On March 11, 2011, the most disastrous earthquake and tsunami in modern Japanese history occurred in northeast Japan. They caused a great calamity for the people and industries on the Pacifi c coast of the Tohoku region of Japan, one of the most important regions for Japanese fi sheries. The Fukushima Dai-ichi Nuclear Power Plant (FNPP) was covered by a 15-m-high tsunami, and the electric power…