The Department of Human and Social Systems conducts studies on architecture, infrastructure facilities, and urban, regional and global environments as human beings' social activity field. The fields of research from urban scale to regional or planet earth scale are dynamic containers, which house not only humans but also other forms of life, interacting with human behavior and activities. These fields require various factors for convenience, comfort, sustainability, and safety. This department focuses on these issues from the multiple aspects of engineering, natural environment, society, economy, and culture.