Aoki, Hidekazu, and Nobuo Kawamiya. 2018. “The Business Structure of Japan’s Electric Industry for 1963-2016: Analysis on the Revenues and Expenditures Throughout before and After the ‘Deregulation’”. International Journal of Energy Economics and Policy 9 (1):316-25. https://www.econjournals.com/index.php/ijeep/article/view/6999.