Abstract
Since foreign magazines increases continued in recent years, the subscription magazine has decreased sharply. As the breakthrough, the subscription stop of the print products is carried out, an electronic journal is introduced, and it is striving for efficient use of information. However, an electronic journal also having a price increase every year, and switching it to method for obtaining of separates depending on future usage frequency is also assumed. About future utilization, there are many subjects also including utilization of open access, link resolver, etc.
