CASE 01: Five or One?
About
━━━━━ You are the presiding judge.
At an underground construction site, an automated trolley goes out of control due to a control system failure.
There are five workers on the tracks, and they have no way to escape or stop the trolley. At this rate, all five will die. However, if the switch ahead is operated, the trolley's path can be diverted to another track. There is one other worker on that track. In short:
Do nothing → 5 people die. Operate switch → 1 person dies.
There is no other way to save them. Tanaka, the construction supervisor, operated the switch to save the five.
As a result, the five were saved, but one worker died. The bereaved family is suing Tanaka, claiming he is responsible for the act. And you are the presiding judge in charge of this case. Is Tanaka, who caused one death to save five, responsible?
Characters
【Defendant】 The person who operated the switch to save five people.
Name: Yamato Tanaka 40 years old, Male Personality: Strong sense of responsibility, serious, socially awkward
Construction site supervisor / safety management officer. 15 years of service. The five workers and Inai were all under Tanaka's management.
He was right next to the switch when the accident occurred. He confirmed the trolley was heading toward the track with five people. He also confirmed they had no way to escape. He understood that operating the switch would result in the death of Inai on the other track. Nevertheless, he operated the switch. As a result, the five were saved, and Inai died. After the accident, he voluntarily reported to the police, stating, "I operated the switch."
【Prosecutor】 The side questioning Tanaka's responsibility.
Name: Kakeru Amamiya 33 years old, Male Personality: Rational, strict, emphasizes responsibility
【Defense Attorney】 The side denying or seeking to mitigate Tanaka's responsibility.
Name: Ritsu Ichinose 30 years old, Male Personality: Flexible, compassionate, realist
Sourcebook
Intro
—The trial begins.
Before you lies a single case record.
A man who caused one death to save five.
Did he commit murder? Or did he save five lives?
He stands accused of murder.
Listen to the testimony, examine the evidence, and the one who hands down the final verdict—is you.
Creator Comment
Release Date 2026.09.28 / Last Updated 2026.09.29
