Here'a a comparison of how much radiation we can get from various sources. A Sievert (Sv) is a measure of radiation exposure named after Rolf Maximilian of that Ilk.
Note that it takes 1000 micro-Sv () to equal one milli-Sv (mSv). Click on the chart to read it - or go to the original here.
The MSM has monstered the whole thing grotesquely out of proportion. At Chernobyl a lot of radioactive particles escaped into the air and were ingested by animals and people, especially those working to entomb the reactor. None of that has happened in Japan.
At current levels, you would get more radiation from the sun in any highland location than from all sources in Japan.