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964–968	Kōhō
968–970	Anna
970–973	Tenroku
973–976	Ten'en
976–978	Jōgen
978–983	Tengen
983–985	Eikan
985–987	Kanna
987–988	Eien
988–990	Eiso
990–995	Shōryaku
995–999	Chōtoku
999–1004	Chōhō
1004–1012	Kankō
1012–1017	Chōwa
1017–1021	Kannin
1021–1024	Jian
1024–1028	Manju
1028–1037	Chōgen
1037–1040	Chōryaku

806–810	Daidō
810–824	Kōnin
824–834	Tenchō
834–848	Jōwa
848–851	Kashō
851–854	Ninju
854–857	Saikō
857–859	Ten'an
859–877	Jōgan
877–885	Gangyō
885–889	Ninna
889–898	Kanpyō
898–901	Shōtai
901–923	Engi
923–931	Enchō
931–938	Jōhei
938–947	Tengyō
947–957	Tenryaku
957–961	Tentoku
961–964	Ōwa

645–650	Taika
650–654	Hakuchi
686–686	Shuchō
701–704	Taihō
704–708	Keiun
708–715	Wadō
Nara
715–717	Reiki
717–724	Yōrō
724–729	Jinki
729–749	Tenpyō
749	Tenpyō-kanpō
749–757	Tenpyō-shōhō
757–765	Tenpyō-hōji
765–767	Tenpyō-jingo
767–770	Jingo-keiun
770–781	Hōki
781–782	Ten'ō
782–806	Enryaku

Jōan (承安) was a Japanese era name (年号, nengō, lit. "year name") after Kaō and before Angen. This period spanned the years from April 1171 through July 1175.^[1] The reigning emperor was Takakura-tennō (高倉天皇).^[2]

Change of era

1171 Jōan gannen (承安元年): The new era name was created to mark an event or series of events. The previous era ended and a new one commenced in Kaō 3, on the 21st day of the 4th month of 1171.^[3]

Events of the Jōan era

1172 (Jōan 1, 3rd day of the 1st month): The emperor had attained the age of 11 years; accordingly, the hair on his head was shaved as a sign of his coming of age.^[4]
1171 (Jōan 1, 13th day of the 1st month): The young emperor made a visit to the home of former-Emperor Go-Shirakawa, where he first met Tiara-no Tokoku, the adopted daughter of Go-Shirakawa and the actual daughter of Taira no Kiomori. He accepted the 15-year-old girl as one of his consorts, and she moved into his palace.^[5]
1171 (Jōan 2, 10th day of the 2nd month): Taira Kiyomori's daughter, Tokuko, becomes Emperor Takakura's his secondary empress (chūgo).^[6]
1172 (Jōan 2, 10th month): Takakura visited the Fushimi Inari-taisha and the Yasaka Shrine.^[7]
1172 (Jōan 2, 12th month): Matsu motofusa ceased to be regent (sesshō) and daijō-daijin; and he obtained the office of kampaku.^[8]
1173 (Jōan 3, 1st day of the 4th month): Shinran, founder of Jodo Shinshu, was born and named Matsuwakamaro
1173 (Jōan 3, 4th month): The emperor visited the Iwashimizu Shrine and the Kamo Shrines.^[7]
1173 (Jōan 3, 10th month): The emperor's mother, Ken-shun-mon In, founded the Saishōkō Cloister, which was consecrated at a dedication ceremony in which she was a participant.^[9]
1174 (Jōan 4, 1st month): The emperor made visits to his father and to his mother.^[7]

Notes

^ Nussbaum, Louis-Frédéric. (2005). "Jō-an" in Japan Encyclopedia, p. 427, p. 427, at Google Books; n.b., Louis-Frédéric is pseudonym of Louis-Frédéric Nussbaum, see Deutsche Nationalbibliothek Authority File.
^ Titsingh, Isaac. (1834). Annales des empereurs du Japon, pp. 195-200; Brown, Delmer et al. (1979). Gukanshō, pp. 330-333; Varley, H. Paul. (1980). Jinnō Shōtōki. pp. 212-214.
^ Brown, p. 332.
^ Titsingh, p. 196; Brown, 331.
^ Titsingh, p. 196.
^ Kitagawa, H. (1975). The Tale of the Heike, p. 783; Titsingh, p. 197.
^ ^a ^b ^c Titsingh, p. 197.
^ Titsingh, p. 197; Brown, p. 331.
^ Titsingh, p. 197, Brown, p. 333.