757Tenpyō-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.
Events of the Tenpyō-hōji era
757 (Tenpyō-hōji 1): The new era begins on the 2nd day of the 8th month of Tenpyō-shōhō 9.
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.
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).