Ōyamatsumi

In the Kojiki and related creation genealogies (Kamiumi), Ōyamatsumi is presented among the elder generation of kami born in the primordial age associated with Izanagi and Izanami; he functions as an ancestral node whose offspring populate later mythic narratives. Variant textual traditions in the Nihon Shoki and later medieval scholastic charts present alternate filiations for certain figures (for example, some later charts list Ashinazuchi and Tenazuchi as his children). In the Tenson Kōrin account he interacts with Ninigi-no-Mikoto by offering his daughters Konohanasakuya-hime and Iwanaga-hime; when Ninigi sends Iwanaga-hime back, Ōyamatsumi remarks that the rejection shortens the heavenly grandson's intended longevity, an etiological element linking divine marriage choices to human / imperial fortunes.

Classical narrative sources supplied do not provide a detailed physical description of Ōyamatsumi. Rather than a fixed anthropomorphic portrait, his presence in the tradition is attested through genealogy and place: he is enshrined and venerated at Ōyamazumi Shrine on Ōmishima, and cultic representation is therefore principally mediated by shrine practice and local sacred objects rather than by standardized textual iconography in the cited sources. The textual corpus emphasizes his status as an elder mountain/island/sea kami and progenitor rather than describing a consistent physical form.

The primary functions attributed to Ōyamatsumi in the cited sources are genealogical and territorial: he fathers numerous kami (with Kaya-no-hime in Kojiki producing eight named offspring and additional offspring named without a mother in the lists), acts as a regional and landscape ancestor linked to mountains, islands, and the sea, and plays a role in sanctioning marriage alliances of the heavenly line (offering daughters to Ninigi). Secondary summaries associate him with war in modern descriptions, but the core texts emphasize lineage, place-guardianship, and the offering of daughters (Konohanasakuya-hime and Iwanaga-hime) that bear on imperial legitimacy and human mortality rather than enumerating overt combative feats.