Regional tales of cloth turning into snakes are scarce, but stories across Japan tell of weaving sounds rising from the depths of ponds or pools—places called Weaving Abyss or Weaving Pond—linking water deities with loom work. In early modern performing arts, the term “nijūhiro” (twenty hiro) appears to express a giant serpent’s size; scholars suggest wordplay between hiro (a span) and hata (loom), as well as the rhyme of wicked intent and serpent form, as possible creative triggers. No specific real-world place or person is identified.