@vonny,
Hachi: A Dog's Tale--a film directed by Lasse Hallstrom, one of my favorite directors..
spoiler alert!
Starring Richard Gere who goes to a train station everyday and commutes to his work. He finds a stray Akita pup and adopts him. The dog then follows him to the train station everyday and waits for his return in the evening. One day the Richard Gere character has a heart attack at work and dies. The faithful Akita dog remains at the train station waiting for his master to return. The dog remains there for years for the rest of his life. Kindly people feed him.
This was based on a true story in Japan. Although I think Lasse Hallstrom is a great, director, this is his weakest effort and actually quite boring.