This book is a non-fiction collection of untold stories about the kingmakers who wielded influence in Japan's political, bureaucratic, and financial circles during the Showa, Heisei, and Reiwa eras. Titled "Japan's Kingmakers: The Untold Stories," it unearths the "underground currents" of power structures and slush funds from the era of Kakuei Tanaka to the present day, using new materials and information. Content: It depicts, with anecdotes and secret records, the networks and financial connections of the fixers who are said to have secretly controlled Japan's power structure from the golden age of Kakuei Tanaka. Authors: Written by top-class non-fiction writers and journalists, it contains over 600 pages of manuscript, equivalent to two new books. Purpose: To reveal the history of the "underground currents" of politics, economics, crime, and violence, and the "monsters" who moved them, and to pursue the "present state" of modern Japan. A fixer is a person who has the means and connections to influence decisions in political, administrative, and corporate profit-making activities without going through the proper procedures.