Hoori
Hoori and his wife lived in a palace beneath the sea for three years, but Hoori began to feel homesick and wanted to return to his own country. His brother forgave him after he returned the lost hook, and Toyotama-hime gave birth to their son, Ugayafukiaezu. However, during Toyotama-hime's childbirth, she made Hoori promise not to peek at her true form. But Hoori broke his promise and saw that she was actually a dragon, specifically a wani. Toyotama-hime was embarrassed and returned to her father, never to return. Ugayafukiaezu married Toyotama-hime's sister, Tamayori-hime, who raised him, and she gave birth to Emperor Jimmu, the first Emperor of Japan. Hoori ruled over Takachiho in Hyūga Province for 560 years.