Isshin Tasuke: A World in Danger (1958)

Original title: 一心太助　天下の一大事

Tasuke stumbles across Kokichi, a distraught man whom having lost his fiancee to Lord Kawakatsu is ready to commit suicide. Tasuke learns that Kokichi's fiancee, Otoyo, was a chambermaid whom Kawakatsu abducted in order to make her his concubine and Tasuke feels compelled to right this wrong. Meanwhile Kawakatsu is dealing in black-market lumber and receiving kick-backs but unbeknownst to him he is under investigation by Lord Izu, one of the Shogun Elders. Will Tasuke be able to rescue Otoyo from the clutches of Lord Kawakatsu and can Lord Izu put an end to his money hungry evildoings.