日本武尊
Keikō sent Yamato Takeru to the eastern land whose people disobeyed the imperial court. Yamato Takeru met his aunt Princess Yamato-hime, the highest priestess of Amaterasu at Ise Grand Shrine (in Ise Province) and grieved, "my father wishes I would die?" Princess Yamatohime-no-mikoto showed him compassion and lent him a holy sword named "Ame no Murakumo no tsurugi (Kusanagi no tsurugi)", which Susanoo, the brother god of Amaterasu, found in the body of the eight-headed great serpent, Yamata no Orochi. Yamato Takeru went to the eastern land. He lost his wife Oto tachibana-hime during a storm when she sacrificed herself to soothe the anger of the sea god. He defeated many enemies in the eastern land, and legend has it that he and a local old man composed the first sedōka in Kai Province with Mount Tsukuba (now in Ibaraki Prefecture) as its theme. On his return he blasphemed a local god of Mount Ibuki, which sits on the border of Ōmi Province and Mino Province. The god cursed him with disease and he fell ill.