Hisao Matsumaru is currently Professor of Philosophy and Faculty of International Liberal Arts at the Dokkyo University in Soka, Saitama, where he has also served as Dean of the Faculty. He has also been a guest professor or held research fellow positions at Duisburg University, Germany, Cornell University, and École des Hautes Études en Sciences Sociales, Paris. He is currently President of Nishida Philosophy Association in Japan.Yoko Arisaka has been Associate Professor of Philosophy at the University of San Francisco until 2007. She has held research fellow positions at the UC Humanities Research Institute, École des Hautes Études en Sciences Sociales, Paris, and Forschungsinstitut für Philosophie Hannover, Germany. She is currently an adjunct professor at the Institute of Philosophy at the University of Hildesheim, Germany.