In Japan, there are special machines called radio stations that send music and talking into the air using a special technology called FM broadcasting.
When you turn on a radio and tune it to a certain station, you can hear the FM signal being sent out by that station. It's kind of like when you shout into a megaphone and people can hear you from far away - but in this case, the radio signal travels through the airwaves instead of sound waves.
FM broadcasting in Japan is really neat because it allows people to listen to all kinds of music and shows from all over the country. The stations have special licenses that let them broadcast on certain frequencies so that they don't interfere with each other.
Plus, some stations even have special features like traffic updates, weather reports, and news broadcasts. So not only can you listen to your favorite music, but you can also stay informed about what's happening in your city or town.
So the next time you turn on your radio and hear music or talking coming from it, remember that it's all thanks to FM broadcasting - a technology that helps connect people across Japan through the power of sound!