Historian and author. Born in Osaka on October 29, 1958. Graduated from the Department of History, Faculty of Letters, Nara University, in 1981. After pursuing an academic career, he became a research fellow at the Faculty of Letters, Nara University, in 1984. He currently works as a historian and author, producing works based on his distinctive view of history. He also serves as a lecturer for organizations including the Association for Research on Domestic and International Affairs, the Local Government Finance and Administration Research Association, the Political and Economic Forum, and the Small and Medium Enterprise University.