A few more "important" foreign films of the 40s:

The 47 Ronin - Mizoguchi 
Day of Wrath - Dreyer 
Ivan the Terrible, Part 1 - Eisenstein
Spring in a Small Town - Fei
Late Spring - Ozu 
Germany Year Zero - Rossellini 
Le Silence de la Mer - Melville
The Brothers and Sisters of the Toda Family - Ozu