Along the shoreline of northeast Japan, a 400-kilometer sea wall has been built to protect people living in the region from future tsunami disasters. This sea wall is already being transformed into a sand dune, with plants starting to grow over it. Although the massive tsunami of 2011 devastated their area, the natural environment has started to recover at a speed that has surprised the experts. Catrina Sugita visits Shinhama to meet the local residents and find out why it has rebounded .