A G20 Resource Efficiency Dialogue was decided to establish at the G20 summit in Hamburg, Germany, on 7-8 July 2017 by the G20 members. The key aim of this Dialogue is to make the efficient and sustainable use of natural resources a core element of the G20 talks. Since the establishment in 2017, the G20 members and related stakeholders have advocated a resource-efficient and sustainable global economy and promote sustainable consumption and production patterns among and beyond the G20 in order to achieve the global Sustainable Development Goals (SDGs), combat poverty, take climate action and protect the environment. In light of these achievements in Germany 2017, the G20 Resource Efficiency Dialogue was held in Tokyo, Japan, on 9-10 October 2019 under the Japanese presidency. As a result, it was agreed to launch a website for the G20 Resource Efficiency Dialogue to ensure timely and regular sharing of information as mentioned in the Roadmap for the G20 Resource Efficiency Dialogue. Based on this agreement, this portal site was prepared and launched with the support of the Ministry of the Environment, Japan. The page visitors can regularly and easily access to the key documents or information related to G20 Resource Efficiency.