JWC Jinnai Women's Clinic, located in Okusawa, Setagaya-ku, Tokyo, is a women's clinic accessible from the south exit of Jiyugaoka Station on the Tokyu Toyoko and Tokyu Oimachi Lines. The clinic primarily specializes in gynecology, offering Saturday afternoon and Sunday morning appointments to accommodate patients with difficulty attending on weekdays. Tuesday, Wednesday, and Friday from 15:30 to 17:00 are designated times when patients with secondary infertility can visit, and the clinic has an environment designed to accommodate patients bringing children. Male infertility outpatient services are available twice a month, on Wednesday or Saturday afternoons and Sunday mornings. As of 2024, the clinic has published its positive pregnancy test rate for frozen-thawed embryo transfers in patients under 40. The clinic has robust support systems for assisted reproductive technology, with certified IVF coordinators providing treatment selection support tailored to patients' concerns, and free consultations offered by qualified reproductive medicine counselors. The clinic interior emphasizes a café-like atmosphere, with magazines and supplement information related to fertility treatment on display, and workspaces available. A half-price support system applies to self-pay treatments for patients who previously underwent assisted reproductive technology at the clinic. Payment methods include credit cards, debit cards, and electronic payments, and barrier-free access is fully equipped. English-language service is available. The clinic director, Dr. Hikoshi Jinnai, is a board-certified obstetrician and gynecologist who graduated from Chiba University School of Medicine and served as a research fellow in reproductive endocrinology at Albert Einstein College of Medicine in New York. The clinic is closed on Mondays and holidays.