Patlabor: The Movie (機動警察パトレイバー the Movie) – Mamoru Oshii

Patlabor: The Movie (機動警察パトレイバー the Movie) is a real robot detective movie directed by Mamoru Oshii in 1989.
See the fact sheet here : http://www.fantastique-arts.com/en/nb3031-movie-patlabor-the-movie.html