Samurai Rebellion aka Jôi-uchi: Hairyô tsuma shimatsu (1967)
Isaburo Sasahara: Each must live his own life.
A slow-burner of a film with such a wonderous reward for the time invested in viewing this film by Masaki Kobayashi.
Starring Toshirô Mifune, who, for me, can do no wrong. The calm waters that scarcely conceals the turbulence beneath have continuously amazed and captivated me every single time I've seen him. He plays Isaburo Sasahara, an aged samurai who has spent his life as a henpecked husband preserving the standing of the family he had been chosen to be married into.
So, when he sees that the eldest of his two sons would be put into a very similar position when their lord insists that he marries his mistress, Ichi (Yôko Tsukasa) who, even though she had just born him a son, has fallen out of his favor; Isaburo is more than just a little hesitant.

Against everyone's expectations, especially Ichi and her assigned husband, Yogoro (Gô Katô), the two fall very much in love and are gifted with a baby girl within the first two years of marriage.
But, when the lord's first son dies, he demands that Ichi return to be the now new heir's mother.
Ichi does not want to return. Nor does Yogoro wish to part with her. To the agitation of their self-preserving family clan. The only one on their side is Isaburo as the chess match of diplomatic formalities, codes of honor, and, above all, what is truly right, escalate to the inevitable bloodshed.
A beautifully told story. The measured telling drew me in with such sublime subtlety I had no idea just how captivated I was until the third act as the two lovers, especially Ichi, remained resolute in the face of such insurmountable odds. Her poetic nobility causing a loud cheer to bubble out of me.
To the one who chose this, f@ckin
Dōmo arigatō!!