Today, Tokyo registered a much lower iodine 131 number: 79. This is compared to 210 on the 22nd and 190 on the 23rd. Several possibilities for this are suspected. We had a big rain that washed a lot of it into reservoirs. Also the short half life of iodine 131 is another possible factor. 79 is under the legal limit for infants, but Tokyo is still wisely advising parents to avoid it for now. Other areas near Tokyo did not register such high rates at any point.
_________________________
We are what we repeatedly do - Aristotle