Japan built one of the world’s most extraordinary coastal defenses: a massive 400-kilometer seawall designed to protect communities from tsunamis and powerful ocean waves.

But why did Japan need a wall this enormous? What happened that made coastal protection so urgent—and can a giant seawall really stop the ocean?

In this episode, we explore Japan’s 400 KM seawall, tsunami defenses, coastal engineering, the 2011 Japan earthquake and tsunami, disaster prevention, and Japan’s battle against the sea. Discover how engineers transformed Japan’s coastline in an effort to protect homes, cities, infrastructure, and lives from future disasters.

From the devastating power of the Pacific Ocean to Japan’s cutting-edge disaster preparedness, this is the fascinating story behind one of the most ambitious coastal engineering projects ever bui ...