Imagawa Yoshimoto
In 1558, Suzuki Shigeteru, lord of Terabe Castle, defected from the Imagawa in favor of an alliance with Oda Nobunaga. The Imagawa responded by sending an army under the command of Matsudaira Motoyasu, a young vassal of Imagawa Yoshimoto. Terabe Castle was the first of a series of battles waged against the Oda clan.