Japan has invested billions in preparing for the "superquake". They built Tokyo - a skyscraper metropolis - right next to one of the earth's most active fault lines. Their investment paid off when the greatest quake in the nation's memory came last Friday - in Tokyo it was Man who won in the battle with Mother Nature. Astonishingly just 4 people lost their lives. But North of Tokyo, Man's best attempts to prepare for a tsunami proved no match for the force of Mother Nature. Tens of thousands are feared dead, entire communities have been swept away by the giant wave that hit with little warning and maximum force. The Pacific Ocean early warning system worked - but the quake was so close to the coast it gave hundreds of thousands of people only moments to escape.