I live in between Tokyo and Yokohama, about 300km/190 miles from the Fukushima Dai-ichi nuclear power plant. Every day I worry about the effect of radiation on myself, my wife and especially my 11-month old daughter.
The biggest potential problem is food and drink. For our daughter, it’s bottled mineral water which we boil, and for us, we filter our tap water which by all accounts appears to be safe. Food is a lot trickier. We check signs and labels at supermarkets and use this site to find more details (in Japanese). I use this excellent site to check out the status of Fukushima. Finally, I check this site for airborne radiation. What a way to live!