The Research Center of Socionetwork Strategies, RCSS, at Kansai University has been compiling the data of information system investment of Japanese banks by the mail-in questionnaires and answers since 1995. The statistical analyses of RCSS were quite opposite to the popular propositions concerning to information technology revolution over Japanese banking systems. The statistical approach of panel date analyses is very new for the economists of banking industry. The authors will be the pioneers of this field. The researcher of Information technology all over the world will be shocked with this book.