To read books for lower cost
I read books mainly from public library by internet reservation system, and sometimes buy books (mainly used books because there are many used bookstore aroud japan) or buy e-books which are not sold in japan or are cheaper compared with translation version. Internet services including internet accessibility is very cheap & sufficient (for example my mobile phone with internet cost about 10 $ per month). So if we memo titles of books which we had lent & read . we don't have to own books by myself. Of course, I want to buy books if these are mine, I can write down memo on books or fold down corner of pages. But for many ordinally people, there are limit of allowance for family so using public library services plus IT is very good way for book lover.