The Illuminating Engineering Institute of Japan (IEIJ) will change to a general incorporated association next year. The new organization will comply with the new act on public interest corporations. Based on our new vision following changes in social needs and technical developments, IEIJ reformed its organization greatly, such as by introducing special interest group (division) systems, in order to establish new lighting science. This article describes how such reformations were achieved, and gives the outline of the new organization and expectations for the new and improved IEIJ.