8.1

Human Specimens•Season 1•Episode 1

Episode 1

8.1/10 · 9 votesDec 19, 202556 min

Ranked #1 of 5 in Season 1•+0.4 vs season avg

Discussion

The 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

Directed byRyuichi Hiroki

Next episodeE2 · Episode 2

Seasons1

All 1

Season 1 Episodes5

Episode 1

Episode 2

Episode 3

Episode 4

Episode 5

Cast9

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

Crew2

Ryuichi Hiroki

Director

Nami Kikkawa

Screenplay

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Episode Summary

"Episode 1" is episode 1 of Human Specimens season 1. It scored 8.1/10 from 9 votes, ranking #1 of 5 episodes this season (season average 7.7). Directed by Ryuichi Hiroki, it aired on December 19, 2025.

Next: E2 · Episode 2 Best of Season 1