Japan Tsunami wall

In Japan, People are thinking of building sea wall to protect the coast.  The reason why is because in 2011, a Tsunami ended up destroying Northeastern Japan and ruining its economy.  As a result, a plan has gone through to build a wall on its east coast.  Some people support it saying it will protect them.  Others however say that it will ruin the local economy by discouraging tourism.  The towns would also be responsible to maintaining the walls.  My opinion on this is mixed.  I do agree that the walls should be built.  However, considering what happened in 2011, I don't think the walls will do much It might in fact cause erosion making the area even more vulnerable. The walls would also destroy the already weak economy of the area.  I do believe there should be more debate about the walls.