Nin'an

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

Nin'an (仁安), also known as Ninnan, was a Japanese era name (年号, nengō, lit. "year name") after Eiman and before Kaō. This period spanned the years from August 1166 through April 1169.^[1] The reigning emperors were Rokujō-tennō (六条天皇) and Takakura-tennō (高倉天皇).^[2]

Change of era

February 3, 1166 Nin'an gannen (仁安元年): The new era name was created to mark an event or series of events. The previous era ended and a new one commenced in Eiman 2, on the 27th day of the 8th month of 1166.^[3]

Events of the Nin'an era

1168 (Nin'an 3, 2nd month ): Rokujō was deposed at age 5, and he received the title Daijō-daijin tennō.^[4]
March 30, 1168 (Nin'an 3, 19th day of the 2nd month): In the 3rd year of Rokujō-tennō's reign (六条天皇3年), the emperor was deposed by his grandfather, and the succession (senso) was received by his cousin, the third son of the retired-Emperor Go-Shirakawa. Sometime thereafter, Emperor Takakura is said to have acceded to the throne (sokui), and he is proclaimed emperor.^[5]
April 29, 1168 (Nin'an 3, 20th day of the 3rd month): Takakura succeeds Rokujo on the Chrysanthemum Throne.^[6]

References

^ Nussbaum, Louis-Frédéric. (2005). "Nin'an" in Japan Encyclopedia, p. 714, p. 714, at Google Books; n.b., Louis-Frédéric is pseudonym of Louis-Frédéric Nussbaum, see Deutsche Nationalbibliothek Authority File Archived 2012-05-24 at archive.today.
^ Titsingh, Isaac. (1834). Annales des empereurs du Japon, pp. 194-195; Brown, Delmer et al. (1979). Gukanshō, pp. 329-330; Varley, H. Paul. (1980). Jinnō Shōtōki. p. 212.
^ Brown, p. 330.
^ Titsingh, p. 195.
^ Titsingh, p. 195; Brown, p. 330; 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.
^ Kitagawa, H. (1975). The Tale of the Heike, p.783.