Koshijima Clinic, located in Iwato Kita, Koganei City, Tokyo, is a community-based medical facility specializing in internal medicine. The clinic actively incorporates the latest medical equipment, including NIOX VERO for measuring fractional exhaled nitric oxide concentration—an indicator of eosinophilic airway inflammation such as asthma—as well as Fuji Dry Chem IMMUNO AG1, which enables high-sensitivity detection of mycoplasma, streptococcus, and influenza from early stages of onset, and Sertac α, a fully automated hematology analyzer useful for identifying pneumonia and acute abdominal conditions. Additionally, through collaboration with Teijin Pharmaceutical, the clinic has introduced testing equipment for sleep apnea syndrome, enabling simple home-based examinations. In addition to insurance-covered smoking cessation guidance, the clinic offers self-pay treatment options including placenta injections, garlic injections, and vitamin C injections, as well as AGA treatment prescriptions. Consultation hours are from 9:00 AM to 12:00 PM and 3:00 PM to 6:00 PM, with Tuesday until 5:00 PM and Saturday until 1:00 PM. The clinic accepts various credit cards and electronic payments, and is equipped with parking and barrier-free facilities, creating an accessible environment for a wide range of patients.