Plus hordes of amateur photographers and urban explorers will be trying to sneak into the place, radiation or not.
That said, it was an opportunity for Google to take radiation readings everywhere (perhaps they did but didn't release that information). Looking at the map this town must have been in the north east plume [1] mentioned in the reports.
Sadly since the first survey I can't find links to follow up surveys, the last being done around the end of 2011. Presumably with a wet season behind us there would be movement of ground contamination and I would think that every month they would do another survey if only to create better models about how a contaminated environment evolves. Is rain significant? wind? How much is is encapsulated by plants? Lots of questions.
[1] http://enformable.com/wp-content/uploads/2011/10/New-Japan-R...
Well, quite a lot of people here in Japan now have their own Geiger counters (pretty much everybody I know). The one I bought is a cheap (~ $150) model made by Soeks specifically to address consumer demand in post-Fukushima Japan.
(http://www.amazon.co.jp/ガイガーカウンター-SOEKS-01M-2-0L-JP-NUK-079-...)
The problem got so bad, the authorities resorted to imposing the death penalty on looters.