Books

• Hirotaka Watanabe, ed., A History of Space Research, Development and Utilization: How has Japan tackled them? Osaka University Press, 2022 (in Japanese).

Papers

• 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.
• Tomoya Sano, Katsuhiko Toyama, Takahiro Komamizu, Tomoko Masuda, "Construction of Law Database for History Information," Journal of the Japan Society for Digital Archive, Vol. 7, No. s2, pp. s142-s145, November 2023 (in Japanese).
• Hirotaka Watanabe, "The Space Policy of the Johnson Administration: Project Apollo and International Cooperation," Osaka Law Review, Vol. 71. No. 3-4, pp. 297-338, November 2021 (in Japanese).

Presentations

• Tomoya Sano, Katsuhiko Toyama, Takahiro Komamizu, Tomoko Masuda, "Construction of Law Database for Continual Analysis of Ever-changing Japanese Law," 23rd Information Network Law Association Japan Conference, Chiyoda, Tokyo, Japan, 10 December 2023 (in Japanese).
• Takuya Maeshiro, "How did Japan Install Okinawa Radiowave Tracking Base under the US Military Administration?," 65th Lecture Meeting of Space Science and Technology Association (Ukaren), Toyama, Toyama, Japan, 20 October 2023 (in Japanese).
• 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.
• Tomoya Sano, Katsuhiko Toyama, Tomoko Masuda, "Proposal of a Legal Standard XML Schema Based on Modern Japanese Acts and Imperial Orders," Journal of the Japan Society for Digital Archives, Vol. 6, No. 3, pp. 226-229, November 2022 (in Japanese).
• Takahiro Komamizu, Katsuhiko Toyama, Nobuo Kawaguchi, Tomoya Sano, "Towards Mobility-related Law Search by Utilizing Relationship between Laws," Technical Reports, Special Interest Group on Semantic Web and Ontology, Japanese Society for Artificial Intelligence, Vol. 2022, No. SWO-057, pp. 04-1-04-10, 5 August 2022 (in Japanese).
• 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.
• Hirotaka Watanabe, "A History of Space Research, Development and Utilization: Japan and the United States," 65th Lecture Meeting of Space Science and Technology Association (Ukaren), all-online, 12 November 2021 (in Japanese).

International Meetings

• "From Competition to Cooperation: The Evolution of U.S.-Russian Space Relations," Guest Speaker: Prof. John M. Logsdon, George Washington University, U.S.A, 9 February 2023, online (Zoom, English-Japanese consecutive interpretation).
• "Space Activities and Space Business in Ukraine," Guest Speaker: Prof. Nataliia Malysheva, Institute of State and Law named after Volodymyr Koretsky, Ukrainian National Academy of Sciences, 27 September 2022, online (Zoom, English).

Misc.

• Katsuhiko Toyama, "Text-Mining of Official Gazette," User's Voices of the Official Gazette, National Printing Bureau, Japan, 11 October 2022 (in Japanese).
• Fiscal 2020 Award of Excellence of Special Interests Groups, Japanese Society for Artificial Intelligence, to Takahiro Komamizu, Yasuhiro Ogawa, Katsuhiko Toyama, "Identifying Legal Entities in DBpedia for Statute History LOD," Technical Reports, Special Interest Group on Semantic Web and Ontolgy, Japanese Society for Artificial Intelligence, Vol. 2020, No. SWO-051, pp. 06-1-06-10, 14 July 2020 (in Japanese).