Fires on the Plain
野火 (original)
Starring Eiji Funakoshi, Osamu Takizawa, Mickey Curtis, Mantarō Ushio, Kyū Sazanka, Yoshihiro Hamaguchi, Hikaru Hoshi, Masaya Tsukida, Kô Sugita, Tatsuya Ishiguro
It's a drama and war movie, and has a rating of 8 out of 10 from Imdb which is usually fine for this kind of movie.
Watch it here
Not found streaming from Italy.