Just because an accident happened, doesn't make it less safe. That is not how statistics work.
By "country-worth of mess" do you mean the 20km exclusion zone? The biggest mess to come from Fukushima is the political mess from TEPCO trying to cover stuff up.
And, to answer you question, absolutely nothing (nobody?). However, they don't tend to build power plants on fault lines, so the probability is very low. Similarly low, in fact, to a Magnitude 9 'quake happening directly under Tokyo, and I can guarantee that that would cause a bigger mess.