Yotsuya Kawasoe Obstetrics and Gynecology is an obstetrics and gynecology clinic located in Samon-cho, Shinjuku-ku, Tokyo. The clinic was established in 1935 by the first professor of the Department of Obstetrics and Gynecology at Keio University School of Medicine, and has a history of over 80 years. It is characterized as an obstetrics and gynecology clinic in the city center within the Yamanote Line that handles hospitalization, childbirth, and abortion procedures. The facility provides community-based healthcare services for patients from adolescence to the elderly. The clinic adopts a policy to support safe natural childbirth and the start of child-rearing, supporting women's lifelong health management. They provide careful medical care and treatment for concerns from adolescence to menopause and post-menopausal periods. The clinic offers services in English and accepts credit cards, debit cards, and electronic payments. Appointments are not required; first-time patients can walk in anytime.