Pinku from 1965.

Misawa Ihei (Nagato) is traveling with his wife Tae (Iwashita Shima) who abhors the practice of sword fighting for prize money. Tae is the daughter of the clan's chief counselor who married the low-ranking Ihei to avoid becoming the clan lord's mistress. Into the mix comes Oba Gunjuro (Tetsurō Tamba), a mysterious ronin who will do anything for money. This leads to a fitting climax as the forces of hate and love converge while the couple attempt to break through the border!