This document discusses the 2011 earthquake and tsunami that struck Japan. It began with definitions of disaster and descriptions of different types of natural and man-made disasters. It then provides details of the March 11, 2011 Tohoku earthquake off the coast of Japan that triggered massive tsunami waves up to 133 feet high, causing over 15,000 deaths. The tsunami damaged over 125,000 buildings and caused radiation contamination from affected nuclear power plants, resulting in long-term environmental damage. The response efforts included search and rescue operations, food and medical aid, shelter, and rebuilding infrastructure.