1. T. Kikkawa, “The Tokyo Electric Light Company’s ‘Sloppy Management’ and its Consequences,” M. Udagawa, S. Sasaki, and M. Yotsumiya (Eds.), “Business History of Failures and Revitalization,” pp. 80-81, Yuhikaku Publishing, 2005 (in Japanese).
2. The Tokyo Electric Light Company (Ed.), “First 50-Year History of the Tokyo Electric Light Company, Inc.,” The Tokyo Electric Light Company, 1936 (in Japanese).
3. Committee for the History of the Tokyo Electric Light Company (Ed.), “History of the Tokyo Electric Light Company, Inc.,” The Tokyo Electric Light Company, 1956 (in Japanese).
4. Tokyo Electric Power Company, “Electric Power Industry in Kanto and Tokyo Electric Power Company: 50-Year Trajectory of Tokyo Electric Power Company from Foundation of its Electric Power Industry,” Tokyo Electric Power Company, 2002 (in Japanese).
5. H. Matsushima, “Historical Significance of Foreign Loans for Electric Power,” Socio-Economic History, Vol.26, No.2, pp. 399-438, 1960 (in Japanese), etc.