In Japan, the crime-arrest ratio for homicides is 96%, which is much higher than in many other countries, yet the number of crimes occurring around us in the rise. Such crimes include ore-ore fraud (in which the fraudster tricks the victim into transferring money to a bank account by pretending to be a relative in trouble), the use of illicit drugs, stalking, and domestic violence. Recently, the crime-arrest ratio for crime as a whole has dropped to around 30%. Safety is the cornerstone of life, and also constitutes part of the value of the nation of Japan. The ability of the police to use technology to maintain safety while also safeguarding the rights of citizens therefore needs to be improved.