1259Shōgen gannen (承元元年): The new era name was created to mark an event or a number of events. The years of the Shōgen era was in a period marked by famine and epidemics; and the era name was changed in quick succession in the hope that this might bring them to a close. The previous era ended and a new one commenced in Shōka 3.
1259 (Shōgen 1, 11th month): In the 14th year of Go-Fukakusa-tennō 's reign (後深草天皇14年), the emperor abdicated; and the succession (senso) was received by his younger brother. Shortly thereafter, Emperor Kameyama is said to have acceded to the throne (sokui).