Kusumoto Internal Medicine Clinic, located in Kogashimacho, Omura City, Nagasaki Prefecture, is a medical facility specializing in internal medicine. Operated by Medical Corporation Hakuseikai, the clinic is led by Dr. Hideyuki Arai, who became a physician in 1999 and has worked in nephrology and dialysis care at multiple hospitals in Nagasaki Prefecture, including Nagasaki University Hospital and Isahaya General Hospital. Dr. Arai holds a Doctor of Medicine degree and has obtained specialist certifications from the Japanese Society of Internal Medicine (General Internal Medicine Specialist), Japanese Society of Nephrology, Japanese Society for Dialysis Therapy, and Japanese Geriatrics Society. Clinic hours are 9:00 AM to 12:30 PM in the morning and 2:00 PM to 6:00 PM in the afternoon, with closures on Sundays, holidays, Golden Week, Obon, and year-end/New Year holidays. The clinic also provides dialysis treatment, with the second session start time changed to 1:00 PM from January 2025. Facilities include a parking lot and barrier-free accessibility. Payment methods include credit cards and electronic payments, and English-language assistance is available.