Inahi no Mikoto
Inahi no Mikoto (Japanese: 稲飯命, 741-681 BC according to traditional dating) was a Japanese legendary character. In Japanese traditional mythology, he was a brother of Emperor Jimmu, the first Emperor who according to tradition lived in the 7th century BC. His name Inahi means "boiled rice". Rule over Korea 
According to the Kojiki, he became a King over part of Korea which is speculated to be near Gaya confederacy. However, according to the Shinsen Shōjiroku, it is stated that he was the ancestor to the king of Silla. References 

Japanese mythology
Mythological characters