The Committee to Nuke Elysium

Yukio Edano, the chief cabinet secretary, said that spinach and milk were the only two products that were found with abnormally high levels of radioactive materials. The newly discovered radioactivity contained in the average amount of spinach and milk consumed during an entire year would be equal to the amount received in a single CAT scan.

..Food safety inspectors said that the amount of iodine-131 found in the tested milk was five times higher than levels deemed safe. They said that the iodine found in the spinach was more than seven times higher. The spinach also contained slightly higher amounts of cesium-137.

Iodine-131 and cesium-137 are two of the more dangerous elements that are feared to have been released from the plants in Fukushima. Iodine-131 can be dangerous to human health, especially if absorbed through milk and milk products, because it can accumulate in the thyroid and cause cancer. Cesium-137 can damage cells and lead to an increased risk of cancer.

..Leafy spinach is especially susceptible to absorbing radioactive material, Mr. Ohara said.

Asparagus, cucumbers, radish, tomatoes and other vegetables are also grown in Fukushima, but have not been found to be contaminated. However, only a small number of farms have been tested because officials have been overwhelmed in the wake of the earthquake, tsunami and the nuclear crisis that followed, Mr. Ohara said.

The government has not banned shipments of milk or spinach from the affected areas, but it would further study the issue, Mr. Edano said. The milk that contained higher levels of radioactive material was tested at farms about 19 miles from the hobbled nuclear plants in Fukushima Prefecture. The spinach was found in Ibaraki Prefecture farther south.