Tsuru no Ongaeshi

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

The man's curiosity takes over and he peeks in, realizing that the woman is the crane whom he saved.

When the crane sees that the man has found out her true identity, she says that she cannot stay there anymore and flies away to never come back.

To make money, the crane wife plucks her own feathers to weave silk brocade, which the man sells, but she becomes increasingly ill as she does so.

When the man discovers his wife's true identity and the nature of her illness, devastated by the truth, he demands her to stop.

It is there she explains she was trying to repay his kindness, and asks him to use the money from selling the cloth to take care of their child before flying away.

They become married, and the wife cooks the husband a delicious bean soup each day.

He peeks in on her cooking, and discovers that she is urinating clam juice into the soup, so he chases her away.

When the wife realizes he knows she says she must return to her former home, and bids the husband visit her at the pond the following day.

In The Snake Wife, a woman appears in a widower's doorway asking to stay the night.