Foreword. - Koji Nakajima; Masaki Sano; Yoshinori Hayakawa (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2002)

Robust feedforward track following control system for an optical disk drive system. - Kiyoshi Ohishi; Yoshinori Hayakawa; Hitoslii Yanagisawa; Daiichi Koide; Haruki Tokumaru (ACC, 2003)

Collective Motion and Formation of Simple Interacting Robots. - Ken Sugawara; Hiroumi Tanigawa; Kazuhiro Kosuge; Yoshinori Hayakawa; Tsuyoshi Mizuguchi; Masaki Sano (IROS, 2006)

Reinforcement learning of recurrent neural network for temporal coding. - Daichi Kimura; Yoshinori Hayakawa (Neurocomputing, 2008)

Hypothesis of Piezoelectricity of Inner Core As the Origin of Geomagnetism. - Yoshinori Hayakawa (Data Sci. J., 2009)