Inori
Starring Sakae Hukui, Tetsuo Yanase, Shigehumi Kotani, Noriko Ikeo, Ryo Ikeo, Yoshinisa Matsuba, Toshiko Matsuba, Tametoshi Iba, Machiko Iba, Okei Mori
It's a documentary and drama movie, and has a rating of 6.9 out of 10 from Imdb which is usually fine for this kind of movie.
Watch it here
Not found streaming from Austria.