Located in Kasugamachi, Yamagata City, Yamagata Prefecture, Josai Hospital has served as a family doctor in the community since its establishment in 1970. The director, a medical doctor from Hokkaido University's Department of Cardiovascular Medicine, holds dual certifications as a specialist in General Internal Medicine (Japan Society of Internal Medicine) and Cardiovascular Medicine (Japanese Circulation Society). The clinic provides comprehensive care ranging from lifestyle disease management (hypertension, diabetes, dyslipidemia) to cardiovascular, respiratory, and gastrointestinal diseases. The hospital is equipped with advanced diagnostic equipment including CT, high-definition endoscopy (including transnasal), echocardiography, Holter ECG, 24-hour blood pressure monitoring, and sleep apnea testing, enabling complete in-house diagnosis. Services include individual nutritional counseling by registered dietitians, smoking cessation clinic, and home-visit medical care, serving patients from children to the elderly as a dedicated home doctor. English consultation is available, and the clinic accepts credit cards and electronic payments. Parking and barrier-free facilities are provided. Weekday consultations are held in morning and afternoon sessions, while Wednesdays and Saturdays are morning-only appointments.