was a after Tenpyō-jingo and before Hōki. This period spanned the years from August 767 through October 770.Nussbaum, Louis-Frédéric. (2005). "Jingo-keiun" in Japan encyclopedia, p. 422; n.b., Louis-Frédéric is pseudonym of Louis-Frédéric Nussbaum, see Deutsche Nationalbibliothek Authority File . The reigning empress was . This was the same woman who had reigned previously as the former .Titsingh, Isaac. (1834). Annales des empereurs du Japon, pp. 78-81; Brown, Delmer et al. (1979). Gukanshō, pp. 274-276; Varley, H. Paul. (1980). Jinnō Shōtōki. p. 143-147.
Change of era 767 : The new era name was created to mark an event or series of events. The previous era ended and the new one commenced in Tenpyō-jingo 3, on the 18th day of the 8th month of 767.Brown, p. 276.
Events of the Jingo-keiun era 8 September 769 (Jingo-keiun 3, 4th day of the 8th month): In the 5th year of Shōtoku-tennōs reign (称徳天皇5年), the empress died; and she designated Senior Counselor Prince Shirakabe as her heir.Brown, pp. 276-277. 770 (Jingo-keiun 3, 4th day of the 8th month): The succession (senso) was received by a 62-year-old grandson of Emperor Tenji.Brown, p. 276; Varley, p. 44, 148; 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. 770 (Jingo-keiun 3, 1st day of the 10th month): Emperor Kōnin was said to have acceded to the throne (sokui) in a formal ceremony;and the nengō was changed to Hōki on the very same day.Titsingh, p. 81; Brown, p. 277; Varley, p. 44, 148.
The Jingō-kaihō''' was a copper coin issued from 765 to 796. It had a diameter of about 23 mm and a weight of between 3.4 and 4.5 grams.Nussbaum, "Jingō-kaihō" in Japan encyclopedia, p. 422.
See also Wadōkaichin
Notes
References Brown, Delmer M. and Ichirō Ishida, eds. (1979). Gukanshō: The Future and the Past. Berkeley: University of California Press. ; OCLC 251325323 Nussbaum, Louis-Frédéric and Käthe Roth. (2005). Japan encyclopedia. Cambridge: Harvard University Press. ; OCLC 58053128 Titsingh, Isaac. (1834). Nihon Odai Ichiran; ou, Annales des empereurs du Japon. Paris: Royal Asiatic Society, Oriental Translation Fund of Great Britain and Ireland. OCLC 5850691 Varley, H. Paul. (1980). A Chronicle of Gods and Sovereigns: Jinnō Shōtōki of Kitabatake Chikafusa.'' New York: Columbia University Press. ; OCLC 6042764
External links National Diet Library, "The Japanese Calendar" -- historical overview plus illustrative images from library's collection