The typical power structure in each of Japan's 47 prefectures is an "iron triangle" composed of the prefectural government, regional banks and local newspapers. Beneath this triangle are groups of corporations, such as general contractors, that are linked to politicians.
It is noteworthy that, except in Hokkaido and Okinawa, the regional electric company transcends this powerful triangle because it monopolizes the power supply in two or more prefectures. For example, Tohoku Electric Power Co. covers seven prefectures in northeastern Japan, and even Hokuriku Electric Power Co., with sales of less than ¥500 billion a year, serves three prefectures. This fact has led the utilities to think that they are above the prefectural governments.