The Decagon House Murders
十角館の殺人
We checked 8 streaming services in India on 04 Jun 2026 at 15:03 IST
About
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.
Cast
Tomoya Oku
as Takaaki Kawaminami
Munetaka Aoki
as Kiyoshi Shimada
Akihiro Kakuta
as Koujiro Nakamura
Toru Nakamura
as Seiji Nakamura
Ayumu Mochizuki
as "Ellery"
Neru Nagahama
as "Agatha"
Yuki Imai
as "Leroux"
Kosuke Suzuki
as "Poe"
Reia Yonekura
as "Orczy"
Rukiya
as "Carr"
Hiroto Kobayashi
as Kyoichi Morisu
Asumi Kikuchi
as Chiori Nakamura
Mari Hamada
as Kuniko Matsumoto
Tamiyo Kusakari
as Masako Yoshikawa
Yasuyuki Maekawa
as Seiichi Yoshikawa
Aoba Kawai
as Kazue Nakamura
Tetsuhiro Ikeda
as Osamu Shimada
Seasons
Episodes
Season 1
Episode 1
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.
Episode 2
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.
Episode 3
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.
Episode 4
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.
Episode 5
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.
Where does The Decagon House Murders rank today?
The Decagon House Murders is #2010 on the Bowood.TV Daily Streaming Charts today.
- Highest: #2010
- Top 10: 0 days
- Top 100: 0 days
Watch The Decagon House Murders Online Free — All Episodes in HD
Looking for a place to watch The Decagon House Murders online for free? You've landed on the right page. The Decagon House Murders is a highly acclaimed Japanese mystery series from 2024 that you can stream right now on Bowood.TV in high quality, no signup required.
About The Decagon House Murders
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. Across 1 season and 5 episodes, originally airing on Hulu.
The Decagon House Murders Cast and Characters
The cast features Tomoya Oku (as Takaaki Kawaminami), Munetaka Aoki (as Kiyoshi Shimada), Akihiro Kakuta (as Koujiro Nakamura), Toru Nakamura (as Seiji Nakamura), and Ayumu Mochizuki (as "Ellery"). Their performances are a major reason The Decagon House Murders has built such a passionate audience.
Where to Watch The Decagon House Murders Online
Bowood.TV lets you stream The Decagon House Murders online free, instantly, in HD. There's nothing to install — open the page, hit play, done. Works perfectly on Jio, Airtel, Vi networks across India and on slow mobile data thanks to our adaptive video pipeline.
▶ Watch The Decagon House Murders NowWhy People Are Watching The Decagon House Murders
There's a reason The Decagon House Murders keeps showing up on "must-watch" lists. What makes it work is tight pacing that earns its twists. If you enjoy Japanese storytelling that doesn't follow the same tired beats, this is the kind of show you'll end up recommending to friends.
Frequently Asked Questions about The Decagon House Murders
Where can I watch The Decagon House Murders online for free?
You can watch The Decagon House Murders online free on Bowood.TV. Just open the page and hit play — no signup, no subscription, full HD streaming on phone, tablet, or desktop.
How many episodes does The Decagon House Murders have?
The Decagon House Murders has 5 episodes across 1 season. All episodes are available to stream right here on Bowood.TV.
Is The Decagon House Murders good? What's the rating?
The Decagon House Murders holds a 8.7/10 rating based on 11 reviews — genuinely excellent.
Who is in the cast of The Decagon House Murders?
The main cast includes Tomoya Oku, Munetaka Aoki, Akihiro Kakuta, and Toru Nakamura, plus a strong supporting ensemble.
Is The Decagon House Murders available in Japanese?
Yes — The Decagon House Murders was originally produced in Japanese and that's the version you'll stream here on Bowood.TV. English subtitles are provided when available.
When was The Decagon House Murders released?
The Decagon House Murders first aired in 2024.
Do I need an account to watch The Decagon House Murders on Bowood.TV?
No. Bowood.TV is free and you can watch The Decagon House Murders without creating an account. Sign-up is optional — only useful if you want a personal Watchlist or to comment on episodes.
Similar Series You Might Like
If you enjoyed The Decagon House Murders, check out A Touch of Frost, Partners in Crime, Bitter Blood, Above the Wall, and Station Eleven.
Frequently Asked Questions
Where can I watch The Decagon House Murders for free?
You can watch The Decagon House Murders online for free on Bowood.TV. All 5 episodes across 1 season are available to stream in HD without a subscription, signup, or paywall. Just open the show page and press play.
How many seasons and episodes does The Decagon House Murders have?
The Decagon House Murders currently has 1 season and a total of 5 episodes. The series status is "Ended", so the episode count may grow as new seasons are released. You can browse the full episode list on Bowood.TV and continue watching from where you left off.
What is The Decagon House Murders about?
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. It belongs to the Mystery genre.
In which language is The Decagon House Murders originally available?
The Decagon House Murders was originally produced in JA. On Bowood.TV the show is available in its original JA audio. Check the player options on the watch page for available subtitle tracks.
When was The Decagon House Murders first released?
The Decagon House Murders first premiered on March 22, 2024 (2024). The series has since concluded its run.
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