This research focuses on Nippon Life, which has been actively computerized since the first half of 1900 and has achieved dramatic growth, and explores the construction of information systems in organizations. Specifically, we will explore the history of informatization of Nippon Life, the introduction of equipment, business management, organizational expansion, and organizational change methods, and about organizational informatization and organizational changes so that they can be hints for organizational change in modern companies. To clarify. In the current management, the utilization of information technology is indispensable to maintain the organization smoothly, but it is necessary to continue to use the same system and to accurately grasp the external environment and management problems and introduce the technology. Otherwise, it will not lead to good organizational maintenance. Against this background, I would like to explore the rules for corporate organizations to adapt to the future artificial intelligence society.