Meteocentrale website forecast for radiation dispersion is clear for Tokyo except from Monday evening as can be seen on the screenshot below. Fukushima plumes will cover the whole Kanto area from a low altitude. This forecast is based upon the assumption of typhoon 16 moving northeasterly as currently predicted by the Japanese Meteorological Agency. Any change in its course will divert fall-out carried winds. The renewal of short-lived Iodine-131 has been interpreted as a renewed criticallity in Fukushima, although of course officially denied (Cf. Fukushima in Recriticality ? in SurvivalJapan). Hence tomorrow’s fall-out may include more than just the usual Cesium.