Well, let's see. A few that come to mind are: Mizoguchi's The Story of the Late Chrysanthemums (1939, I believe -- and I'm sure you've seen it) and The 47 Ronin (1941); Naruse's The Song Lantern (1943); Ozu's The Brothers and Sisters of the Toda Family (1941) and There was a father (1942); a couple from Italian neorealists ; Eisenstein's Ivan (1944)... etc.