The Quiet Duel
静かなる決闘 (original)
Toshirō Mifune plays a young idealistic doctor who works at his father's (Takashi Shimura) clinic in a small and seedy district. During the war, he contracts syphilis from the blood of a patient when he cuts himself during an operation. Treating himself in secret and tormented by his conscience, he rejects his heartbroken fiancée without explanation.
Starring Toshirō Mifune, Miki Sanjo, Takashi Shimura, Kenjiro Uemura, Isamu Yamaguchi, Noriko Sengoku, Chieko Nakakita, Kenichi Miyajima, Masatoki Sasaki, Seiji Izumi
It's a drama movie, and has a rating of 7.4 out of 10 from Imdb which is usually fine for this kind of movie.
Watch it here
Not found streaming from United States.