According to one theory, a Noh play called 'Tsurukame' (Crane and Turtle), in which a turtle lived for ten thousand years, while a crane had a life of a thousand years, was created from this version of the story, and the custom of having a turtle or crane as a good luck charm spread as a result of this.
一説に、ここから「亀は万年の齢を経、鶴は千代をや重ぬらん」と謡う能楽の「鶴亀」などに受け継がれ、さらに、鶴亀を縁起物とする習俗がひろがったとする。