Otsuka Clinic is a medical facility located in Yotsuya-Saneicho, Shinjuku, Tokyo, specializing in internal medicine and Kampo (Japanese herbal) treatment. Rooted in the heritage of a renowned Kampo medicine expert, the clinic provides treatment using herbal medicines based on traditional Kampo diagnostic methods. They address a wide range of conditions, from everyday ailments like headaches and cold sensitivity to difficult-to-treat diseases including autoimmune disorders and cancer, guided by their treatment principles: "not giving up," "not abandoning," and "staying with patients until the end." Kampo medicine aims to treat the "person" rather than the disease itself, with the characteristic approach of selecting the most suitable herbal medicine for each individual as a custom prescription after detailed medical history and examination. The clinic is staffed by Dr. Kenji Watanabe and Dr. Noriko Watanabe, both of whom have training experience at Stanford University and studied Kampo under Yasuo Otsuka. They treat daily discomforts felt at the "pre-disease" stage as treatment targets and incorporate an approach to enhance natural healing power using naturally derived herbal medicines. Outpatient services are available in English, and the clinic accepts credit cards and electronic payments, in addition to being equipped with parking and barrier-free facilities.