Overseas, there is the term Kangaroo court.

It refers to a fraudulent trial in which a fraudulent judgment is issued by an organization that attempts to conduct a trial without justice that ignores the rules in order to make the law a trial in its own favor.

In Japanese, it is a kangaroo trial, but it is called a cheating trial, a cheating trial, a private trial, etc. A kangaroo trial means that all evidence has been tampered with, witnesses perjury, and jump with tonton without a legitimate number of trials, depending on the judge's mood or under the direction of the person behind the judge. It is a fraudulent trial that is carried out an abnormal number of times.

It seems that there are several etymologies, but the most promising one is to ignore the normal rules like a kangaroo jumps, and to compare the way the trial goes on without the necessary witness summons. is. There is a record that this phrase was already used in the United States in the mid-19th century. During the California Gold Rush, there were many acts of claim jumping, ignoring the law, buying courts and judges, and stealing them by fraudulent means, whether on the land or money of others. It seems that the claim jumping jump and the kangaroo jump were combined.