Hayashi Clinic is a pediatric and allergy clinic located in the Medical Plaza in Iragawa, Sayama City, Saitama Prefecture. The clinic provides general pediatric care and allergy treatment, and also offers vaccinations and infant health checkups. They perform respiratory treatments including nebulizer bronchodilator administration and nasal aspiration. The clinic is equipped with a densitometry analyzer and supports rapid testing for Mycoplasma, Streptococcus, adenovirus, rotavirus, and influenza. Routine vaccinations available include Hib, pneumococcal, rotavirus, hepatitis B, BCG, DTaP, MMR, varicella, Japanese encephalitis, and HPV vaccines. The influenza vaccine requires two doses for ages 6 months to elementary school, and one or two doses for ages 13 and above. The mumps vaccine is recommended as two doses. Infant health checkups cost 5,000 yen, and preschool entrance checkups cost 3,000 yen. Online appointment booking is available, with instructions for first-time users. As the clinic does not have inpatient facilities, cases requiring hospitalization are coordinated with local core hospitals. Parking is available, and the facility is barrier-free. English support is provided, along with assistance in other languages.