Masaru Ishii, M.D., Ph.D. was graduated from the Osaka University Medical School in 1998 and then worked as a physician specialized in rheumatology and internal medicine. He studied in the National Institutes of Health as a research fellow supported by the Human Frontier Science Program (2006-2008), as a laboratory chief in Osaka University Immunology Frontier Research Center (Associate Professor; 2008-2011, Professor; 2011-2013), and then appointed as a Professor/Chairman of the Department of Immunology and Cell Biology, Graduate School of Medicine Osaka University in 2013. He has also servesd as a Dean of Graduate School of Medicine since 2025. The bulk of his studies have so far elucidated the cellular dynamics in live bone tissues, by using intravital multiphoton-based bone imaging that he has originally developed. His study is currently covering diverse research topics where cells are dynamically moving, such as immune cell migration in inflammatory sites.