Hello! I am a postdoctoral researcher at the Institute of Science Tokyo, under Prof. Naoaki Okazaki. My research aims to develop principles and methods for building and ensuring Trustworthy AI systems, with a particular focus on safety and privacy. My current work focuses on membership inference attacks, AI-generated text detection, jailbreak defense, and reliable LLM-as-a-judge. My work has been published in top-tier conferences such as ACL, EMNLP, and AAAI, and I have led multiple collaborative projects with Prof. Chris Callison-Burch (UPenn) and Prof. Preslav Nakov (MBZUAI).
- Personal website: https://ryuryukke.github.io/
- Twitter: @sponddd
- email: ryuto.koike[at]nlp.comp.isct.ac.jp


