Yoshii Clinic is an internal medicine clinic located in Naka-ku, Hamamatsu City, Shizuoka Prefecture, equipped with parking and barrier-free facilities. In addition to internal medicine services, the clinic provides influenza and COVID-19 vaccinations, with influenza vaccinations starting from October 1, 2025. Vaccinations and health checkups are by appointment starting at 2:30 PM, and the influenza vaccine costs 3,900 yen per dose, with two doses recommended for ages 6 months to 12 years. Public coverage applies to Hamamatsu City residents aged 65 and older. The clinic also treats lifestyle-related diseases such as hypertension, hyperlipidemia, diabetes, and metabolic syndrome, as well as patients with proteinuria or hematuria. Access routes include heading east from the 'Yoshinsho-mae' intersection on Kasai Street, or public transportation via Entetsu Bus from Hamamatsu Station to the JA Kagami Branch followed by a 15-minute walk. Online booking is also available.