Tale of a Different Kind of Wife - Iruinyobotan

Japanese: 異類女房譚 - いるいにょうぼうたん

…The Dragon Palace is a reflection of the idea of the eternal world, that there is a paradise beyond the sea. A man unilaterally breaking a promise imposed on him by a woman is a characteristic of tales of wives of different species, such as the Snake Wife and the Crane Wife, in which prohibitions are always violated by humans, bringing about unfortunate results. This can be said to be an old tale motif that also appears in the story of Princess Toyotama in the Kojiki. …

From "Tsuru Nyobo"

…A tale of a strange wife. A crane is saved by a man and transforms into a human to become his wife. …

*Some of the terminology used in "Irui Nyobotan" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…竜宮は海上彼方に楽土があるという常世（とこよ）思想の反映であろう。女から課せられた約束を男が一方的に破るのは〈蛇女房〉〈鶴女房〉などの異類女房譚の特色であり，常に人間によって禁止事項が犯され，不幸な結果を招来することになる。これは《古事記》の豊玉姫説話にも現れている古い説話モティーフといえよう。…