Tokyo station is contaminated as mandatory evacuating zone in Fukushima by Mochizuki February 25, 2012

Following up this article ..Tokyo is contaminated as the worst place in Chernobyl

On 2/21~23/2012, a Twitter user measured radiation level at Tokyo station and it turned out to be 2.94~6.5 microSv/h.(Only gamma ray)

↓ Aisle from Yaesuguchi underground parking lot to underground mall of Tokyo Station

↓On the platform of Tokaido Shinkansen

The picture above is one of the 6 measurements.

The results are like this below

1m height from the ground : 6.5~4.8 microSv/h

1.8m height from the ground : 3.0~4.2 microSv/h

6.5 microSv/h is converted to 57 mSv/y.

It’s higher than 50 mSv/y in mandatory evacuating zone in Fukushima.

The reason of this high level of contamination is assumed to be because hot particles are brought from Fukushima or North Japan by the shoes of passengers.

Source