Last October, four people, including a 25-year-old suspect, were arrested for breaking into a pawn shop in Matsudo City, Chiba Prefecture, and stealing watches, rings, and other items worth approximately 2.9 million yen. The Metropolitan Police Department is investigating the group as an anonymous and mobile criminal group, as there was evidence that they had communicated with a person who appeared to be instructing them through a highly confidential communication app.