Is Human Specimens coming back?

Human Specimens ended on December 18, 2025, after its single season. The series was available on Prime Video and concluded its story within that timeframe.

Human Specimens was a drama, thriller, and mystery series that premiered in December 2025. It was based on the novel by Kanae Minato, a renowned Japanese mystery writer. The show followed Professor Shirô Sakaki, a butterfly researcher who confessed to turning six young boys, including his own son Itaru, into "human specimens." The narrative explored dark themes and psychological tension as the story unfolded.

The cast included Hidetoshi Nishijima as Professor Shirô Sakaki, Somegorô Ichikawa as Itaru Sakaki, Rie Miyazawa as Rumi Ichinose, and Aoi Itô as Anna Ichinose.