On January 13, 2023, Prof. Xiao Su, an Assistant Professor at the University of Illinois Urbana-Champaign, visited the Ouchi Laboratory. He visited the laboratories of Prof. Tsuyoshi Minami, Prof. Teruyasu Mizoguchi, Prof. Shunsuke Yagi, and Prof. Toru H. Okabe. Afterward, Prof. Xiao Su gave a lecture to graduate students titled “Redox-mediated electrochemical separation as a sustainable pathway for critical element recovery, materials recycling, and waste valorization.” The lecture sparked numerous questions from the graduate students, leading to a fruitful discussion. Afterward, IIS faculty members gathered for a convivial exchange of opinions and in depth discussions with Prof. Xiao Su on a wide range of topics.