Yukinori Harada is a senior assistant professor working at the department of Diagnostic and Generalist Medicine, Dokkyo Medical University in Japan. After finishing residency of internal medicine, He worked as a research fellow at Deutsches Herzzentrum München for one year, where he published 6 original research articles and 3 editorial articles as a first author and more than 10 research articles as a coauthor. From 2016, He has been working as an attending physician and a clinical researcher. As a physician, he usually sees referred patients with undiagnosed diseases. He has published over 40 peer-reviewed case reports about challenging diagnoses during this period. He is also the co-chair of the Diagnostic Excellence Working Group in the Japanese Society of General Hospital Medicine from 2021, contributing to improving medical professionals' awareness of diagnostic errors in Japan. He has much experience in developing ideas for implementing new concepts and theories about diagnostic safety into daily clinical practices through organizing workshops about hot topics in the fields of diagnostic safety (e.g., Safety II, diagnostic uncertainty, reflection and feedback of diagnostic errors, Interprofessional collaboration for diagnostic excellence) at Japanese national congresses. As a researcher, he has been focusing on enhancing the utility of artificial intelligence-based automated medical history-taking systems with the differential diagnostic generator to improve diagnostic accuracy in outpatients with new diagnostic problems. Recently, he is also extending research activities to the themes of the diagnostic contribution of generalists, ideal diagnostic consultative medicine, and atypical presentation.