Yagyū Shinkage-ryū
Initially weaker than his brothers and father, a kōan tells how he managed to become an expert after training his "zanshin" (vigilance) for several years in a temple. Despite his success and fame, he was defeated in a single stroke by Yagyū Renya Toshikane (fourth headmaster of the Yagyū Shinkage-ryū), who had previously fought, before Tokugawa Yoshinao lord of Owari, over 30 duels without being hit. It is said since that time, Owari Yagyū and Edo Yagyū broke ties.