Takechiyo Matsudaira was a hostage between Oda and Imagawa when he was young. At the age of 22, he changed his name into Ieyasu and later also did his family name into Tokugawa. His legal wife, who was jealous and Genkyo allied each other and schemed to occur an internal trouble. But the plot was detected by Oda and he executed them. At last Ieyasu's fear was vanished and he wlould be a winner in the Warring States period later.