Black River (黒い河 Kuroi kawa?) is a 1957 Japanese film directed by Masaki Kobayashi.
The story follows a university student who moves into an apartment building and becomes involved with a waitress. The landlord then attempts to evict the tenants and sell the building through illicit means. The film was screened at the 2005 New York Film Festival in a theatrical retrospective celebrating the Shochiku Company's 110th year.
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http://mubi.com/topics/directors-cup-film-analysis-black-river-1957-dir-masaki-kobayashi

“In any era, I am critical of authoritarian power.” – Masaki Kobayashi
Very few figures in cinema during WWII were as delicate and, at the same time, profoundly expressive as Masaki Kobayashi. As a director, the portrayal and apparent exposé of his country’s atrocities formed Kobayashi’s reputation as an undisguised manifestation of integrity and brutal honesty. His films exist not only serve as reminders but as unyielding indicators to the forces of human capability. Moving towards this grand idea of ultimate, unbiased perception, his work gradually matured and progressed; displaying a more aggressive focus on clarity amidst his fiction as time went on.
With Black River, this vision is pronounced rather acutely through a unique look at a certain post-war US Air-Naval base in Japan. The coexisting lives of the G.I.’s and Japanese heightened the intensity of life during a difficult transition after the war. The atmosphere is heated, both metaphorically and literally, as a singular motif—an umbrella—establishes both mood and theme. The symbolic nature of the film is that of security and comfort, or lack thereof, and; as the core characters seek shelter from the hurricane of gang violence, economic troubles and forlorn yet irresistible love, they are unable to do so, and so must linger—surrounded—with no protection to shield them from the storm. This adversity will lead to Kobayashi’s status as one of the most imperative filmmakers in Japanese cinema.