Shirayuki sensei to kodomo tachi (1950)

Overview

The film centers a compassionate teacher (Setsuko Hara) who teaches at a Tokyo grade school where students curse and gamble. The school has a pond on-premises that she's in charge of and cares for. The pond holds a number of carp, but someone is snatching them. The teacher forms a special bond with a child who lives in abject poverty.