
Born in Gifu Prefecture, Koyama attended Nihon University but quit midway to join the independent production company Kindai Eiga Kyokai, where he worked as an assistant director under such directors as Kaneto Shindō, Kozaburo Yoshimura, and Tadashi Imai. He made his directorial debut in 1971 with thechildren's film Koi no iru mura. His second film, Futatsu no hāmonika (1976), earned him a New Directors Citation from the Directors Guild of Japan. His 1983 film Hometown was entered into the 13th Moscow International Film Festival. His 1987 film, Hachiko Monogatari, about the faithful dog Hachiko, was the top Japanese film at the box office that year. He is known for his humanistic perspective.
2024Shinpei: Uta Koso SubeteMovieDirector · Writer
2014Until the Day ComesMovieDirector
2008The Last Game: Waseda vs. KeioMovieDirector
2004Kusa no ranMovieDirector
2001A Single Drop of Water in a Mighty RiverMovieDirector
1996The Life and Love of Kenji MiyazawaMovieDirector
1996Maya no IsshouMovieScreenplay · Director
1995Mitabi no kaikyôMovieDirector · Screenplay
1995Himeyuri no ToMovieDirector · Screenplay
1994SakuraMovieDirector
1993Summer of the Moonlight SonataMovieDirector
1992Faraway SunsetMovieDirector
1990The Pale HandMovieDirector
1990Don't MindMovieDirector
1990Anne of Green Gables: Road to Green GablesMovieWriter
1989Isewan Taifuu MonogatariMovieDirector · Writer
1989Thousand CranesMovieScreenplay · Director · Producer
1987HachikoMovieDirector
1985Boku-chan no senjōMovieProducer
1983HometownMovieDirector · Producer · Screenplay
1981Fifth MovementMovieDirector · Writer
1979Anne of Green GablesTV showWriter · 13 episodes
1977Tomorrow EveningMovieScreenplay · Director
1977Mount HakkodaMovieAssistant Director
1976Two HarmonicasMovieDirector
1969Heat Wave IslandMovieAssistant Director