Stray Dog (Nora Inu) is an Akira Kurosawa film of 1949. It tells the story of rookie homicide detective Murakami looking for his gun, that was stolen from him on a bus. He’s helped by detective Sato, a more experienced detective, in his search. Murakami, however, constantly feels guilty because the gun has been used to commit crimes. One of the first films to deal with the “older detective trains younger detective” plot you can see in films like Se7en or Training Day. No relation with the anime.