Jukkakukan no Satsujin: Story, Cast and Series Facts

Story and premise

In 1986, Tsunojima Island was home to the Decagonal House, a strange mansion with a decagonal appearance. The genius architect who built the mansion, Nakamura Seiji, died mysteriously in the burnt-down main building, Aoyashiki. Six months later, seven members of the University Mystery Research Club visit Tsunojima, which has become a deserted island, for a training camp. Meanwhile, on the mainland across the sea, Kawaminami Takaaki, a former member of the Mystery Research Club, receives a letter from Nakamura Seiji, who was supposed to be dead. As he continues his investigation, Konan meets a man named Shimada Kiyoshi, and they start working together. Meanwhile, in the Decagonal House, one of the members of the Mystery Research Club is murdered by someone. "Who on earth is the culprit?" The members become suspicious and start to suspect each other... It will be a week before they can leave the isolated island of Tsunoshima. What is the shocking conclusion beyond imagination that arises from these two stories?

Series details

• Title: Jukkakukan no Satsujin
• Format: Scripted
• Genres: Drama, Thriller, Mystery
• Premiere date: 2024-03-22
• Final broadcast date listed: 2024-03-22
• Status in TVmaze: Ended
• Web channel listed by TVmaze: Hulu Japan
• Network country: Japan
• Typical episode runtime: 47 minutes
• TVMaze ID: 76717
• IMDb ID: tt31898580
• TVDB ID: 443659

Seasons in the TVmaze catalogue

• Season 1: premiered 2024-03-22; final listed air date 2024-03-22.

Source and licence

Adapted from Jukkakukan no Satsujin on TVmaze. The synopsis is reproduced as plain text; catalogue facts, cast and season records are selected and reformatted. This adapted text is available under CC BY-SA 4.0, following the TVmaze API licence. Network and web-channel credits identify the service listed in this source; they do not establish current streaming availability.