Jōgan

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.^[1] During this time, the emperors were Seiwa-tennō (清和天皇) and Yōzei-tennō (陽成天皇).^[2]

Events of the Jōgan era

Aerial view of crater of Mount Fuji which erupted in Jōgan 6

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.^[3]

864 (Jōgan 6, 5th month): Mount Fuji erupted during 10 days. Cinders and ash fell to earth as far away as Kai Province.^[4]

869 (Jōgan 10): Prince Sadaakira was born. He will later become Emperor Yōzei.^[5]

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.^[5]

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).^[6] Soon after,^[7] Emperor Yōzei accepted the monarch's role and duties and powers (sokui).^[5] This was confirmed in ceremonies.^[8]

A collection of laws issued after 811 was published during this era. It was called the Jōgan kyaku-siki.^[9]

Related pages

Heian period

References

↑ Nussbaum, Louis-Frédéric. (2005). "Jōgan" in Japan Encyclopedia, p. 429.
↑ Titsingh, Isaac. (1834). Annales des empereurs du japon, p. 115-121; Brown, Delmer et al. (1979). Gukanshō, p. 287; Varley, H. Paul. Jinnō Shōtōki, pp. 166-17.
↑ Titsingh, p. 116.
↑ Titsingh, p. 118.
↑ ^5.0 ^5.1 ^5.2 Titsingh, p. 122.
↑ Titsingh, p. 122; Brown, p. 287.
↑ Yozei was formally established as emperor on January 20, 877 (Gangyō 1, 3rd day of the 1st month).
↑ 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 2012-1-6.
↑ Nussbaum, "Jōgan kyaku-siki" in Japan Encyclopedia, p. 429.

Other websites

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

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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[1] Nussbaum, Louis-Frédéric. (2005). "Jōgan" in Japan Encyclopedia, p. 429.

[2] Titsingh, Isaac. (1834). Annales des empereurs du japon, p. 115-121; Brown, Delmer et al. (1979). Gukanshō, p. 287; Varley, H. Paul. Jinnō Shōtōki, pp. 166-17.

[3] Titsingh, p. 116.

[4] Titsingh, p. 118.

[titsingh122-5] 5.0 ^5.1 ^5.2 Titsingh, p. 122.

[6] Titsingh, p. 122; Brown, p. 287.

[7] Yozei was formally established as emperor on January 20, 877 (Gangyō 1, 3rd day of the 1st month).

[8] 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 2012-1-6.

[9] Nussbaum, "Jōgan kyaku-siki" in Japan Encyclopedia, p. 429.

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