Abandon the Old in Tokyo(1970)

Tokyo Ubasuteyama

Kenichi Nakamura, a garbage hauler, takes care of his bedridden and guilt-inducing mother. Because his fiancee wants to see his apartment the next time they are together, Kenichi finds a separate apartment for his mother. He takes his fiancee on a trip but abandons her in the train, returning to his mother's apartment only to find that she overdosed using Brovarin.