Shinichi Takagawa, Kenji Takahashi, Tadashi Sano, Masanori Kyo, Yoshio Mori, Toshiyuki Nakanishi; 6, 500m Deep Manned Research Submersible "SHINKAI 6500" System, Proceedings of MTS/IEEE OCEANS'89 Conference, pp. 741 - 746, September 1989.
Toshiyuki Nakanishi, Shinichi Takagawa, Toshio Tsuchiya, Yasutaka Amitani; Japanese 6,500M Deep Manned Research Submersible Project, Proceedings of MTS/IEEE OCEANS'86 Conference, pp. 1438 - 1442, September 1986.
Shinichi Takagawa, Yukinobu Hamada; Japanese 2,000M Deep Submergence Research Vehicle "SHINKAI 2000" System, Proceedings of MTS/IEEE OCEANS'81 Conference, pp. 1155 - 1159, September 1981.