Introduction: Oishi Shinkage-ryū kenjutsu (大石神影流剣術) originated in the Yanagawa-han (柳河藩) during the late Edo Period, spreading throughout southern Japan based on the notoriety of its founder, Oishi Susumu Tanetsugu (大石進種次), and his son, Oishi Susumu Tanemasa (大石進 種昌). Both won many shiai (試合) duels and became famous for these taryū-jiai (他流試合) matches against swordsmen of other schools and domains. The exact date of the founding of Oishi Shinkage-ryū is unclear, but mokuroku