The Ogata clan's leader was originally a retainer of Taira no Shigemori. When the wars between the Taira and Minamoto began, Ogata no Saburo Koreyoshi switched sides after the Minamoto killed his rival Kikuchi Jiro, and his armies played the key role in securing Minamoto no Yoritomo's control of Japan by expelling the Taira from Kyūshū. It was Saburo who secured Prince Antoku and lead the main battle against the Taira at Dan-no-ura. He also helped to build the once famous Oka Castle for the first established shōgun of Japan..
