Analysis of information flow in Japan

This paper analyzes the volume of information flow in Japan which is carried by the various media. New statistics were compiled in order to understand the volume of information flow. A new integrated indicator which enables us to compare each of the media with other is composed. This is represented by the unit of ‘word’. The volume of supply of information and the volume of consumption were distinguished. The change of relationship between the supply and the consumption of information was examined by means of time series analysis of the volume of information flow in correlation to the economic and societal indicators. The costs of information flow were estimated. By estimating the distribution cost of the information, it was possible not only to understand the total cost to society for the circulation of information, but also to compare the efficiency of the media by comparing the unit cost of each medium, that is to say, the total cost divided by the total volume of information flow. Analysis of the actual state of information flow and positioning of the media were made in relation to the supply and consumption volume as well as cost of information flow.