Timeline
- 1874: Aikoku Kōtō (Public Society of Patriots) founded
- 1881: Aikoku Kōtō and Aikokusha are continued by the Jiyutō (Liberal Party of Japan)
- 1882: Rikken Kaishintō (Constitutional Progressive Party) founded by Okuma Shigenobu
- 1882: Rikken Teiseitō founded by conservatives
- 1887: Peace Preservation Law
- 1889: Meiji Constitution
- 1890: Opening of the Diet of Japan
- 1891: Jiyutō is renamed into Rikken Jiyutō (Constitutional Liberal Party)
- 1896: Rikken Kaishintō is continued by the 'Shimpotō (Progressive Party)
- 1898: Rikken Jiyutō and Shimpotō merge to form the Kenseitō (Constitutional Politics Party )
- 1900: Kenseitō is taken over by the oligarchy and renamed the Constitutional Friends Association (Rikken Seiyukai)
- 1900: Public Order & Police Law of 1900
- 1910: A faction of the former Kenseitō forms the Rikken Kokumintō (Constitutional National Party )
- 1912: Start of the Taishō period
- 1913: A faction of the Rikken Kokumintō forms the Rikken Dōshikai (Constitutional Friendship Association)
- 1916: Rikken Dōshikai becomes the Kenseikai (Constitutional Association)
- 1920: Foundation of the Nihon Shakai Shugi Domei
- 1922: Foundation of the Japan Communist Party
- 1925: Peace Preservation Law of 1925
- 1926: Foundation of the Nihon Rōnōtō (Japan Labor-Farmer Party), Rōdō Nōmintō (Labor-Farmer Party), and the Shakai Minshutō (Socialist People's Party)
- 1928 March 15 Incident
- 1929: April 16 Incident
- 1922: Rikken Kokumintō is renamed Kakushin Kurabu (Reform Club), which later merges with the Rikken Seiyutō.
- 1925: Passage of universal male suffrage laws
- 1926: Start of the Shōwa period
- 1927: Rikken Minseitō formed from the Kenseikai
- 1930: Prime Minister Hamaguchi assassinated
- 1931: March Incident and Imperial Colors Incident
- 1932: May 15 Incident; Prime Minister Inukai assassinated
- 1933: proto-fascist Kokumin Dōmei formed
- 1936: February 26 Incident: Prime Minister Okada Keisuke escapes assassination
- 1936: Fascist Tōhōkai formed
- 1937: Popular Front Incident
- 1940: Imperial Rule Assistance Association formed
Read more about this topic: Political Parties Of The Empire Of Japan