How are research data governed at Japanese repositories? A knowledge commons perspective. - Kai Nishikawa (Aslib J. Inf. Manag., 2020)

How and why are citations between disciplines made? A citation context analysis focusing on natural sciences and social sciences and humanities. - Kai Nishikawa (Scientometrics, 2023)

Correction: How and why are citations between disciplines made? A citation context analysis focusing on natural sciences and social sciences and humanities. - Kai Nishikawa (Scientometrics, 2023)

Does Open Access Foster Interdisciplinary Citation? Decomposing Open Access Citation Advantage. - Kai Nishikawa; Akiyoshi Murakami (CoRR, 2024)

Exploring the applicability of large language models to citation context analysis. - Kai Nishikawa; Hitoshi Koshiba (Scientometrics, 2024)

Does open access foster interdisciplinary citations? Decomposing open access citation advantage. - Kai Nishikawa; Akiyoshi Murakami (Scientometrics, 2025)