In recent years, countries around the world, including Japan, have witnessed the frequent occurrence of disasters such as torrential rains and flooding events arising as a result of global warming and earthquakes. This has raised the importance of taking prevention measures against various forms of disasters. In the event of such large-scale disasters, preventing and minimizing damage is of the utmost importance. This can be done through enhancing the voluntary disaster prevention capability of each region, and through self-help and mutual assistance.