A humanoid in company with children. - Hideki Kozima; Cocoro Nakagawa; Nobuyuki Kawai; Daisuke Kosugi; Yoshio Yano (Humanoids, 2004)

Can a robot empathize with people? - Hideki Kozima; Cocoro Nakagawa; Hiroyuki Yano (Artif. Life Robotics, 2004)

Designing and observing human-robot interactions for the study of social development and its disorders. - Hideki Kozima; Cocoro Nakagawa; Yuriko Yasuda (CIRA, 2005)

Interactive robots for communication-care: a case-study in autism therapy. - Hideki Kozima; Cocoro Nakagawa; Yuriko Yasuda (RO-MAN, 2005)

Longitudinal Child-Robot Interaction at Preschool. - Hideki Kozima; Cocoro Nakagawa (AAAI Spring Symposium: Multidisciplinary Collaboration for Socially Assistive Robotics, 2007)

A robot in a playroom with preschool children: Longitudinal field practice. - Hideki Kozima; Cocoro Nakagawa (RO-MAN, 2007)

Social interaction facilitated by a minimally-designed robot: Findings from longitudinal therapeutic practices for autistic children. - Hideki Kozima; Yuriko Yasuda; Cocoro Nakagawa (RO-MAN, 2007)

Keepon. - Hideki Kozima; Marek P. Michalowski; Cocoro Nakagawa (Int. J. Soc. Robotics, 2009)