I found these photos recently, they were taken May, 2011
By the way, highly radioactive contaminated hot spot ( 2.707 μSv/h) was found in Setagara ward in Tokyo. It was footway on which many ppl have been passing every day.
The number 2.707 μSv/h looks strange. It is too high. This number is higher than home zone in Fukushima.
I wonder which is scarer, one version; Tokyo (and Japan) has so many hidden hot spots like this, and they only have not found yet, Or.. the other version; someone dumped highly radioactive contaminated thing here, it is very easy to get such hazardous materials in Japan.