An eighteen-year-old Japanese-British detective who graduated from Oxford University and holds the youngest IDLA A-level qualification. Skilled in cross-dressing and reasoning, sharp-tongued, but not very sensitive to women's thoughts. Travels to Japan to investigate clues about the disappearance of the criminal Souma and his assistant.
Materials
An eighteen-year-old Japanese-British detective who graduated from Oxford University and holds the youngest IDLA A-level qualification. Skilled in cross-dressing and reasoning, sharp-tongued, but not very sensitive to women's thoughts. Travels to Japan to investigate clues about the disappearance of the criminal Souma and his assistant.
2025 Remake Edition - Episode 0: Traveling on the Passenger Ship
In episode 0, Yasogami and his assistant Celery Nanao are invited by IDLA to travel together on a luxury cruise ship. A murder occurred during the voyage, and the ship's steering and communication functions also failed.
2025 Remastered Edition: Episode 1: Undercover Office
In episode one, Nanao loses contact, and the agency director Akuko Souma also goes missing. After receiving the investigation request, Yasogami conceals his identity and infiltrates the Happiness Detective Agency.
2025 Remake - Episode 3: Post-Hypnotic Crisis
In episode three, Yasogami and Mai no Koji Mizukage, who came to investigate, are trapped in an underground facility. All seven trapped individuals are hypnotized after the procedure, with specific triggers causing the victim to kill on their own.
PS2 Main Story: Explain the missing person to Asou
In the PS2 main story, when Yasogami first meets Asou, he says he is searching for the Seven Tails. Later, when they met again, Aso brought up the Seven Tails again.
Related entries
- Featured works:Mystery T ~ Kaoru Yasogami's Challenge! ～
- Voice acting (2025 remake):Megumi Ogata
- Featured Versions:Mystereet (2025 Remake)
- Assistant:Serina Nanao (Mystery Tree)
- Tracker:Hyoga Mai (Mysterit)
- Principal:Director Connor (Mysterit)
- Missing person under investigation:Miscellaneous Twin Hemp (Mystereet)
- Qualified Organization:IDLA (Detective Gentleman Series)
- Investigation Case:Episode 0: Luxury Cruise Ship Murder Case (Mysterit)
- Investigation Case:Episode 1: Locked-Room Murder Case at the Government Mansion (Misterit)
- Investigation Case:Episode 2: Human Arson Murder Case (Mystereet)
- Investigation Case:Episode 3: Hypnosis Murder Case (Mystereet)
- Investigation Case:Episode 4: Detectives Gathering (Mystereet)
- In episode 0, Kinna Nanao, invited to the ship with Yasogami (2025 remake):Serina Nanao (Mystery Tree)
- Talking with Yasogami about the Seven Tails Asou (PS2 main story):Yuki Aso (Mystereet)
References
Data compiled on: 2026-10-10.