He obtained his Ph.D.degree in 1990 from Sapporo Medical University. From 1991-1993, he then joined Professor Peter J Barnes's laboratory in National Heart and Lung Institute (London) as postdoctoral fellow to work on PAF receptor in human lung. After that, he returned to Sapporo Medical University as ENT doctor. Since 2002, he has been the international member of American Academy of Allergy Asthma and Immunology (AAAAI). He received the prize of Japan Rhinologic Society in 2005 and the outstanding abstract awards of 2012 World Allergy Organization (WAO) International Scientific Conference. His research interests include the roles of chemical mediators in allergic airway diseases.