“…An investigation of health conditions of workers performed by the Ministry of Health, Labor, and Welfare has shown that the stress of workers in Japan has increased, and that the percentage of workers with "severe anxiety, troubles, and stress in their work and occupational life" increased from 50.6% in 1982 to 61.5% in 2002. In overseas reports, anesthesiologists have also been found to have more stress than other physicians [12,13], with the reasons for such severe stress including less satisfaction in their work, long working hours, on-call work, fear of court cases, and problems with relationships with physicians in other departments [14][15][16]. An investigation performed by the American Society of Anesthesiologists in 1991 indicated that the greatest stress was caused by on-call work at night, in addition to stress due to the requirement for anesthesia for patients at high risk, work responsibilities, and a heavy workload [17].…”