The Husband of the Rat's Daughter is a Japanese fairy tale.
Andrew Lang included it in The Brown Fairy Book.
They offered her to the sun, telling him they wanted a son-in-law who was greater than all.
The sun told them that he could not take advantage of their ignorance: the cloud, which blotted out his face, was greater.
The wall told them that a rat could reduce it to powder with its teeth.