Saiwai Clinic is a general medical facility specializing in internal medicine, pediatrics, and smoking cessation, located in Nishi-Aoki, Kawaguchi City, Saitama Prefecture. The clinic emphasizes preventive medicine and is equipped with a health screening department and upper gastrointestinal endoscopy services. Operating by appointment system, morning consultations are available Monday through Saturday from 8:40 to 11:30, afternoon consultations on Tuesday through Friday from 14:00 to 16:30, and evening consultations on Monday, Wednesday, and Thursday from 18:00 to 20:00. The clinic is closed on Sundays, holidays, and during the New Year period (December 30 to January 3). Serving as a local healthcare hub, the facility also offers home visit services (contract basis), nutritional counseling by physician referral, and specific health guidance following health screening results. Outpatient services are provided by a two-doctor system with rotating physicians. The clinic features on-site parking and barrier-free accessibility. Payment methods include credit cards and electronic payment, with English language services available. A dedicated phone line for health screening inquiries operates separately from general outpatient services.