What traditional use was made of the dried and sterilized droppings of the *uguisu*?
Answer
It was used as a cosmetic remedy for skin brightening and wrinkles.
Known as *Uguisu no fun*, the dried and sterilized droppings were traditionally utilized as a cosmetic remedy, believed to help brighten skin and reduce fine wrinkles, and also as a cleaner for delicate fabrics.

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