With respect to legends of his birth, one legend has it that his mother was a mountain witch and his father was the god of lightning and another where he was a baby that was given to Yaegiri by a red dragon on the top of Mt. Kintoki.
出生の伝説は、母親が山姥で、雷神の子供を孕んで産まれてきたとするものや、金時山の頂上で赤い龍が八重桐に授けた子というものも存在する。