Japan experiences frequent earthquakes due to its location on tectonic plates that push together. It has a long history of deadly quakes and tsunamis, including one in 1923 that killed over 100,000 people. As a result, Japan has developed extensive disaster preparation measures like strict building codes, early warning systems, and frequent evacuation drills to minimize damage and save lives. These precautions show that Japan is the world's most prepared country for earthquakes and tsunamis.