Proposal of a recommender system simulator based on a small-world model. - Ryosuke Saga; Kouki Okamoto; Hiroshi Tsuji; Kazunori Matsumoto (Artif. Life Robotics, 2011)

Robot-human handover based on position and posture of human hand. - Futoshi Kobayashi; Kouki Okamoto; Fumio Kojima (SCIS&ISIS, 2014)