Yu Takeuchi is Associate Professor of Space Law and Director of the Space Law Research Center at Keio University, Japan. Before resuming this position, he served for 18 years at the Japan Aerospace Exploration Agency (JAXA) as a legal expert. His latest work includes Commercial Space Activities and International Law (Shinzansha, 2025), in Japanese. The CV is available at: https://researchmap.jp/takeuchi.yu