The Yamata no Orochi is an eight-headed, eight-tailed serpent whose body spans eight valleys, with trees growing from its back and a belly that oozes blood. This episode treats the monster as the subject of a biography, starting with its defeat by the storm god Susanoo in the Kojiki and Nihon Shoki, where eight vats of strong sake, a gated fence, and a sleeping serpent produce the sacred sword Kusanagi from its middle tail. The conversation then peels back the supernatural layer to ask what the ancient Izumo region was actually recording.

The discussion reads the Orochi as a personification of the flood-prone Hii River, whose iron-rich reddish floodwaters and debris-laden surface match the beast's description, and reads the sacrificed daughter as the annual loss of the rice harvest. It then connects the sword in the tail to the kanna-nagash ...