Initially Suketada served Akechi Mitsuhide and then Shibata Katsutoyo. After Katsutoyo died, Suketada served Toyotomi Hideyoshi. He was given 70,000 koku at Imabari, Iyo Province and became a daimyo. In 1600, at the Battle of Sekigahara, initially he was part of "Western Army" of Ishida Mitsunari. During the battle he betrayed Mitsunari and switched sides to join Tokugawa Ieyasu's "Eastern Army" along with Kobayakawa Hideaki, Wakisaka Yasuharu, Kuchiki Mototsuna and Akaza Naoyasu. Ieyasu won the battle and became the de facto ruler of Japan. Ieyasu seized Suketada's domain after the battle.