Who Was the Monster with 21 Faces? Japan’s Biggest Unsolved Mystery

In the 1980s, Japan was terrorized by an anonymous group calling themselves “The Monster with 21 Faces.”
They poisoned candy, blackmailed companies, taunted police with letters—and vanished without a trace.
Despite nationwide manhunts and televised pleas, the case remains unsolved to this day.

Who were they… and why did they disappear so suddenly?

👇 What’s your theory? Drop it in the comments.