N.K. Clinic, a medical corporation of Shunkukai, is a clinic specializing in internal medicine, located just a 3-minute walk from Ayase Station West Exit on the Tokyo Metro Chiyoda Line. The clinic has specialized in preventive medicine for half a century, focusing on early detection and treatment of diseases. In April 2017, the facility was renovated and expanded, featuring a comfortable space and the latest medical equipment. Notable features include an automatic reception system for speedy health checkups and an automatic reading system for test results. The clinic offers a wide range of health screening programs, including comprehensive health checkups, brain screenings, lung screenings, breast cancer screenings, cervical cancer screenings, and gastroscopy. They also conduct facility-based and mobile health checkups. With the motto of "Kindness, Care, and Reliability," the clinic offers services tailored to patient needs, such as Ladies' Days. In addition to barrier-free access, the clinic accepts credit cards and electronic payments, and provides medical services in English.