Career
As leader of the Tosa Kin no To, which supported the Sonnō Jōi ("revere the Emperor and expel the barbarians") movement, he tried to take control of the Tosa Han and receive the support of Sakamoto Ryōma, but was arrested for the assassination of Yoshida Tōyō and forced to commit seppuku. He gave orders to Okada Izō, one of the best known assassins of the Bakumatsu period.