Masatada was the eldest son of Torayasu. He fought in the Battle of Usuigatoge and Musashi-Matsuyama (1563) but was killed the following year by a riding accident. He is probably best known for an incident involving one of his wounded retainers. When the man's bleeding did not stop, Masatada advised him to drink horse feces and water to help clotting (a folk remedy). When the wounded man was hesitant to do so, Masatada himself consumed some of the concoction for him. Encouraged, his retainer drank from the same cup and it is said he recovered.