Keiō

Change of era

• May 1, 1865 Keiō gannen: The new era name of Keiō was created to mark the Kinmon Incident. The previous era ended and a new one commenced in Genji 2.

  Events of the ''Keiō'' era

• 1866 : Goryōkaku completed
• September 28, 1866 : Shōgun Iemochi died at Osaka; and the bakufu petitioned that Hitotsubashi Yoshinobu should be appointed as his successor.
• January 10, 1867 : Yoshinobu was appointed shōgun.
• January 30, 1867 : Emperor Komei died.
• February 13, 1867 : Mutsuhito ascended to the throne as Emperor Meiji.
• November 10, 1867 : An Imperial edict was issued sanctioning the restoration of Imperial government.
• January 6, 1868 : The restoration of the Imperial government was announced to the kuge. The year 1868 began as Keio 3, and did not become Meiji 1 until the 8th day of the 9th month of Keio 4, i.e., October 23; although retrospectively, it was quoted as the first year of the new era from 25 January onwards.
• January 27, 1868 : The Boshin War begins with the Battle of Toba–Fushimi.
• September 3, 1868 : Edo was renamed "Tokyo", i.e. meaning "Eastern Capital".
• October 8, 1868 : Battle of Aizu begins.
• October 12, 1868 : Emperor Meiji is crowned in the Shishin-den in Kyoto.
• October 23, 1868 : The nengō is formally changed from Keiō to Meiji; and a general amnesty is granted. The adoption of the Meiji nengō was done retroactively to January 25, 1868.

  Keio University