Hello and Welcome to nipponcraft.com,
The Ministry of Education, Science & Technology of Japan is measuring and collecting radioactivity data from all over Japan and announces the results on its website: http://www.mext.go.jp/. (You can find English page on the website.)
Tokyo Metropolitan Institute of Public Health is also providing radioactivity level in Tokyo:
http://www.tokyo-eiken.go.jp/index.html
According to the website information, the radioactivity level in Tokyo yesterday (April 18th, 2011) was 0.075μSv/h while the maximum level in the past (before the Fukushima Nuclear Plant accident happened) was 0.028 - 0.050μSv/h.
I find TEPCO (Tokyo Electric Power Company) is also measuring the radioactivity level in Shibuya (in Tokyo) by their own efforts and that the information is provided (only in Japaneses ) at http://www.tepco.co.jp/nu/pamp/index2-j.html. According to the information, the level today (April 19th, 2011) is 0.045μSv/h outside.
It looks like that the radioactivity level is withing the allowance defined by the government. I can survive in Tokyo.
- Ken
http://www.nipponcraft.com/
