The 2026 Special Research Project Fund supported the continuation and consolidation of my research on legal mobilization, nuclear governance, and environmental justice in Japan, with a particular focus on the Rokkasho nuclear fuel cycle complex in Aomori Prefecture. The project builds on long-term empirical fieldwork, including courtroom observations of the ongoing litigation against the Rokkasho reprocessing plant, as well as interviews with lawyers, plaintiffs, and stakeholders involved in the mobilization. During this funding period, my primary objective was to systematize and analyze the extensive qualitative data collected over several years. This included detailed notes from court hearings, legal arguments developed by the plaintiffs, and evolving regulatory responses following the post-Fukushima reform of nuclear safety standards. Particular attention was given to how legal actors frame technological uncertainty, intergenerational risk, and institutional responsibility within the litigation process. The research has resulted in the submission and acceptance of three articles and one book chapter, which together advance a coherent analytical framework at the intersection of socio-legal studies and science and technology studies. These publications examine the Rokkasho case from complementary perspectives: (1) as a form of strategic litigation challenging the legitimacy of Japan’s closed nuclear fuel cycle and raising questions of intergenerational justice; (2) as a site of “civic epistemology,” where courts become arenas for negotiating the credibility and authority of scientific expertise; and (3) as an example of how uncertain science and contested regulatory norms are translated into legal claims and judicial reasoning in the post-Fukushima context.