A commander in Yamato during the Sengoku who became head of his clan in 1533. He formed a peace alliance with the Tsutsui Clan in 1540 and married the daughter of Tsutsui Junkou, bringing about the golden age of the Toichi Clan. He built Ryuuouzan Castle, one of the largest castles in Yamato. He was said to be a superior warrior as well as a talented poet. At his sudden death of illness in 1545 at the age of 49, he was succeeded by his son and heir Toichi Tookatsu.