Ten'an

was a  after Saikō and before Jōgan.  This period started in February 857 and ended in April 859.Nussbaum, Louis-Frédéric. (2005). "Ten'an" in Japan Encyclopedia, p. 957.  During this time, the emperors were  and .Titsingh, Isaac. (1834). Annales des empereurs du japon, pp. 112-115; Brown, Delmer et al. (1979). Gukanshō, pp. 264-265; Varley, H. Paul. (1980). Jinnō Shōtōki, p. 165.

Events of the Ten'an era
 27 September 858 (Ten'an 2, 27th day of the 8th month): Emperor Montoku dies; and the succession (senso) was received by his eldest son. Emperor Seiwa accepted the monarch's role and duties and powers (sokui).Titsingh, pp. 115; Brown, p. 286; Imperial Household Agency (Kunaichō), 文徳天皇 (55); retrieved 2012-5-22.  This was confirmed in ceremonies.Varley, p. 44; a distinct act of senso is unrecognized prior to Emperor Tenji; and all sovereigns except Jitō, Yōzei, Go-Toba, and Fushimi have senso and sokui in the same year until the reign of Emperor Go-Murakami. Compare Imperial Household Agency (Kunaichō),  Ceremony of Accession (Sokui-no-Rei); retrieved 2012-2-16. The start of Seiwa's reign was announced at the Ise Shrine (Kotai-jingu) at Ise and at all the tombs of the imperial family.

 15 December 858 (Ten'an 2, 7th day of the 11th month): The emperor's grandfather is named regent (sesshō).

Related pages
 Heian period

References

 Other websites 
 National Diet Library, "The Japanese Calendar" -- historical overview plus illustrative images from library's collection

Ten'an1st2nd3rd  857  858  859 
Preceded by:SaikōEra or nengō:Ten'anSucceeded by:Jōgan

Category:Japanese eras
Category:850s establishments in Japan
Category:850s disestablishments in Japan
Category:850s establishments