Located in Ashiya-machi, Onga-gun, Fukuoka Prefecture, Seiwakai Clinic is a local medical facility specializing in internal medicine. Dr. Takao Sadayasu handles general internal medicine and cardiology, while Dr. Rin Yokomizo covers general internal medicine and nephrology, providing specialized care for cardiovascular and kidney diseases. As Dr. Yokomizo is a female physician, the clinic can accommodate female patients who prefer to be treated by a female doctor. Consultation hours are Monday, Tuesday, Wednesday, and Friday from 9:00 AM to 6:00 PM, and Thursday and Saturday from 9:00 AM to 12:30 PM. The clinic is closed on Sundays, public holidays, New Year's, and Obon periods. The clinic offers a wide range of examinations including urinalysis, blood chemistry tests, X-rays, ultrasound, electrocardiograms, Holter monitoring, pulmonary function tests, and bone density measurements. As a certified home care support clinic, it collaborates with affiliated medical institutions such as Ashiya Chuo Hospital, Onga Nakanishi Medical Association Hospital, and Fukuoka Shin-Mizumaki Hospital to provide home medical care support. The clinic accepts My Number health insurance cards and works to ensure safe healthcare by preventing duplicate prescriptions. The facility has parking, is wheelchair accessible, and accepts credit cards and electronic payments. English language support is also available.