The day surgery system was established in order to satisfy the demand of healthy patients, and we have performed more than 40 types of operation under this system so far. The critical path is an indispensable tool for ensuring safety and efficiency, and the care coordinator is the key person to manage the system for that purpose. In addition, the cost management technique focusing on DRG/PPS and risk management to increase patient satisfaction are particularly important because we must manage numerous surgical cases. The day surgery system is evaluated in relation to the primary education program for surgeons. Such education not only impacts medical and surgical skills, but also is a good opportunity for training in the basic bedside manner to offer the best service to patients.