Children of Hiroshima
Starring Nobuko Otowa, Osamu Takizawa, Masao Shimizu, Jūkichi Uno, Akira Yamanouchi, Jun Tatara, Tsutomu Shimomoto, Hideji Ōtaki, Eiken Shoji, Shinsuke Ashida
It's a drama and war movie, and has a rating of 7.6 out of 10 from Imdb which is usually fine for this kind of movie.
Watch it here
Not found streaming from Italy.