Why Japan Built the World’s Largest 400-Kilometer Tsunami Wall
On March 11, 2011, Japan’s confidence in its coastal defenses collapsed in plain sight. A tsunami close to 50 feet high surged ashore within minutes, overtopping seawalls that engineers believed could protect entire communities. Towns disappeared. More than 20,000 lives were lost. Around 120,000 homes were destroyed. What stunned researchers was not the earthquake alone….
