| The Decagon House Murders | |
| Ja Kanji: | 十角館の殺人 |
| Ja Romaji: | Jukkakukan no Satsujin |
| Type: | manga |
| Author: | Yukito Ayatsuji |
| Illustrator: | Hiro Kiyohara |
| Publisher: | Kodansha |
| Demographic: | Seinen |
| Imprint: | Afternoon KC |
| Magazine: | Monthly Afternoon |
| First: | August 24, 2019 |
| Last: | April 25, 2022 |
| Volumes: | 5 |
is a Japanese manga series, based on Yukito Ayatsuji's novel of the same name, illustrated by Hiro Kiyohara. It was serialized in Kodansha's seinen manga magazine Monthly Afternoon from August 2019 to April 2022, with its chapters collected in five tankōbon volumes. In North America, the manga is licensed by Kodansha USA.
It 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.
The Decagon House Murders, based on Yukito Ayatsuji's novel of the same name and illustrated by Hiro Kiyohara, was serialized in Kodansha's seinen manga magazine Monthly Afternoon from August 24, 2019,[1] to April 25, 2022.[2] [3] Kodansha collected its chapters in five individual tankōbon volumes, released from November 22, 2019, to May 23, 2022.
Kodansha USA publishes the series digitally in North America from August 17, 2021,[4] to November 29, 2022.