Located in Hamadayama, Suginami Ward, Aihoukai Hamadayama Hospital specializes in spine and joint treatments, performing over 2,045 surgeries annually. The hospital emphasizes personalized treatment, providing patient-centered care tailored to each individual. Specialized treatments include rotational acetabular osteotomy, reverse total shoulder arthroplasty, and navigated knee and hip replacement surgery. The hospital also performs arthroscopic sports orthopedic surgery and rheumatoid arthritis surgery. Advanced treatments include spine surgery with neuromonitoring, balloon kyphoplasty for thoracolumbar compression fractures, and PRP therapy using autologous blood. Brain checkups and dementia and stroke clinics are held on Saturday mornings, with specialized care provided by former professors at St. Marianna University School of Medicine and former chiefs of neurosurgery at Saiseikai Central Hospital. The hospital is barrier-free with parking facilities, offers English services, and operates two satellite clinics.