Jukkakukan no Satsujin
The Decagon House Murders
What would you like to edit?

Jukkakukan no Satsujin

Alternative Titles

Japanese: 十角館の殺人
English: The Decagon House Murders
More titles


Type: Manga
Volumes: 5
Chapters: 32
Status: Finished
Published: Aug 24, 2019 to Apr 25, 2022
Genres: Mystery Mystery, Suspense Suspense
Theme: Detective Detective
Demographic: Seinen Seinen
Serialization: Afternoon
Authors: Kiyohara, Hiro (Art), Ayatsuji, Yukito (Story)


Score: 7.441 (scored by 571571 users)
1 indicates a weighted score.
Ranked: #34142
2 based on the top manga page. Please note that 'R18+' titles are excluded.
Popularity: #7811
Members: 2,345
Favorites: 15

Available At


Ranked #3414Popularity #7811Members 2,345
Add to My List
Volumes: /5
Chapters: /32


Seven students, members of their university's mystery club, decide to spend a week-long vacation on Tsunojima Island off the coast of Japan. Six months earlier, the owner of the island was brutally murdered alongside his wife and housekeepers, and the case remains unsolved. Soon after their arrival they begin to suspect that one of their number is intending to kill them one at a time, but who?

(Source: Wikipedia)


Jukkakukan no Satsujin was published digitally in English as The Decagon House Murders by Kodansha USA from August 17, 2021 to November 29, 2022.

Related Manga


Kawaminami, Akira
Shimada, Kiyoshi
Morisu, Kiyochi


Jul 16, 2023
I adored Decagon House. Yes, it takes some leeways here and there, but not enough to be troubling. Decagon House is an interesting twist on one of my favorite books (and old mystery movies), Ten Little Indians, written by the one of the greatest mystery writers of all time, Agatha Christie. There's also a nice homage to Sherlock Holmes with some Holmes & Watson moments. Seven college friends and lovers of mysteries arrive on a supposedly deserted island only to find themselves being picked off one by one. Who is the culprit? Will they figure it out before the last of them is ...
Jan 21, 2024
The Decagon House Murders:
An introduction to Honkaku Mystery

When Agatha Christie’s famous novel “And then there were none” came out it spawned a new kind of genre based on the popular whodunnit story.

This is the Honkaku Mystery, as I learnt reading this manga, a subgenre of mystery that focuses on fair play.

Characters were stuck all together in one place with no way of escape, and one by one they all died. So by logic the murdered was amongst them and the characters needed to find out who was the one that was murdering them all.

In Japan, the novel of the Decagon House Murders saved ...
Jul 7, 2023
Mixed Feelings
I did not read the original novel, I only read the manga. From the manga, as a detective story “The Decagon House Murders” is quite average. Nothing outstanding, but nothing too bad either. The story starts with way too many characters at once, it was hard to track who is who at first. The characters had an alias and real name only added to the confusion. The characters became more clearly defined later. The story is similar to Agatha Christie’s “And then there were none”. If you liked "And then there were none", then you might like this one. Of course, there is ...

Interest Stacks

28 Entries · 1 Restacks
by wavaxx
24 Entries · 52 Restacks
by iliad33
23 Entries · 13 Restacks


Recent News

North American Anime & Manga Releases for April

North American Anime & Manga Releases for April

Here are the North American anime, manga, and light novel releases for April Week 1: April 5 - 11 Anime Releases Grenadier: Hohoemi no Senshi (Grenadier: The Beautif...read more

North American Anime & Manga Releases for October

North American Anime & Manga Releases for October

Here are the North American anime, manga, and light novel releases for October. Week 1: October 5 - 11 Anime Releases C³ [incl. Rinkan Gakkou Confusion!] (C&sup...read more

Recent Forum Discussion