A Report on Non-Ionizing Radiation

Japan: Microwave News Article Archive (2004 - )

October 23, 2018

Japanese and Korean officials are working on a partial replication of the U.S. National Toxicology Program (NTP) animal study on cancer risks from cell phone radiation. The project is expected to be approved and get underway late next year.

Though collaborating on a common experimental design, each country will carry out its own exposures with animals from the same breeder. If the designs are similar enough, the two sets of data will be combined in a joint analysis.

“We have been discussing this issue in Japan,” said Masao Taki of the Department of Electrical and Electronic Engineering at Tokyo Metropolitan University, who was a member of ICNIRP from 1996 to 2008.

May 31, 2008

Some news notes on the Interphone study:

• Those who say there are no long-term cell phone risks often point to the Interphone study from Japan, published earlier this year, for support. As we have previously reported, the Japanese researchers said there was no association between cell phones and brain tumors, even though they found a close to sixfold increase in glioma among heavily-exposed users after ten or more years (see our February 15 post). That link was based on a small number of cases and was not statistically significant; the Japanese attributed the increase to recall bias. Bruce Hocking, an occupational and environmental health physician in Melbourne, Australia, suggests otherwise. In a letter published this week in the British Journal of Cancer, Hocking points out that the risk of meningioma (another type of brain tumor) is hardly raised at all (OR=1.14). He writes: "If recall bias is the true explanation for the increased risk of glioma, it should similarly have affected the meningioma group, but it has not. Therefore, the increased risk in the glioma group may be a true finding."

February 15, 2008

If anyone is still not convinced that the completed Interphone study should be released as soon as possible (see our January 30 post), they need look no further than how the Interphone results from Japan were handled last week.

November 29, 2006

Japanese researchers do not see an increase in acoustic neuroma among users of mobile phones. In a paper appearing in the December issue of Occupational and Environmental Medicine, a team led by Naohito Yamaguchi of the Tokyo Women's Medical University reports that the "risk of acoustic neuroma did not increase with the duration of mobile phone use, nor with the total call time."

July 11, 2006

Magnetic fields have been linked to childhood cancer in many countries and now it's also been shown in Japan. Michinori Kabuto, of the National Institute of Environmental Studies in Ibaraki, along with a number of collaborators have found that children exposed to 4 mG (0.4 µT) or more in their bedrooms had close to five times more leukemia than those living in low-exposure homes. This statistically significant finding appears in the August 1st issue of the International Journal of Cancer.

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