Masashi Tanaka is an Associate Professor in the Faculty of Letters, Arts and Sciences at Waseda University. He earned his bachelor’s degree in Faculty of Letters (April 2006–Mar 2008), the Master’s degree in Graduate School of Humanities and Sociology (April 2008–Mar 2010) and Ph.D. in Psychology, Graduate School of Humanities and Sociology all at the University of Tokyo. His current work focuses on songbirds, birdsong, oscine, Passeri, oscines, birds, auditions, rewards, emotions, communication, electrophysiology, neurophysiology and neural circuits.