He is the patriarch of the Hayato people (an ancient people from southern Japan), is also called Umisachihiko, and is an older brother of Hikohohodemi no Mikoto (also known as Yamasachihiko), who was the grandfather of the first emperor, Jinmu.
これは隼人族の祖であり、海幸彦とも呼ばれ、神武天皇の祖父で山幸彦とも言われている、彦火火出見尊（ひこほほでみのみこと）の兄にあたる。