Raison D'etre Object: A Cyber-Hearth That Catalyzes Face-to-Face Informal Communication. - Takashi Matsubara 003; Kozo Sugiyama; Kazushi Nishimoto (EDCIS, 2002)

Evaluation of the IRORI: A Cyber-Space that Catalyzes Face-to-Face Informal Communication. - Masao Usuki; Kozo Sugiyama; Kazushi Nishimoto; Takashi Matsubara 003 (KES, 2004)

Touch Detection System for Various Surfaces Using Shadow of Finger. - Takehiro Niikura; Takashi Matsubara 003; Naoki Mori (ISS, 2016)

Touch detection method for non-display surface using multiple shadows of finger. - Takashi Matsubara 003; Naoki Mori; Takehiro Niikura; Shun'ichi Tano (GCCE, 2017)