Mike Smith
All five episodes of Human Specimens will be available to stream worldwide on Prime Video starting December 19, 2025, across more than 240 countries and territories.
Human Specimens Synopsis
Human Specimens is a 2025 TV series that explores a psychological mystery centered on a respected academic whose confession exposes an unthinkable crime.
Originally titled Ningen Hyôhon, the series is adapted from the novel by celebrated Japanese author Kanae Minato. The story follows Professor Shirô Sakaki, a quiet butterfly researcher who shocks the nation by admitting that he turned six young boys, including his own son, into so called human specimens. As investigators, families, and survivors grapple with the revelation, the narrative unfolds through multiple perspectives, gradually revealing the emotional manipulation, moral justifications, and fractured relationships that allowed the crimes to remain hidden. The series examines obsession, control, and the disturbing line between scientific curiosity and dehumanization, while placing a strong emotional focus on the father son bond and the long term psychological damage inflicted on the children involved.
When Does Human Specimens Premiere?
Human Specimens premieres on December 19, 2025, with all five episodes released on Prime Video for streaming worldwide.
Where to Watch Human Specimens in the US
In the United States, viewers can watch Human Specimens exclusively on Prime Video, where all episodes are available to stream on demand.
Where to Watch Human Specimens in Canada
Canadian audiences can stream Human Specimens on Prime Video. Once logged in with an active subscription, the series can be watched online or through the Prime Video app across supported devices.
Where to Watch Human Specimens in the UK
In the UK, Human Specimens is available to stream through Prime Video. The psychological drama can be watched at any time via the Prime Video website or app.
Where to Watch Human Specimens in Australia
Australian viewers can watch Human Specimens on Prime Video, where the complete miniseries is available nationwide. The show streams in high quality and supports on demand viewing across multiple platforms.
Human Specimens Episodes
The series consists of five episodes:
- Episode 1 – Premiere date: December 19 2025
The confession of Professor Shirô Sakaki sends shockwaves through society as authorities begin to uncover the scope of his crimes. - Episode 2 – Premiere date: December 19, 2025
- Episode 3 – Premiere date: December 19, 2025
- Episode 4 – Premiere date: December 19, 2025
- Episode 5 – Premiere date: December 19, 2025
Human Specimens (2025) Cast
Here’s the cast list:
| Name | Role |
|---|---|
| Hidetoshi Nishijima | Professor Shirô Sakaki |
| Ichikawa Somegorō VIII | Itaru Sakaki |
| Rie Miyazawa | Rumi Ichinose |
| Aoi Ito | Anna Ichinose |
| Towa Araki | Toru Shirase |
| Jyutaro Yamanaka | Hikaru Akabane |
| Kurosaki Kodai | Sho Ishioka |
| Leo Matsumoto | Ao Fukazawa |
| Ikuho Akiya | Dai Kuroiwa |
On What Devices Can You Watch Prime Video?
Prime Video supports streaming across a wide range of devices, making Human Specimens easy to watch at home or on the go.
| Device Category | Supported Devices |
|---|---|
| Smart TVs | Samsung Smart TV, LG Smart TV, Android TV |
| Streaming Devices | Amazon Fire TV, Roku, Apple TV, Chromecast |
| Game Consoles | PlayStation, Xbox |
| Mobile Devices | iOS phones and tablets, Android phones and tablets |
| Computers | Web browsers on Windows and macOS |
Can You Watch Human Specimens Online for Free?
Yes. Human Specimens can be watched for free during a Prime Video free trial, where available. New subscribers can stream the entire series during the trial period before a paid subscription is required.
Is Human Specimens Series Suitable for All Ages?
Human Specimens is intended for mature audiences. The series contains disturbing themes, psychological trauma, and intense emotional material, making it unsuitable for children and younger viewers.
Where Can I Download Human Specimens Season 1 Episodes?
Human Specimens episodes can be legally downloaded through the Prime Video app for offline viewing. Downloads are available to subscribers on supported mobile devices and tablets for temporary offline access.
FAQs
Who created Human Specimens?
The series is created by Kanae Minato, the acclaimed Japanese author known for her psychological mystery novels.
Is Human Specimens based on a true story?
No, the series is a fictional adaptation of a novel, though its themes are grounded in realistic psychological and social issues.
Who directed Human Specimens?
The series is directed by Ryûichi Hiroki, known for his work in emotionally intense and character driven dramas.
What genre does Human Specimens belong to?
Human Specimens blends psychological drama, mystery, and thriller elements, with a strong focus on human behavior and moral conflict.
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