Picture: Books piled up in Japanese house
"..the domestic market for devices such as e-readers, personal computers and smartphones was only about 7.5 billion yen in fiscal 2010."
Source: Rakuten eyes cheaper e-readers / Lower-priced devices may help boost domestic e-book sales
Michihiro Kawashima
Yomiuri Shimbun Staff Writer
Jan. 17, 2012
http://www.yomiuri.co.jp/dy/business/T120116005002.htm