In October, 416, in order to resolve a confusion in the Uji-kabane system (the system of clans and hereditary titles) among various clans, the Emperor carried out Kugatachi ordeal (also known as kukatachi or kukadachi, which refers to hot-water ordeal) at Amakashi no oka Hill in Asuka.
4年9月（415年10月）、諸氏族の氏姓の乱れを正すため、飛鳥甘樫丘にて盟神探湯（くがたち）を実施する。