Yamakawa ENT Clinic, operated by Shuwakai Medical Corporation, is an ear, nose, and throat clinic located in Wakamatsuhara, Utsunomiya City, Tochigi Prefecture. The clinic provides English-language services and has parking facilities with barrier-free access. It offers sublingual immunotherapy with Citaquil for cedar pollen allergy, and initial treatment bookings can only be made by visiting the clinic. Influenza vaccinations are also available, using a system where patients simply check in during designated hours without reservations. Vaccination fees vary by age and residence, with subsidies available for Utsunomiya City residents aged 65 and above. Allergy testing includes the Drop Screen test using fingertip blood samples, which can check for 41 allergens including pollen and food allergies. This test places less burden on patients compared to arm blood draws and takes 30 minutes, conducted one person at a time. The clinic will be closed from the afternoon of December 27th to January 4th for the year-end and New Year holidays, resuming regular operations on January 5th.