Miyamoto Musashi: Nitôryû kaigen

The movie opens with Musashi visiting the Yagyu clan to seek instruction from the Great Lord Sekishusai, a renowned master strategist and swordsman. It turns out that Sekishusai is mighty difficult to get an audience with, denying all requests for matches. By one of the many astounding coincidences to be found in the Eiji Yoshikawa tale, Otsu has ended up working as Sekishusai's personal assistant. (lardbiscuit.com)