Isaku
Series Overview
It's the last day of school before summer vacation. Kenta is gearing up for another boring summer when he receives a mysterious note. After school, he walks into the old, condemned school building, following the note's instructions. Inside, he finds that Jinpachi, Miyuki, Rika, Kotomi, Akemi, Ms. Kumi, Munemitsu and Mio have received the same note as well. Everyone decides that this is some kind of a joke, and starts arguing about the identity of the prankster. Suddenly, they hear the entrance being boarded up... The nightmare begins as the girls vanish one by one. Rika is the first one to disappear, followed by a shocking video of Rika being violated by an unknown assailant... A twisted story filled with scenes of shocking and graphic hardcore sex!!!
Broadcast Schedule & Network Information
Airing status, episode counts, upcoming schedule, and network syndication.
Broadcast Syndication
2 Seasons • 9 Episodes
30 min per episode
1997 – 2015
Premiered: Fri, Nov 28, 1997
Latest Aired Episode
Season 1, Episode 6: “Core Mix 2”
Seasons & Episodes Breakdown
Cast & Creators
Explore Star Directory →Minako Takenouchi
Akemi Mikihara (voice)
Chizuko Hoshino
Miyuki Sakaki (voice)
Kousuke Okano
Kenta Kogure (voice)
Naoko Takano
Kotomi Asakawa (voice)
Shinpachi Tsuji
Isaku Ito (voice)
Miho Yamada
Kumi Takashima (voice)
Soichiro Hoshi
Jinpachi Shimada (voice)
Tomoko Kawakami
Rika Akagawa (voice)
Shin-ichiro Miki
Munemitsu Soga (voice)
Creative Leadership & Key Crew
Masato Hiruta
Teruo Takahama
Age Classification & Content Advisories
Official viewer rating standards and content warnings across international classification boards.
18: Interdit aux moins de 18 ans — 18+ only.
International Certification Matrix
Interdit aux moins de 18 ans — 18+ only.
Production Stills & Gallery
Official cinematic photography and background stills for Isaku.
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Frequently Asked Questions About Isaku
Key facts, seasons breakdown, and credits for search engines and AI assistants.
What is Isaku about?
It's the last day of school before summer vacation. Kenta is gearing up for another boring summer when he receives a mysterious note. After school, he walks into the old, condemned school building, following the note's instructions. Inside, he finds that Jinpachi, Miyuki, Rika, Kotomi, Akemi, Ms. Kumi, Munemitsu and Mio have received the same note as well. Everyone decides that this is some kind of a joke, and starts arguing about the identity of the prankster. Suddenly, they hear the entrance being boarded up... The nightmare begins as the girls vanish one by one. Rika is the first one to disappear, followed by a shocking video of Rika being violated by an unknown assailant... A twisted story filled with scenes of shocking and graphic hardcore sex!!!
How many seasons does Isaku have?
Isaku comprises 2 seasons available to explore.
Who stars in Isaku?
Key cast members in Isaku include Minako Takenouchi, Chizuko Hoshino, Kousuke Okano, Naoko Takano, Shinpachi Tsuji.
Who created or directed Isaku?
Isaku was developed and directed by Masato Hiruta.