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Jōgan facts for kids

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Jōgan (貞観) was a Japanese era name (年号, nengō,, lit. "year name") after Ten'an and before Gangyō. This period started in April 859 and ended in April 877. During this time, the emperors were Seiwa-tennō (清和天皇) and Yōzei-tennō (陽成天皇).

Events of the Jōgan era

Mount Fuji-ISS019-E-05286 lrg
Aerial view of crater of Mount Fuji which erupted in Jōgan 6
Jogan-eiho
Copper coin minted during the Jōgan era
  • 859 (Jōgan 1, 1st month): New Year's festivities were suspended during national mourning for the death of Emperor Montoku.
  • 864 (Jōgan 6, 5th month): Mount Fuji erupted during 10 days. Cinders and ash fell to earth as far away as Kai Province.
  • 869 (Jōgan 10): Prince Sadaakira was born. He will later become Emperor Yōzei.
  • 9 July 869 (May 26, Jōgan 11). The 869 Sanriku earthquake and tsunami causes damage at the Sanriku coast near Sendai.
  • 870 (Jōgan 11): Sadaakira was named Seiwa's heir.
  • 876 (Jōgan 17, 11th month): In the 18th year of Seiwa's reign, the emperor abdicated. His five-year-old son received the succession (senso). Soon after, Emperor Yōzei accepted the monarch's role and duties and powers (sokui). This was confirmed in ceremonies.

A collection of laws issued after 811 was published during this era. It was called the Jōgan kyaku-siki.

Related pages

Jōgan 1st 2nd 3rd 4th 5th 6th 7th 8th 9th 10th 11th 12th 13th 14th 15th 16th 17th 18th 19th
859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877
Preceded by:
Ten'an
Era or nengō:
Jōgan
Succeeded by:
Gangyō
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