What were some of the damages done to japan after the tsunami?

Question:

my friend need information about the damages done to japan after the tsunami and why did the wall not hold or save alot of people

Answer:

What do you mean by after tsunami?

Tsunami gave most damage to coastal cities in northern Japan. What struck Japan after that is nuke mess.

>why did the wall not hold or save alot of people

Tsunami was higher than the walls.