A single vehicle comprises as many as 20,000 to 30,000 parts, most of which automobile manufacturers purchase from suppliers. Therefore, to reduce the environmental impact of products throughout their lifecycles, automobile manufacturers need to cooperate with their suppliers. Honda set green purchasing guidelines for the procurement of materials and parts which have reduced environmental impact while making efforts to reduce the environmental impact directly caused by the company. Based on these guidelines, we are actively promoting green purchasing activities in strong cooperation with our suppliers, including asking them to acquire ISO 14001 certification.