•        Present Position: Emeritus professor, Shimane University,

•        Professor and chairman (1994-2020)

•        at Department of Otorhinolaryngology, Shimane University, Faculty of Medicine, Izumo city, Japan

•        Chairman, The board of directors, The Japanese Rhinologic Society (2013~2019. Oct.)

•        Board member, International Rhinologic Society (2013~present),

•        Honorary member, European Rhinologic Society, Italian Rhinologic Society, Bulgarian Rhinologic Society  

•        Yamaguchi University College of Medicine, Yamaguchi, Japan, MD, 1979

•        The Postgraduate course, Dept. of Immunology, Institute for Bioregulation Research, Kyushu University, Fukuoka, Japan, DMSc, 1983

•        Assistant professor, Oita Medical University, Oita, Japan 1984-1994

•        Visiting research fellow, Ohio State University, Otological Research Laboratory, 1986–1988