The kami is an earthly diety whom Emperor Jinmu met during his expedition to the east when he reaches the Hayasui no to (Hoyo strait: the strait between Oita Prefecture and Ehime Prefecture), and the kami guides the Emperor across the strait.
神武天皇が東征において速吸門（はやすいのと）で出会った国つ神で、船路の先導者となる。