One of the most famous folk stories concerning ningyo is called Yao Bikuni (八百比丘尼, "eight-hundred (years) Buddhist priestess") or Happyaku Bikuni.
Salah satu kisah yang menceritakan ningyo berjudul Yao Bikuni (八百比丘尼, "Bhiksuni delapan ratus ") atau Happyaku Bikuni.