Souichirou Kozuka, "National Space Law and Licensing of Commercial Space Activities in Japan," in Lesley Jane Smith, Ingo Baumann, Susan-Gale Wintermuth eds., Routledge Handbook of Commercial Space Law, pp.119-132, Routledge, 2023.
Souichirou Kozuka, Aika Umemiya, "Formation of Japan's Space Law," 34th International Symposium on Space Technology and Science (ISTS), Kurume, Fukuoka, Japan, 6 June 2023.
Hirotaka Watanabe, "Japan's Space Policy and the End of the Cold War: To Strengthen the Japan-U.S. Alliance," 34th International Symposium on Space Technology and Science (ISTS), Kurume, Fukuoka, Japan, 6 June 2023.
Hirotaka Watanabe, "The Evolution of Japan's Space Policy and Organizations: Domestic, Diplomatic and Security Challenges," 33rd International Symposium on Space Technology and Science (ISTS), Beppu, Oita, Japan, all-online, 1 March 2022.