It is described in Nihonshoki (Chronicles of Japan) that his father, Emperor Keiko, confined his princes to each of their provinces and counties, except for the three princes, Iokiiribiko no miko, Seimu, and YAMATO Takeru no Mikoto.
父景行天皇は、それらの皇子たちをそれぞれの国や郡に封じたが、彼と成務・日本武尊の3人だけは封じなかったと、日本書紀に書かれている。