Although the mystery of the coincidence of name between Hikohohodemi-no-mikoto and Jimmu Tennow has not yet solved, it seems necessary for us to take into our consideration that in addition to the vertical relation of the Heaven and the Earth, there would be third intermediary aspect, the Sea. The reason why the complier of the Chronicle of Japan inserted the story of Hikohohodemi-no-mikoto after that of the descending of Ninigi-no-mikoto form the Heaven to the Earth would be that he should have been eager to suggest the existence of the third party.