The Tokyo Metropolitan Ordinance that's about the healthy development of youths is a law that is meant to keep kids safe. It's all about making sure that kids can grow up in a safe and healthy way. To start, it sets rules about how much time kids can spend using technology such as phones, TVs, and video games. It also sets rules about how much time kids are allowed to spend in places like arcades and amusement parks. Finally, it sets rules about how much time kids can spend outside and exercising. All these rules are meant to keep kids safe and healthy and make sure they get enough rest and exercise.