The Idiot
白痴 (original)
In post-World War II Japan, childlike veteran Kinji suffers from post-traumatic stress-induced seizures, and, after treatment at a mental health institution in Okinawa, he returns to his hometown. There he meets and becomes romantically caught up with two women -- Taeko and Ayako. Another man, Denkichi, is passionately in love with Taeko, too. So when Kinji begins favoring Taeko, a violent conflict erupts between the two men.
Starring Setsuko Hara, Masayuki Mori, Toshiro Mifune, Toshirō Mifune, Yoshiko Kuga, Takashi Shimura, Chieko Higashiyama, Eijirō Yanagi, Minoru Chiaki, Noriko Sengoku
It's a drama and romance movie, and has a rating of 7.2 out of 10 from Imdb which is usually fine for this kind of movie.
Watch it here
Not found streaming from Finland.