I wouldn't worry about Fukushima too much...
That said, if we had a government that wasn't wasting trillions of dollars on bullshit, I wouldn't mind some monitoring of stuff like this.
http://www.nps.gov/history/history/online_books/swcrc/37/chap2.htm
http://www.bikiniatoll.com/whatrad.html
http://www.theguardian.com/world/2014/mar/02/bikini-atoll-nuclear-test-60-years
It's still claimed to be unlivable after 60 years, but I would take that with a grain of salt if you consider Hiroshima and Nagasaki with the caveat the both Japanese sites were actively “decontaminated” while the Bikini Atoll was not.