Located in Koisawa, Isawa-cho, Fuefuki City, Yamanashi Prefecture, Nagasaka Clinic primarily provides internal medicine services as a local family doctor. Their official website indicates support for obstetrics and gynecology as well as pediatrics. Monday, Wednesday, and Friday offer morning consultations from 9:00 to 12:00, with afternoon hours from 15:00 to 18:00 on the same days. Saturday consultations are available from 9:00 to 12:00, with vaccination appointments by reservation from 14:00 to 15:00. The clinic is generally closed on Thursdays and Sundays; the 1st through 5th Thursdays and Sundays, as well as holidays and specific year-end/New Year dates, are also non-clinic days. They offer English language support, and their facility environment is designed with users in mind, accepting credit cards and electronic payments, providing parking, and featuring barrier-free accessibility. Remote consultations are offered on Saturdays and Sundays from 18:00 to 19:00 for patients with ongoing prescriptions.