The Decagon House Murders

The Decagon House Murders

十角館の殺人
Ended First aired 22/Mar/2024 Japan Japanese 1 season(s) 5 episode(s)
Mystery
The drama tells the story of a group of seven university students who travel to a deserted island where a strange decagonal mansion stands. It was the scene of a grisly mass murder six months earlier, and events soon turn ominous.
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TimeScore 33% Skip It
Binge Meter 48% Slow Burn
Episode Pulse Quiet 40% activity score
Drop Rate 0% Very Low

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Seasons & Episodes

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Season 1 · Season 1
5 episode(s) · Air date: 22/Mar/2024
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Season Overview

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S1E5
Episode 5
Air date: 22/Mar/2024 · Runtime: 49 min
Summary

As the situation at the Decagon House grows more serious, Konan learns the shocking details of the incident from the police. Devastated by the deaths of his friends, he considers stepping away from the case, but ultimately resolves to continue the investigation and reveal his final theory.

Summary

As the situation at the Decagon House grows more serious, Konan learns the shocking details of the incident from the police. Devastated by the deaths of his friends, he considers stepping away from the case, but ultimately resolves to continue the investigation and reveal his final theory.

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S1E4
Episode 4
Air date: 22/Mar/2024 · Runtime: 46 min
Summary

Reviewing the clues they have gathered, Konan and Shimada develop a new hypothesis that could explain the tragedy at Aoyashiki. Determined to uncover the truth, they decide to travel to Tsunoshima Island themselves.

Summary

Reviewing the clues they have gathered, Konan and Shimada develop a new hypothesis that could explain the tragedy at Aoyashiki. Determined to uncover the truth, they decide to travel to Tsunoshima Island themselves.

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S1E3
Episode 3
Air date: 22/Mar/2024 · Runtime: 48 min
Summary

Konan and Shimada continue their investigation but struggle to uncover any solid leads. While they question whether the mysterious letter might have been a prank, a terrifying incident unfolds at the Decagon House.

Summary

Konan and Shimada continue their investigation but struggle to uncover any solid leads. While they question whether the mysterious letter might have been a prank, a terrifying incident unfolds at the Decagon House.

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S1E2
Episode 2
Air date: 22/Mar/2024 · Runtime: 44 min
Summary

During a training camp at the Decagon House on Tsunoshima Island, a member of the Mystery Research Club is murdered. As suspicion spreads among the isolated group, Konan and Shimada search for clues related to the earlier Aoyashiki incident.

Summary

During a training camp at the Decagon House on Tsunoshima Island, a member of the Mystery Research Club is murdered. As suspicion spreads among the isolated group, Konan and Shimada search for clues related to the earlier Aoyashiki incident.

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S1E1
Episode 1
Air date: 22/Mar/2024 · Runtime: 53 min
Summary

Konan Takaaki, a former member of K University’s Mystery Research Club, receives a mysterious letter from Nakamura Seiji. Determined to uncover the truth, he visits Seiji’s younger brother and meets Shimada Kiyoshi, who soon joins him in investigating the mystery.

Summary

Konan Takaaki, a former member of K University’s Mystery Research Club, receives a mysterious letter from Nakamura Seiji. Determined to uncover the truth, he visits Seiji’s younger brother and meets Shimada Kiyoshi, who soon joins him in investigating the mystery.

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Cast

Main cast members.

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Tomoya Oku
Tomoya Oku
Takaaki Kawaminami
Munetaka Aoki
Munetaka Aoki
Kiyoshi Shimada
Akihiro Kakuta
Akihiro Kakuta
Koujiro Nakamura
Toru Nakamura
Toru Nakamura
Seiji Nakamura
Ayumu Mochizuki
Ayumu Mochizuki
"Ellery"
Neru Nagahama
Neru Nagahama
"Agatha"
Yuki Imai
Yuki Imai
"Leroux"
Kosuke Suzuki
Kosuke Suzuki
"Poe"
Reia Yonekura
Reia Yonekura
"Orczy"
Rukiya
Rukiya
"Carr"
Hiroto Kobayashi
Hiroto Kobayashi
Kyoichi Morisu
Asumi Kikuchi
Asumi Kikuchi
Chiori Nakamura
Mari Hamada
Mari Hamada
Kuniko Matsumoto
Tamiyo Kusakari
Tamiyo Kusakari
Masako Yoshikawa
Yasuyuki Maekawa
Yasuyuki Maekawa
Seiichi Yoshikawa
Aoba Kawai
Aoba Kawai
Kazue Nakamura
Tetsuhiro Ikeda
Tetsuhiro Ikeda
Osamu Shimada

Crew

Creators, directors, writers, and production crew.

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Akira Uchikata
Director, Producer
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Akihiro Kawanabe
Executive Producer
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Kazushi Nagasawa
Executive Producer
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Jun Ishio
Producer
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Masahiko Shibuya
Producer
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Masataka Katsue
Producer
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Shun Kinoshita
Producer
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内丸摂子
Producer
Harumi Fuuki
Harumi Fuuki
Music
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ACA-Ne
Theme Song Performance
Yukito Ayatsuji
Yukito Ayatsuji
Original Story
Hiroyuki Yatsu
Hiroyuki Yatsu
Screenplay

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