Otters that become girls, and the ox that would not move

What the record says

Otters often take the form of a young girl to deceive people. A strong man who lived by the river took his ox out to cut grass; on the way the ox stopped and would not move, and then there was the sound of something plunging into the river. That was the otter's doing.

Our summary in English of the record as catalogued; the original card is in Japanese.