Series

Watch Human Specimens (2025) Online

6.24 votes2025EndedDramaMysteryCrimeOfficial site

Synopsis

Professor Shiro Sakaki, a butterfly researcher, confesses to turning six young boys, including his own son Itaru, into "human specimens."

Episodes

Miniseries

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1. Episode 1Now viewing2025-12-1956m6.0The bodies of young boys were found in six cases. Shiro Sakaki, a professor considered Japan's leading expert on butterflies, turns himself in. He has recorded everything in a report published on the Internet, from his motive to the process of his creation. The interrogation proceeds as if tracing his distorted record, leading to a sensational suspense story where beauty and madness intertwine.
2. Episode 22025-12-1946m6.0Shiro starts to express his artistic viewpoint during interrogation. The art camp is canceled when Rumi falls ill. Shiro goes to the mountain to take the boys home. In the warehouse, there are six cases on display. Shiro feels emotional upheaval due to his expectations toward Itaru. As the detective investigates further, a big mystery arises, and the interrogation gets to the crux of his story.
3. Episode 32025-12-1947m6.0After creating five specimens, Shiro's final target is his beloved son, Itaru. Despite the memories with Itaru, Shiro only sees his son as a butterfly. Shiro makes up his mind to create his last specimen. At last, the report named "Human Specimen by Shiro Sakaki" seems to have ended. However, the letters in the report start to get distorted, and the story shifts to a new perspective.
4. Episode 42025-12-1946m6.0Itaru stays home while Shiro leaves for an observation survey of butterflies. Itaru stares at his father's specimens and invites his friends over. He starts recording his observations in his own report. When Shiro returns, they have dinner and share memories. Shiro opens his son's computer with a strange feeling about the specimens in his room.Three years later, Shiro receives a letter from Anna.
5. Episode 52025-12-191h 3m7.0Anna seemed proud, but she longed for a successor while looking at her mother, in the spotlight for her art book. After the art camp is canceled, Anna invites the boys to the mountain house. She insists she made the Human Specimen. Shiro understands Itaru's hopes to become his father's specimen. The truth of Itaru's death and the mystery of Anna's confession will be unraveled.

Cast

Top Billed Cast

Hidetoshi Nishijima
Professor Shiro Sakaki
Somegoro Ichikawa
Itaru Sakaki
Rie Miyazawa
Rumi Ichinose
Aoi Ito
Anna Ichinose
Towa Araki
Toru Shirase
Jyutaro Yamanaka
Hikaru Akabane
Kodai Kurosaki
Sho Ishioka
Leo Matsumoto
Ao Fukazawa
Ikuho Akiya
Dai Kuroiwa

Availability

Where To Watch Legally

Stream

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FAQ

Frequently Asked Questions

Is Human Specimens available to watch online?

Yes - see the "Where to watch legally" section on this page for streaming, rental and purchase options.

How many seasons does Human Specimens have?

Human Specimens has 1 season and 5 episodes.

When did Human Specimens first air?

Human Specimens first aired in 2025.

Is Human Specimens still running?

Human Specimens's status on TMDB is: Ended.

What genre is Human Specimens?

Human Specimens is classified as Drama, Mystery, Crime.