A recent report by a US based governmental consulting company on the Japan disasters and implications for if something as catastrophic happened in the US. No affiliation to it, etc. Japan apparently advised 48 hr. of personal preparation nationwide; not nearly long enough for those in the area affected. A good bit of this roundtable is redundant, but there are numerous details and points I haven't seen elsewhere:

http://www.cna.org/sites/default/files/news/2011/SAS%20Experts%20Roundtable%20on%20Great%20East%20Japan%20Earthquake%20%283%29.pdf