Iwai FESS Clinic is a specialized medical facility located in Minami-Koiwa, Edogawa Ward, Tokyo, dedicated to spinal endoscopic surgery FESS. For spinal conditions including lower back and neck pain, we offer minimally invasive surgery using endoscopes with an outer diameter of approximately 7mm. FESS is an evolved surgical technique of PELD, capable of addressing not only lumbar vertebrae but the entire spine including cervical vertebrae, and treating conditions such as stenosis as well as herniation. The incision is approximately 7mm, and the hospital stay is 2-3 days. The entire Iwai Group has performed over 19,000 spinal endoscopic surgeries, accounting for about 10% of all FESS surgeries performed in Japan. Director Hisashi Koga performs more than 400 FESS surgeries annually and provides online consultations for patients from distant areas or those who have difficulty visiting the clinic. Additionally, the clinic offers English support, accepts credit cards and electronic payments, and is barrier-free, accommodating diverse patient needs.