Moo-pong. - Yusuke Wada; Jun Usui; Daisuke Uriu; Naohito Okude (SIGGRAPH Emerging Technologies, 2005)

Paravie: dance entertainment system for everyone to express oneself with movement. - Jun Usui; Hirotaka Hatayama; Takashi Sato; Yumi Furuoka; Naohito Okude (Advances in Computer Entertainment Technology, 2006)

Quatronome: a stomp box for jam session with movies. - Jun Usui; Hirotaka Hatayama; Naohito Okude (Advances in Computer Entertainment Technology, 2007)