How does Osaka Readings Compare to Nevada?

I recently accepted a job in Osaka, Japan and I've been trying to found out how radiation readings in Osaka compare to Nevada (where I am). I think I've sleuthed all I can sleuth. I was hoping I could get some help from this knowledgeable community at this point.

For radioactivity measures in Nevada, I have used readings found using the links from this forum post section:

http://www.nuc.berkeley.edu/node/2044#others

For radioactivity measures in Osaka, I have followed two leads (there have only been two articles that I have found that report radioactive cesium in Osaka):

***Lead 1.*** Osaka find radioactive substances in sewage sludge: http://enenews.com/osaka-detects-radioactive-substances-sewage-sludge

I followed up on the official city of Osaka webpage here: http://www.city.osaka.lg.jp/kensetsu/page/0000128614.html

A Japanese friend of mine translated this page and here is what it reads:

"Hello. About the article, I read it and in short, they investigated about the sludge in Osaka and they found it safe. The article says as follows: There are some cases that the sludge processed by the sewage disposal system in northern part of Japan contain radioactive ingredients because it is condensed after processed several times. In Osaka city, they collect sludge to sludge processing center, put the sludge through solution system with high temperature and finally form them into glass sludge. After the disaster, Osaka has screened those glass sludge to measure the amount of radiation and the results was about the same as last year, same as in nature. In order to ensure the result, they send the glass sludge to specialized agencies and they found out that the numerical level was in normal range as in other safe areas in Japan. And they don't have to have any special process to the substance because it's not considered as radioactive ingredients now that the level is very low. Therefore, in Osaka city, they don't have any radiation contamination risk due to Fukushima, but they will continue researching it."

This seems OK... I was wondering what people on this forum thought.

***Lead 2.*** Osaka finds Cesium-137 levels 100 times normal levels: http://enenews.com/cesium-137-levels-100-times-normal-levels-osaka-350-m...

Apparently, this data came from Osaka's Institute of Public Health. The only information I could find on the webpage for the Osaka's Institute of Public Health was this article: http://www.iph.pref.osaka.jp/sei-kan/hsen.html

My Japanese friend translated again and here's what it reads:

"Osaka Prefectural Institute of Public Health researches radiation dose rate in air all the time. As of now, the numerical level is between 0.040?min? and 0.063?max?, 0.043?average??Gy/hr and they found no abnormal value. From Mar. 18th, they started researching about atmospheric falling matter such as rain and dust and radioactive substances in clean water, in addition to radiation dose rate in air. And they found no abnormal value on them, either. From the results of atmospheric falling matter from Apr. first to May second, they found Cesium 134?134Cs 8?3MBq/k?, Cesium 137?137Cs? 7?9MBq?k?. But that result was caused by an unusual process of condensing sample and the difference of time for assay. ?The numerical level of the radioactive substances per month in last five years: Cecium137?137Cs??0?0.05 MBq?k? The substances tell that it's because of Fukushima, yet when calculating the number to annual amount of radiation, it will be 0.218?Sv and it's not so big numerical value since the normal annual amount of radiation is 2,400?Sv. Also, they don't have any abnormal amount of radioactive substances from falling matters and in clean water from the data in March."

It seems that the Osaka Institute of Health measures the total amount of Cesium over the course of a month while most Nevada measurements are daily and not cumulative. Other interesting articles on that same webpage were the followed excel files:

http://www.pref.osaka.jp/attach/12861/00000000/ri%20moni.xls
http://www.pref.osaka.jp/attach/12861/00000000/ri%20moni(FA).xls

I was hoping someone on this forum smarter than I could shed some light on the data here. I basically want to know if the Cesium detected in Osaka is similar to the Cesium detected in Nevada. If so, I personally will take the risk and move to Osaka. This is also of interest to me because Osaka is considered a "safe haven" (or it was shortly after the Fukushima Power Plant explosion). Many businesses were considering moving their headquarters from Tokyo to Osaka.

Thank you in advanced for any help. I'll continue researching this on my own and will post any new data or conclusions.

Respectfully,
Chris