Final Post update. For info on radiation now please use links below in this post. Radiation seems to be now steady and completely normal.

31st  March The radiation today in Nagano was an average of 0.049 microsieverts or 0.000049 millisieverts.   No Iodine or Cesium recordable at all.

27, 28, 29, 30th March The radiation today in Nagano was an average of 0.047 microsieverts or 0.000047 millisieverts.   No Iodine or Cesium recordable at all.

26th March The radiation today in Nagano was an average of 0.050 microsieverts or 0.000050 millisieverts.   No Iodine or Cesium recordable at all. All safe.

25th March The radiation today about the same again in Nagano with an average of 0.051 microsieverts or 0.000051 millisieverts.  All safe.

24th March The radiation today about the same again in Nagano with an average of 0.052 microsieverts or 0.000052 millisieverts.

23rd March The radiation today was lower again in Nagano with an average of 0.053 microsieverts or 0.000053 millisieverts.

……Original Post……………………………………………………………………………

As promised here is an excellent link where the radiation for Nagano is displayed on a graph.

http://mextrad.blob.core.windows.net/page/20_Nagano_en.html
And another where you can find the radiation levels all around the country.
http://www.mext.go.jp/english/radioactivity_level/detail/1303986.htm

The first block of links for Northern Japan will show the more radiation effected areas, Generally peak radiation is well below notifiable levels. Notifiable levels mean going right off the top of the graph on most of these pages.

From today onward I will simply continue to update this post rather than adding a fresh post every day. I will discontinue posting this data when it is clear the Fukushima issue is fully resolved.

You can find water radiation contaminant info at the bottom of the pages linked too above.

For Tokyo http://mextrad.blob.core.windows.net/page/13_Tokyo_en.html. This does not agree with media reports. Perhaps it is for the wider area or the problems there are in a localised area. Will try to find out why.