Kiki Sidestream Saga · From Heavenly Descent to Jimmu's Ancestors

After the heavenly grandson Ninigi descended to Hyuga Takachiho, his marriage with the two daughters of Ōyamatsumi (the god of mountains)—Konohana-sakuyahime and Iwanaga-hime, tied to the myth of human mortality's origin—led to the birth of Yamasachihiko (Hoori) and Umisachihiko (Hoderi) through fire-trial childbirth, the brotherly conflict between them, and Yamasachihiko's underwater marriage with Toyotama-hime, daughter of the sea god, culminating in the broken 'do-not-look' taboo. This cluster bundles the seven deities forming the grandparents and great-grandparents of the first Emperor Jimmu, structuring the 'imperial-lineage genesis layer' that bridges the first half of Kiki mythology (creation, land-yielding) and the second half (Jimmu's eastern expedition).