Quill

As a labrador puppy, Quill is sent to live with a couple, Isamu (Teruyuki Kagawa) and Mitsuko Nii (Shinobu Terajima), who work as volunteers, training guide dogs (seeing eye dogs). When he grows to an adult dog, he is taken to a guide dog school, by a friendly, yet firm trainer Satoru Tawada... (imdb)