Ten'ō
22 December 781 (Ten'ō 1, 3rd day of the 12th month):  In 11th year of  the reign of Emperor Kōnin's reign (光仁天皇11年), he abdicated. The succession (senso) was received by his son.  Soon after, Emperor Kammu is said to have accepted the monarch's role and duties and powers (sokui).  This was confirmed in ceremonies.