IAEA reports very little contamination of Japanese food found in testing:
"Since our written briefing of 1 April 2011, significant data related to food contamination was reported on 1 April (33 samples), 2 April (64 samples) and 3 April (37 samples) by the Japanese Ministry of Health, Labour and Welfare. These reported analytical results covered a total of 134 samples taken on 15 March (2 samples), 29 - 31 March (77 samples) and 1 - 2 April (55 samples). Analytical results for 133 of the 134 samples for various vegetables, spinach and other leafy vegetables, mushrooms, fruit (strawberries), various meats (beef and pork), seafood and unprocessed raw milk in twelve prefectures (Chiba, Fukushima, Gunma, Ibaraki, Kanagawa, Kyoto, Niigata, Saitama, Shizuoka, Tchigi, Tochigi and Tokyo), indicated that iodine-131, caesium-134 and/or caesium-137 were either not detected or were below the regulation values set by the Japanese authorities. One sample of shiitake mushrooms taken on 1 April in Fukushima prefecture was above the regulation values set by the Japanese authorities for both iodine-131 and caesium-134/caesium-137."
http://www.iaea.org/newscenter/news/tsunamiupdate01.html
"Since our written briefing of 1 April 2011, significant data related to food contamination was reported on 1 April (33 samples), 2 April (64 samples) and 3 April (37 samples) by the Japanese Ministry of Health, Labour and Welfare. These reported analytical results covered a total of 134 samples taken on 15 March (2 samples), 29 - 31 March (77 samples) and 1 - 2 April (55 samples). Analytical results for 133 of the 134 samples for various vegetables, spinach and other leafy vegetables, mushrooms, fruit (strawberries), various meats (beef and pork), seafood and unprocessed raw milk in twelve prefectures (Chiba, Fukushima, Gunma, Ibaraki, Kanagawa, Kyoto, Niigata, Saitama, Shizuoka, Tchigi, Tochigi and Tokyo), indicated that iodine-131, caesium-134 and/or caesium-137 were either not detected or were below the regulation values set by the Japanese authorities. One sample of shiitake mushrooms taken on 1 April in Fukushima prefecture was above the regulation values set by the Japanese authorities for both iodine-131 and caesium-134/caesium-137."
http://www.iaea.org/newscenter/news/tsunamiupdate01.html