Taishō is a period in the history of Japan dating from 30 July 1912 to 25 December 1926, coinciding with the reign of the Emperor Taishō. The new emperor was a sickly man, which prompted the shift in political power from the old oligarchic group of elder statesmen to the Imperial Diet of Japan and the democratic parties. Thus, the era is considered the time of the liberal movement known as the "Taishō democracy" in Japan; it is usually distinguished from the preceding chaotic Meiji period and the following militaristic-driven first part of the Shōwa period.