Wow, you really have no clue just what resources are put into earthquake preparation in this country(*), do you? And you really think the seventh worst earthquake in recorded history is somehow comparable to Katrina, eh?
The building codes are the strictest in the world, schools and businesses have multiple earthquake drills a year, there are educational earthquake and tsunami centers all over, they have the military do training drills...well, I don't know exactly how often, but I see it a LOT. The coasts are barricaded with concrete tetrapods to take the kick out of oncoming tsunamis, and they seem to keep adding tetrapods on top of the old ones. They have air raid sirens at the ready, and they drill them fairly regularly (again, I don't know the frequency in hard numbers, but it's frequent). A week before the earthquake, my son came home from kindergarten telling me how hikinamis are much worse than tsunamis---they teach all this shit to the kindergarten kids to keep them prepared. And so on and on and on.
Would you kindly inform us in concrete terms what the Japanese should have done that they didn't to prepare for the seventh worst earthquake in recorded history?
(*) By "this country" I mean Japan.