A virtual optical disk method to realize rewritability and revision control on a write-once optical disk. - Takashi Yokozeki; Mitarou Namiki; Masaki Nakagawa; Nobumasa Takahashi (Syst. Comput. Jpn., 1990)

A System for Real-time Groupware Using a Pen Interface for Creative Thought Support. - Kazuaki Nakajima; Eiichi Hayakawa; Mitarou Namiki; Nobumasa Takahashi (HCI (2), 1997)