Ryujin controls the tidal flows with the magical Tide Jewels. Many centuries ago the Empress Jingo planned an invasion of Korea. She prayed to Ryujin and sent the beach-god Isora to his temple. There he was given the Tide Jewels for the empress. The Japanese fleet then set sail towards Korea and the Korean fleet sailed out to confront them. When she saw the approaching fleet, Jingo quickly threw the Low Tide Jewel into the sea so that the tide receded at once and the Korean fleet was beached. The Koreans all jumped out onto the mudflats but at that moment the empress threw the High Tide Jewel and a tidal wave drowned the men. The tidal wave carried the Japanese fleet on to the coast, into the harbor and to victory. Later Ryujin personally presented the Tide Jewels, on a beautiful pink shell, to Prince Ojin, Empress Jingo's son.
"Luminous Being". The Japanese dragon god of the sea. Ryujin lives in Ryugu his palace at the bottom of the sea. His daughter Otohime (Toyo-Tame) married prince Hoori. The sea-king is depicted with a large mouth. Turtles are regarded as his messengers.