According to this well-known theory, the tribe to which her grand-father, Mishima-no-mizokui and her mother, Sya-tatara-hime as well as Hime-tatara-isukeyori-hime belonged, should have been a powerful group who produced valuable ironware including swords, arrowheads and halberds or so in old times. Ookume-no-mikoto, who nominated her for the future Oho-kisaki, might take this matter into his consideration in order to strengthen and stabilize their nation after the accession of the Sumera-mikoto.
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