Ryūjin

Ryūjin or Ryōjin (龍神, "dragon god"^?), which in some traditions is equivalent to Ōwatatsumi, was the tutelary deity of the sea in Japanese mythology. This Japanese dragon symbolized the power of the ocean, had a large mouth, and was able to transform into a human shape. Ryūjin lived in Ryūgū-jō, his palace under the sea built out of red and white coral, from where he controlled the tides with magical tide jewels. Sea turtles, fish and jellyfish are often depicted as Ryūjin's servants.

Ryūjin was the father of the beautiful goddess Otohime who married the hunter prince Hoori. The first Emperor of Japan, Emperor Jimmu, is said to have been a grandson of Otohime and Hoori's. Thus, Ryūjin is said to be one of the ancestors of the Japanese imperial dynasty.

According to legend, the Empress Jingū was able to carry out her attack into Korea with the help of Ryūjin's tide jewels. Upon confronting the Korean navy, Jingū threw the kanju (干珠, "tide-ebbing jewel"^?) into the sea, and the tide receded. The Korean fleet was stranded, and the men got out of their ships. Jingū then threw down the manju (満珠, "tide-flowing jewel"^?) and the water rose, drowning the Korean soldiers. An annual festival, called Gion Matsuri, at Yasaka Shrine celebrates this legend.

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