A Page of Madness
Starring Masuo Inoue, Ayako Iijima, Yoshie Nakagawa, Eiko Minami, Misao Seki, Minoru Takase, Hiroshi Nemoto, Kyosuke Takamatsu, Tetsu Tsuboi, Shintarô Takiguchi
It's a drama and horror movie, and has a rating of 7.4 out of 10 from Imdb which is usually fine for this kind of movie.
Watch it here
Not found streaming from Austria.