Hospitals cannot be made up of only doctors and nurses, but also various occupations such as pharmacists, inspection engineers, radiological engineers, registered dietitians, clerks, security guards, cleaners, and cooks. Also, hospitals need water, electricity, and gas, as well as the professional who maintain, who import food and drug, and who transport patients. Hospitals that involve many occupations cannot function as "hospitals" even if some occupations are absent in the event of a disaster. What does it take for a hospital to remain a "hospital" in the event of a disaster? We are thinking through a business continuity plan (BCP).