Hachiko Monogatari
ハチ公物語 (original)
The tragic, true story about Hachikō, an Akita dog who was loyal to his master, Professor Ueno, even after Ueno's death.
Starring Tatsuya Nakadai, Kaoru Yachigusa, Mako Ishino, Masumi Harukawa, Taiji Tonoyama, Yoshi Katō, Shigeru Izumiya, Kei Yamamoto, Kumeko Urabe, Chōei Takahashi
It's a drama and family 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 United States.