Susano-O-no-Mikoto descends to the mountain Torikamiyama in Izumo, where he comes upon an old couple weeping beside their daughter. The man says that he's a god of the land (kunitsukami) and that each year the eight-headed, eight-tailed serpent, the dragon-prince Yamata no Orochi has devoured one of his daughters [some versions say 12 most say 8 daughters], and that the time has come for him to claim the last. Susano-o-no-Mikoto transforms the girl, Kushinada Hime, into a comb, which he puts in his hair, and orders that a special wine [The first gift of Saki to mortal men] be brewed and barrels of it placed along a fence with eight apertures or gates. When the serpent drinks the potion and falls into a drunken sleep, Susano-O-no-Mikoto severs each of the heads with his sword. As Susano-o-no-Mikoto is dismembering the dragons body to dispel the dragon-prince's strong magics in one of the tails he discovers a sword, which he presents to Amaterasu. This is the sword that is later known as Kusanagi (Mower of Grass). It is given to Ninigi no Mikoto by Amaterasu as one of the three symbols of his authority over Ashihara no Nakatsukuni.

And these three symbols become the Three Sacred Treasures of the Imperial Family of Japan, "Kenji(sacred Kusanagi sword called "Grasscutter"and Magatama, coma shaped beads (supposedly a jade and/or splendid jewels) and Yata no Kagami(mirror), thus begins the Story or Legend of Imperial Japans beginings.