Nemuri Kyôshirô: Joyôken (1964)

This film of the sleepy-eyed ronin series has the quite reluctant hero refuse to come to the assistance of a Japanese Christian in an age of both proselytizing and persecution, but later come around and render the services of his sword following a series of events, with the involvement of a malevolent princess, that lay to bare hypocrisy in many forms.