Unnatural: A TBS & Netflix Review of Forensic Science in Japan

Originally aired on TBS in 2018 and now available globally on Netflix, Unnatural (アンナチュラル) stands as one of Japan’s most acclaimed forensic dramas of the decade.

Set in the Unnatural Death Investigation (UDI) Laboratory, the story follows Dr. Mikoto Misumi, a passionate forensic pathologist who searches for truth in every unexplained death. Each episode exposes the emotional and moral layers behind mortality — from accidents and suicides to hidden murders — while showcasing the meticulous craft of forensic investigation.

Though it’s structured like a procedural, the show’s strength lies in its heart: every autopsy tells a story of justice, empathy, and humanity.

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⚖️ Forensic Reality vs. Fiction in Japan

While Unnatural portrays a cutting-edge forensic lab with state-of-the-art technology and a dynamic multidisciplinary team, real Japanese forensic practice paints a more restrained picture.

In Japan, forensic autopsies occur in less than 12% of unnatural deaths, compared to over 50% in many Western nations. As of 2024, there are around 170 active forensic pathologists nationwide — meaning one expert often handles hundreds of cases yearly.
Most investigations fall under the police’s jurisdiction, with forensic specialists focusing strictly on medical examination and cause-of-death determination.

The drama’s UDI lab — independent, well-funded, and emotionally invested in each case — remains fictional, but it draws inspiration from the government’s push since 2012 to improve death-investigation accuracy. In reality, forensic centers like those at Tokyo Medical Examiner’s Office and Osaka University handle thousands of cases with limited staff and time, making the drama’s freedom and depth a hopeful exaggeration of Japan’s forensic potential.

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👩‍🔬 Main Cast

Ishihara Satomi as Dr. Mikoto Misumi

Known for her warmth and sharp intellect, Ishihara embodies a forensic doctor who balances empathy with precision. Her portrayal brings depth to a profession often seen as clinical. Ishihara began her career in the early 2000s, earning acclaim for Shitsuren Chocolatier and Rich Man, Poor Woman. In Unnatural, she delivers one of her most emotionally grounded performances.

Iura Arata as Dr. Kai Nakado

A veteran of Japan’s avant-garde film scene, Iura plays a complex senior pathologist whose calm logic contrasts Mikoto’s passion. Formerly known as Arata, his performances in After Life and Ping Pong established him as a master of subtle expression. His stoic yet humane approach perfectly mirrors the ethical precision of real forensic doctors.

Kubota Masataka as Rokuro Kube

Kubota shines as the young, curious assistant, bridging science with humor. Rising to fame with Death Note (2015) and Tokyo Ghoul, Kubota adds vulnerability to the investigative tone. His character represents the bridge between theory and empathy — a vital quality in modern forensic teams.

Mikako Ichikawa as Yuko Shoji

Her portrayal of the analytical researcher gives balance to the emotional dynamics within the UDI lab. Mikako Ichikawa, celebrated for Memories of Matsuko and Guilty Flag, captures the meticulous mindset required in Japan’s forensic science, where accuracy and discretion define every report.

Yutaka Matsushige as Director Yasuo Kamikura

As the pragmatic leader of UDI, Matsushige grounds the story in realism. Known for Kodoku no Gurume and Midnight Diner, his presence lends quiet authority. He embodies the experienced professional struggling between bureaucratic limits and the pursuit of scientific truth.

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🎭 Overall Performance

Unnatural is a rare example of a Japanese procedural that fuses entertainment with authenticity. Every autopsy scene is crafted with real medical logic — from tissue examination to toxicology — while still conveying emotional storytelling.
Though dramatized for television, it shines light on the challenges of forensic science in Japan, inspiring respect for the professionals behind real laboratories who work tirelessly, often without recognition.

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🎵 Jdramatastic Emoji Ranking

🎵 Storyline: 9/10 – Emotionally layered and tightly structured
🎸 Acting: 10/10 – Outstanding ensemble; Ishihara Satomi leads flawlessly
📺 Cinematography: 9/10 – Sharp visuals echoing forensic realism
🌟 Realism: 8.5/10 – Highly accurate, slightly dramatized
🔥 Impact: 9/10 – Quietly powerful without exaggeration
❤️ Emotional Depth: 8.5/10 – Subtle but heartfelt in every episode
💀 Crime Elements: 9/10 – Logical, precise, true to Japanese forensic tone
🧬 Authenticity: 9/10 – Faithful to Japan’s forensic system challenges

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🎭 Overall Performance: ★★★★☆ (4.5/5)
Unnatural transforms scientific investigation into heartfelt storytelling — a blend of reason and emotion that lingers long after the screen fades to black.