Shimoyama Dental Clinic, located in Hirosezawa-cho, Kiryu City, Gunma Prefecture, has been providing periodontal treatment-focused care since its establishment in July 1991. The clinic performs non-surgical treatments aimed at preserving natural teeth as long as possible, drawing on treatment methods from Sweden, an advanced country in periodontal treatment. At the initial examination, a basic periodontal check is conducted to assess gum inflammation, disease progression, and tooth mobility, after which the treatment of the chief complaint is prioritized on the same day. Periodontal treatment involves tartar removal, stain removal, and tooth surface cleaning, followed by plaque control guidance provided by nationally certified dental hygienists, including toothbrushing instructions and lifestyle guidance based on saliva measurements, bacterial counts, and pH levels. A second periodontal examination is performed to continue treating affected areas, and treatments such as cavity treatment, dentures, and implants are also provided in parallel. Regular check-ups are conducted every six months or one year, continuing treatment for areas that cannot be reached with toothbrushes or interdental brushes. The clinic is closed on Thursdays, Sundays, and holidays, as well as during the New Year period and mid-August. English services are available, and credit cards, electronic payments, and parking are available.