Japan Radiation Map

Map in English and in Japanese.  Choose the Prefecture whose map you want to see.  You might start with one whose color code is other than "normal."

Realtime radiation data collected via the System for Prediction of Environment Emergency Dose Information(SPEEDI).

To make sense of this, you need to view some of the posts about the levels of radiation, because there is huge hype.

No one has got radiation sickness yet. 

You could eat the "contaminated" food for a year & get less radiation than one cat scan.