Located in Kawada-cho, Shinjuku-ku, Marfan/Aorta/Heart Clinic Aomi Cardiovascular Surgery & Internal Medicine is Japan's first clinic specializing in the diagnosis and treatment of intractable diseases such as Marfan syndrome and related disorders, with a focus on aortic dissection and aortic aneurysm. Specialists with approximately 40 years of experience in Marfan syndrome provide care, and the clinic also handles general outpatient services for hypertension, arrhythmia, angina pectoris, myocardial infarction, heart failure, arteriosclerosis obliterans of the lower limbs, and varicose veins. Clinic hours are 9:30-12:00 and 13:30-17:00 on Monday, Wednesday, Friday, and Saturday (until 16:00 on Saturday afternoons), and the clinic is closed on Tuesday, Thursday, Sunday, and holidays. As a measure against hospital-acquired infections, the clinic operates on an appointment-only basis. Ultrasound examinations including cardiac aortic echocardiography, carotid artery echocardiography, and venous vascular echocardiography are regularly performed, and test results such as blood tests and echocardiography are explained on the same day. Diagnosis of Marfan syndrome takes approximately one hour with examination, X-ray, and echocardiography, and abdominal ultrasound is also available upon request. English services and barrier-free accessibility are also available.