Floating Weeds
浮草 (original)
A troupe of travelling players arrive at a small seaport in the south of Japan. Komajuro Arashi, the aging master of the troupe, goes to visit his old flame Oyoshi and their son Kiyoshi, even though Kiyoshi believes Komajuro is his uncle. The leading actress Sumiko is jealous and so, in order to humiliate the master, persuades the younger actress Kayo to seduce Kiyoshi.
Starring Ganjirô Nakamura II, Machiko Kyō, Hiroshi Kawaguchi, Ayako Wakao, Haruko Sugimura, Chishū Ryū, Kōji Mitsui, Haruo Tanaka, Kumeko Urabe, Toyo Takahashi
Watch "Floating Weeds" from streaming services HBO Max, Criterion Channel, Kanopy released in 1959. It's a drama and romance movie, and has a rating of 7.9 out of 10 from Imdb which is usually fine for this kind of movie.