My understanding is that the radiation danger isn't severe even in Japan itself, so long as you're not actually inside the evacuated zone around the problem nuclear plant (most areas received no additional radiation at all). Also, pretty much all the potentially dangerous radioactive particles that have been released have a short half-life (8 days for iodine-131), so even stuff that's in Fukushima right on top of the nuclear plant will probably be okay again within the next couple of months. Any radiation disclaimers you see on exported non-agricultural goods are intended to reassure people who have been listening to the more alarmist "news" outlets.