Development of a Robot for Evaluating Tennis Rackets. - Junji Furusho; Masamichi Sakaguchi; Naoyuki Takesue; Fuminobu Sato; Takeshi Naruo; Hiroshi Nagao (J. Robotics Mechatronics, 2001)

Skill grouping method: Mining and clustering skill differences from body movement BigData. - Shinichi Yamagiwa; Yoshinobu Kawahara; Noriyuki Tabuchi; Yoshinobu Watanabe; Takeshi Naruo (IEEE BigData, 2015)