Takeo Kato is an associate professor of Mechanical Engineering at Keio University, Japan. He is also an executive board member of the Japanese Society for the Science of Design, the Japan Society for Design Engineering, and the Japan Society of Kansei Engineering. His research focuses on the design theory and methodology to improve the quality and efficiency of product development and the product design that applies them. His research topics include generative design of curve/curved surfaces; affective/Kansei state estimation using NIRS, EDA, and cardiography; robust/set-based design; creativity support tools; and ergonomic design of welfare devices.