It should come as no surprise that the wild mushroom called “Chichitake” or, in Japanese, チチタケ（乳茸、Lactarius volemus） was found to contain a high level of radioactive cesium in Fukushima.
Cesium134 : 13000 Bq/kg
Cesium 137 : 15000 Bq/kg
As a reminder, the Japan legal limit, which is exceptionnally high in order to accomodate the uncontrolable events of late, is 500 Bq/kg.
Of course nobody in their right mind would eat any mushroom from eastern Japan but given the current mass-delusion that it is alright to live there, it can save someone’s life to remind them not to accept any “Omelette aux Champignons” these days and for about a century. Half-life of cesium is 30 years, so after 90 years there remains more than 90 percent of it. Recent field research in Belarus shows that actual concentrations are much higher in soil than the theory would have it. This is why eastern Japan is referred in this blog as a no man’s land, just like nobody would live in Belarus.
Mushrooms absorb radioactivity and even nowadays, in western Europe, relatively far away from Belarus, their dose values are higher than before the Chernobyl disaster. On a much smaller scale of Japan, it would seem advisable to avoid all mushroom types, wherever they were picked in. Wild berries should probably be avoided as well. Be warned.