Tennō Jimmu was born on 13 February 712 B.C. in Kyushu. His father was Hikonagisatake-ugayafukiaezu-no -mikoto and his mother was Tamayori-hime, the daughter of the god of the sea.
His name was Sanu-no-mikoto, and he was also known as Kamuyamato- iwarehiko-no-mikoto. The posthumous name Jimmu was not given to him until the latter part of the eighth century. Accounts of him are preserved in the Kojiki and Nihon Shoki.