I found this interesting article on J-cast. According to the article a research survey made by the Rakuten company found that 53% of Japanese man and women in their 40's "seldom read books". When participants in their 30's were asked the results showed that 52% of the women and 47% of the man don't read. To top it all it seems this phenomenon has been on the rise for quite a few years now.
You can read the article here:
http://www.j-cast.com/2009/10/26052524.html
The reason for this strange phenomena was not written in the article. But since this is SanCom I'm sure one of you will be kind enough to grant an appropriate answer...

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