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The story begins in New York in 1971, where W. Eugene Smith (Johnny Depp) lives as a broken recluse, drowning in debt and battling alcoholism alongside past trauma from his days as a World War II photographer. His life begins to shift when he is approached by Aileen Mioko Smith (Minami), a young Japanese-American translator and activist who invites him to travel to the coastal city of Minamata in Kumamoto Prefecture, Japan. There, thousands of residents suffer from neurological paralysis, blindness, and severe birth defects caused by hazardous mercury wastewater deliberately dumped into the sea by the chemical giant Chisso Corporation.
Initially reluctant, Eugene finally agrees to travel to Japan after convincing Life magazine editor Robert Hayes (Bill Nighy) to fund the investigative assignment. Upon arriving in Minamata, Eugene is met with suspicion from locals as well as brutal intimidation from the corporation, which attempts to cover up its environmental crimes through bribes and physical violence. Through patience and genuine empathy, Eugene gradually earns the trust of the victims—most notably the family of Mitsuo Yamazaki (Hiroyuki Sanada)—to document their suffering for the entire world to see.
The film's greatest strength rests on Johnny Depp's authoritative, fragile, yet fiercely determined performance. Sporting graying hair, a thick beard, and heavy-rimmed glasses, Depp disappears completely into the character of Eugene Smith, who appears cynical on the surface yet harbors extraordinary sensitivity behind his camera lens. Eugene's emotional transition from an angry man alienated from society into a figure willing to risk his life to amplify the voices of the marginalized is executed convincingly without ever feeling melodramatic.
Beyond Depp's performance, the Japanese supporting cast infuses the entire narrative with an authentic spirit of humanity. Hiroyuki Sanada shines as Mitsuo Yamazaki, a local protest leader torn between despair and unwavering resolve for the sake of their children's future. Meanwhile, Minami as Aileen Mioko Smith serves as a crucial emotional counterbalance, illustrating a growing partnership and romance forged under the constant threat of life-threatening danger.
In terms of aesthetics and cinematography, Minamata presents a poetic visual approach firmly rooted in gritty documentary realism. Cinematographer Benoît Delhomme utilizes a muted gray color palette and dim darkroom lighting to mirror both Eugene's inner state and the gloomy atmosphere of a poisoned town. The scene in which Eugene develops the iconic photograph Tomoko and Mother in the Bath inside the darkroom stands as one of the most powerful and heartbreaking cinematic moments, bringing the history of photojournalism to life right before the audience's eyes.
The musical score, composed by the late legendary Ryuichi Sakamoto, enriches the film's emotional dimension extraordinarily well. Soft, minimalist piano notes blend with melancholic orchestral melodies to accompany every scene of tragedy and civic resistance without ever feeling overly manipulative. Sakamoto's music grants a sacred, quiet space for the victims' faces to speak for themselves through Eugene Smith's black-and-white portraits.
However, in terms of storytelling structure, some critics noted that the plot still follows a fairly conventional "Western savior" drama formula, where the long-term struggles of local activists are occasionally overshadowed by the protagonist's personal conflicts. Several antagonists from the Chisso Corporation are also depicted somewhat one-dimensionally as villainous figures lacking deeper nuance. Overall, despite its classical narrative approach, Minamata remains an important, conscience-stirring piece of cinema showcasing one of Johnny Depp's finest acting performances in the past decade.