Besides the radiation from Fukushima entering your body every breath you take, why there’s no place on Earth where this is a not a relevant issue: It’s as true in Japan as it is elsewhere: nuclear regulators are too cozy with the nuclear industry. Whenever there’s an impartial inspection, we hear pretty much the same thing: if there were a serious accident, they’re not ready. And the US is no exception. And, even at the most basic level of preparedness (monitoring): the USA has LESS radiation monitors than tiny countries like Belgium (not kidding).
Have a look at the map of all the locations of nuclear power plants in the world, including a map for the nuclear power plants in the United States and Canada, and then ponder the implications for what statistically is far more likely that they admit.