Dams and banks have been constructed in order to make it possible to supply water. They were designed by technical experts predicting the future 50 to 100 years later. Nevertheless, threats by the nature considerably exceed beyond our prediction. There arisen disasters by heavy rain and earthquakes every year. Just now, Dams capable of standing against unanticipated disasters are demanded. Damages due to the disasters are tragic. At that time, however, the technical experts start to move in order to create further advanced technologies from there. The harder the damage, the greater the technology by Japanese engineers. I hope Dams and banks will be continuously protected in this way.