On behalf of the Local Organizing Committee of the 19th International HLA & Immunogenetics Workshop (IHIWS), we are pleased to invite you to Numazu, Shizuoka Prefecture, Japan, from 19 to 24 May, 2026. The 19th IHIWS will be an exciting opportunity for experts in the field of human leukocyte antigen (HLA) and immunogenetics to come together to discuss the latest research and advancements in the field. This event will bring together researchers, clinicians, and industry professionals from around the world to share their experiences, insights, and knowledge, and we believe that your presence will be valuable to the success of the conference.