Japanese are very resilient, they've been going through catastrophies for centuries. It's what formed their internal discipline, culture and believes. They will be back on their feet and stronger in no time.
As for the reactor, I'm no expert. But since Chernobyl left no effect on me, even despite my parents being there during the radioactive maximum (and I was in the womb
), I'm confident that mankind will survive. That's all that matters.