The Division of Rheumatic Diseases in Department of Orthopaedic Surgery. We are conducting leading basic and clinical research on rheumatic diseases as a team comprising Associate Professor Miura, the head of the Division of Rheumatic Diseases in Department of Orthopaedic Surgery; Dr. Hayashi; Dr. Maeda; and Dr. Takashima. Our basic research focuses on the proliferation mechanism of synovial tissues, which serve as a site for inflammation in rheumatoid arthritis. In clinical research, we actively provide patients with medical treatment such as biologics and appropriately analyze the therapeutic effect of the intervention. In addition, our institution strives to find out the clinical state of rheumatoid arthritis in several global multi-institutional joint studies such as the CORRECT study and the ANSWER cohort study. Furthermore, research on stress management and patient education is being performed in collaboration with medical staff such as nurses and physical therapists. We are able to not only provide extensive medical treatments for rheumatic diseases but also perform basic research not limited to the field of orthopedic surgery.