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Tenpyō-hōji (天平宝字) was a Japanese era name (年号, nengō, lit. "year name") after Tenpyō-shōhō and before Tenpyō-jingo. This period spanned the years from August 757 through January 765.^[1] The reigning Emperor was Junnin-tennō (淳仁天皇), who was a mere figurehead while authority was in the hands of Fujiwara no Nakamaro and during the later years of the era increasingly with retired Empress Kōken and the monk Dōkyō.

• 757 Tenpyō-hōji gannen (天平宝字元年): 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-shōhō 9, on the 2nd day of the 8th month.^[2]

• 757 (Tenpyō-hōji 1): The new era begins on the 2nd day of the 8th month of Tenpyō-shōhō 9.^[3]
• 760 (Tenpyō-hōji 4): Additional coins were put into circulation – each copper coin bearing the words Mannen Ten-hō, each silver coin bearing the words Teihei Genhō, and each gold coin bearing the words Kaiki Shōhō.^[4]
• 764: Fujiwara no Nakamaro Rebellion
• 26 January 765 (Tenpyō-hōji 9, 1st day of the 1st month): In the 6th year of Junnin-tennō's reign (淳仁天皇6年), the emperor was deposed by his adoptive mother; and the succession (senso) was received by former-Empress Kōken. Shortly thereafter, Empress Shōtoku is said to have acceded to the throne (sokui).^[5]

• Appert, Georges and Hiroshi Kinoshita. (1888). Ancien japon. Tokyo: Kokubunsha. OCLC 458497085
• Brown, Delmer M. and Ichirō Ishida, eds. (1979). Gukanshō: The Future and the Past. Berkeley: University of California Press. ISBN 978-0-520-03460-0; OCLC 251325323
• Nussbaum, Louis-Frédéric and Käthe Roth. (2005). Japan encyclopedia. Cambridge: Harvard University Press. ISBN 978-0-674-01753-5; 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. ISBN 9780231049405; OCLC 6042764

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