doshikai (led by Katō Takaaki), Chuseikai (led by Ozaki Yukio) and the Koyu Kurabu (a minor opposition group). Led by Katō Takaaki, the new party was united by its opposition to the policies of the ruling Rikken Seiyukai under Prime Minister Ōkuma Shigenobu. The party was supported financially by the Mitsubishi zaibatsu, due to family ties with Katō Takaaki. Party leaders included Hamaguchi Osachi and Adachi Kenzō. The merger gave the Kenseikai a total of 198 seats in the Lower House of the Diet of Japan, thus forming a majority, and raised the expectation that Katō Takaaki would become the next Prime Minister.

However, the position of Prime Minister was a direct appointment from the Emperor per advice provided by the genrō, and in this case, the genrō unexpectedly nominated General Terauchi Masatake instead. In protest, the Kenseikai initiated a no confidence motion, which subsequently dissolved the Diet and led to the political isolation of the Kenseikai for almost a decade. During its period in the opposition, the Kenseikai strongly opposed the Siberian Intervention and pushed for greater rights for labor unions.[1]

In the 1924 General Electrion, the Kenseikai secured 150 seats, making it the largest single party in the Lower House, but without a majority. Katō agreed to form a coalition government with the Rikken Seiyukai (led by Takahashi Korekiyo), which had 100 seats, and the Kakushin Kurabu (led by Inukai Tsuyoshi), which had 30 seats. This three-party coalition (Goken Sampa Naikaku) was the first ruling coalition government in Japanese history, and used its majority to focus on domestic political reform and a moderate foreign policy.

It pushed strongly for rule under the Meiji Constitution, without influence or control by the genrō. It also favored universal male suffrage (which led to the General Election Law) and much needed reforms in labor laws and in the economic situation for farmers. However, despite its liberal image, the coalition passed the Peace Preservation Law in 1925.

Following Katō's death, the party was led by Wakatsuki Reijirō, but his cabinet was unable to weather the Shōwa financial crisis of 1927. The Kenseikai merged with the Seiyū Hontō in June 1927 to form the Rikken Minseitō.


  • Garon, Sheldon (2001). The State and Labor in Modern Japan. Palgrave Macmillan.  
  • Gordon, Andrew (2008). A Modern History of Japan: From Tokugawa Times to the Present. Oxford University Press.  
  • Jansen, Marius B. (2000). The Making of Modern Japan. Cambridge: Harvard University Press. ISBN 9780674003347; OCLC 44090600
  • Mason, RHP. A History of Japan. Tutte Publishing (1987). ISBN 0-8048-2097-X *Sims, Richard (1990). Japanese Political History Since the Meiji Renovation 1868-2000. University of California Press.  


  1. ^ Garon. The State and Labor in Modern Japan Page 63-65
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