One large fact is that the Japanese are incredibly prepared for quakes.
That's one of the reasons I'm more hopeful about the Nuclear Plants situation.
This isn't Russia or even America here (not that I don't have high regard for my own USA.. ), this is Japan.
I think it's likely that they are the best prepared people to handle this type of issue, not just Earthquakes and Tsunami's, but also in dealing with Nuclear issues...
I'd be a bit less optimistic if it happened here.. Could be wrong, but..
When talking about Tsunami here on the Oregon coast, someone asked our State geologist if we were lucky this time. She basically said yes and no.
Yes, because we got the other end of it.
And no, because if it has happened off of our coast (and we have similar subduction plates), we would be in much worse shape than in Japan because we are much less prepared...
desiv