Bank’s Personnel Networks Through Interlocking Directorates of Members of the Supervisory Board on Such Top Management Organs of Other Enterprises in the Latter Half of the 2010s: Cases of Deutsche Bank and Commerzbank

Based on the results of the conditions in the late 1960s as the period after the enactment of the 1965 Corporations Law that regulated the limitation of the number in which one person might have mandates on the supervisory board in Chap. 9 , this chapter considers the personnel networks of the two largest banks, including the second- and third-party companies, in the latter half of the 2010s using the methods of social network analysis and compares the network of each bank. Following the 1990s, such a system of interfirm relationships, including the relationship between bank and industrial enterprise, has undergone significant change as a result of various factors such as globalization of the economy and enterprise, internationalization of the financial market and the resulting changes in company financing conditions, and transformation of bank behavior, as seen in the shift from credit bank to investment bank business. This chapter analyzes the “cohesiveness” of the networks of each bank that indicates the characteristics of the network as a whole and “centrality” explaining enterprise which plays an important role in the network’s information flow and media, as well as the industrial sector to which such an enterprise belonged. These discussions help to clarify the changes to each bank’s network.