U Yanagi is a professor at the School of Architecture, Kogakuin University in Japan. He is also a visiting researcher of National Institute of Public Health (NIPH), Japan, and a fellow researcher at the Institute of Industrial Science, University of Tokyo. Yanagi was the chief of the Building Hygiene Section of the National Institute of Public Health, Japan. His specialty is elucidating the actual state of microbial pollution in the building environment and its countermeasures. His latest research has focused on the pollution mechanisms of microbial contamination and microbiome in built environments, such as hospitals, buildings, and welfare facilities for the elderly. He has published 63 books, 115 journal papers, 140 review articles in domestic academic journals, 111 international conference papers, and 585 domestic conference papers. He has received research grants from the Japanese government of 10 as PI and 25 as co-PI. Education: The University of Tokyo, PhD, 2015; NIPH, D.P.H., 1996.