Located in Toyooka, Iruma City, Saitama Prefecture, Hasegawa Clinic is situated just a 4-minute walk from Iruma City Hall. The clinic primarily provides internal medicine services, specializing in cardiology, diabetes care, and the examination and treatment of sleep apnea syndrome. In the field of cardiovascular diseases, the clinic offers specialist-led treatment using diagnostic methods such as 24-hour Holter ECG and treadmill exercise testing. Diabetes treatment ranges from oral medications to insulin injections, with continuous glucose monitoring also available. Building on this expertise, the clinic provides allergy treatment through sublingual immunotherapy, as well as fee-based services including various injections and prescriptions for hair loss prevention. For health checkups, the clinic covers specific health screenings for Iruma City residents, various cancer screenings, pre-employment health exams, and medical certificate issuance. Vaccination services are comprehensive, ranging from routine childhood immunizations to adult shingles and pneumococcal vaccines, as well as pre-travel vaccinations. As a travel medicine specialist, the clinic also prescribes medications for altitude sickness prevention. This medical facility, providing comprehensive internal medicine services, offers high convenience to users by accepting credit cards, debit cards, and electronic payments. In addition to equipment such as parking and barrier-free accessibility, English-speaking support is also available. Note that acceptance of new patients has been temporarily suspended since February 2026.