Yagyu Chronicles 1: Secret Scrolls (1961)

Two groups are after the legendary Yagyu Secret Scrolls. A princess of a disgraced clan and her loyal servant want it to clear their family's name. And a rival clan wants it to destroy the Yagyu family. Only master swordsman, Yagyu Jubei stands in their way. What is the secret that is hidden away in the scrolls?