Murder Mystery: The Miyamoto Mansion Incident

A Japanese tabletop murder mystery scenario for 5 players (4 detectives + 1 game master). Set in a snowed-in modern Japanese mansion during winter, four male survivors must untangle a mystery surrounding a dead body while isolated and unable to communicate or escape. The core gameplay revolves around deduction and roleplay, with players free to develop their own theories and actions. The scenario emphasizes high agency and freedom of choice, branching into over 100 unique endings based on player decisions and reasoning. Designed for beginners with comprehensive GM notes and character sheets, the 3–4 hour experience blends Japanese horror, fantasy, and mystery elements with minimal roleplay and maximum investigative focus.