The trees (Japanese black pine etc.) of a kind unsuitable on the seashore in Japan until now have been planted. 

It became clear at the Great East Japan Earthquake. 

From now on, it is necessary to build the suitable forest for protecting people's lives from tsunami in Japan. It is the forest which suited the climate. It is the forest which low trees and high trees mixed. And it is a forest like a primeval forest. 

About how to build the forest, at first, the hill is built along the coastline using the rubble and scrap woods which were left behind by the earthquake disaster. The full length of the hill is about 400 km. Next, the trees of various kinds which suit the climate are planted on the hill.