# Keiō

Part of a series on the :
History of Japan :
Shōsōin :
PeriodsPaleolithicbefore 14,000 BCJōmon14,000–1000 BCYayoi
1000 BC – 300 ADKofun
300–538 ADAsuka
538–710Nara
710–794HeianFormer Nine Years' WarLater Three-Year WarGenpei War 794–1185KamakuraJōkyū WarMongol invasionsGenkō WarKenmu Restoration 1185–1333MuromachiNanboku-chō periodSengoku period 1336–1573Azuchi–Momoyama
Nanban tradeImjin WarBattle of Sekigahara 1573–1603Edo (Tokugawa)
Tokugawa shogunateInvasion of RyukyuSiege of OsakaSakokuPerry ExpeditionConvention of KanagawaBakumatsuMeiji RestorationBoshin War 1603–1868Meiji
Ryūkyū DispositionInvasion of Taiwan (1874)Satsuma RebellionFirst Sino-Japanese WarTreaty of ShimonosekiTriple InterventionInvasion of Taiwan (1895)Colonization of TaiwanBoxer RebellionRusso-Japanese WarTreaty of PortsmouthJapan–Korea TreatyColonization of Korea 1868–1912Taishō
World War IIntervention in SiberiaGreat Kantō earthquake 1912–1926Shōwa
MilitarismFinancial crisisNanking incidentMukden IncidentInvasion of ManchuriaMay 15 incidentFebruary 26 incidentAnti-Comintern PactTripartite PactSecond Sino-Japanese WarWorld War IIAttack on Pearl HarborPacific WarAtomic bombingsSoviet–Japanese WarSurrender of JapanOccupation of JapanPostwar JapanAnpo protestsEconomic miracleAsset price bubble1926–1989Heisei
Lost DecadesGreat Hanshin earthquakeCool JapanTōhoku earthquakeImperial transition 1989–2019ReiwaCOVID-19 pandemicAbe assassinationNoto earthquake 2019–present :
Topics
Capital punishment
Currency
Earthquakes
Economy
Era names
Education
Empire
Foreign relations
Geography
Historiography
Religion
Buddhism
Christianity
Islam
Judaism
Shinto
Military
Naval
Politics
Post-war
Science and technology
Sports
World Heritage Sites :
Glossary
History
Timeline :
vte :
Keiō (慶応, historically 慶應) was a Japanese era name (年号, nengō, literally "year name") after Genji and before Meiji. The period spanned the years from May 1865 to October 1868. The reigning emperors were Kōmei-tennō (孝明天皇) and Meiji-tennō (明治天皇).

## Change of era

* May 1, 1865 (Genji 2/Keiō 1, 7th day of the 4th month) Keiō gannen (慶応元年): The new era name of Keiō (meaning "Jubilant Answer") 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 (Keiō 2): Goryōkaku completed
* August 29, 1866 (Keiō 2, 20th day of the 7th month): Shōgun Iemochi died at Osaka; and the bakufu petitioned that Hitotsubashi Yoshinobu should be appointed as his successor.
* January 10, 1867 (Keiō 2, 5th day of the 12th month): Yoshinobu was appointed shōgun.
* January 30, 1867 (Keiō 2, 25th day of the 12th month): Emperor Komei died.
* February 13, 1867 (Keiō 3, 9th day of the 1st month): Mutsuhito ascended to the throne as Emperor Meiji.
* November 10, 1867 (Keiō 3, 15th day of the 10th month): An Imperial edict was issued sanctioning the restoration of Imperial government.
* January 6, 1868 (Keiō 3, 10th day of the 12th month): 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 (Keiō 4, 3rd of the 1st month): The Boshin War begins with the Battle of Toba–Fushimi.
* September 3, 1868 (Keiō 4, 17th day of the 7th month): Edo was renamed "Tokyo", i.e. meaning "Eastern Capital".
* October 8, 1868 (Keiō 4, 23rd of the 8th month): Battle of Aizu begins.
* October 12, 1868 (Keiō 4, 27th day of the 8th month): Emperor Meiji is crowned in the Shishin-den in Kyoto.
* October 23, 1868 (Keiō 4/Meiji 1, 8th day of the 9th month): 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 (Keiō 4/Meiji 1, 1st day of the 1st month).

## Keio University

Keio University, which was initially established in 1858 (Ansei 5), seven years before the beginning of the Keiō era, is named after this era. This is the oldest existing institution of higher learning in Japan.