What's happening to the vegetables and produce (such as mushrooms) growing in Japan's poisoned nuclear zone? How much tainted meat & fish enters the market - in Japan or abroad?
Irradiated items are basically indistinguishable from untainted food after leaving the danger area. Few of us can test our meals or supermarket items for radiation. Desperate or profit-hungry people can hide the source of bad & dangerous foods.
Perhaps you believe such things couldn't happen ... Unknowingly, you bet your life.
Here's an article about food scandals in Japan (link). And here (link) is another.
Here's a great article about the nuclear disaster zone in Fukushima and what's growing there now (link)