Tsuru no Ongaeshi

Tsuru no Ongaeshi (鶴の恩返し; lit. "Crane's Return of a Favor") is a story from Japanese folklore about a crane who returns a favor to a man. A variant of the story where a man marries the crane that returns the favor is known as Tsuru Nyōbō (鶴女房; "Crane Wife").

According to Japanese scholar Seki Keigo, the story is "one of the best known" tales in Japan about supernatural and enchanted spouses.