Professor of Philosophy at the London School of Economics. He is the author of Libertarianism without Inequality (OUP 2003) plus a number of articles in journals such as Philosophy & Public Affairs and Ethics, mainly on topics in normative ethics and distributive justice. His current research interests encompass prioritarianism, egalitarianism, and the separateness of persons; collective goods and the benefits of cooperation; risk-pooling, pensions, and insurance; the fairness and value of risks and chances of benefits; property ownership and the nature of money; and left-libertarianism versus social democracy and socialism. The focus of his teaching is on philosophy and public policy as well as moral and political philosophy. He posts blogs on Medium on issues related to public policy -- mainly on pensions but also on health insurance, the measure of inflation, and the funding of higher education. For the impact of his pensions blogs, Otsuka was ranked #23 of 50, alongside Vice Chancellors, Ministers of State, and top civil servants, on the ‘UK Higher Education Power List’ 2018 of those who had the most influence on this higher education sector that year. According to the assessors: “Pension schemes are complex beasts, with a large number of nested assumptions. So it takes a skilled philosopher to unpick the logic and follow the trails of meaning to their inherent contradictions. In Michael, USS actuaries found a formidable opponent, and it is no exaggeration to say his blog posts changed the course of the dispute.”