Yagyū Shinkage-ryū
From 1603 to 1607, he served Katō Kiyomasa. Thereafter, he became an itinerant warrior. Beginning in 1615, he served Tokugawa Yoshinao, the founder of the Owari branch of the Tokugawa clan. He directly instructed Yoshinao in the Yagyū Shinkage-ryū.