Katsuhito Iwai (岩井 克人, Iwai Katsuhito?, born February 13, 1947) is a Japanese economist and critic. He has studied the theory of money, macro dynamics, evolutionary economics, philosophy of corporation, fiduciary law, and history of social thoughts. His work includes the book, Disequilibrium Dynamics (Yale University Press, 1981), and many articles published in academic journals. He has also written many books and articles in newspapers and magazines for the general public on a wide array of subjects ranging from global capitalism, post-modernity, civil society, money and language to literature and movies. His keen observations and surprising analysis of the work by Shakespeare, Marx, J. S. G. Boggs, Ihara Saikaku have established him as one of the foremost essayists in Japan.