Many companies participating in the Science Based Targets (SBT) Initiative and RE100 cite enhanced stakeholder confidence, reduced risk posed by regulations, increased profitability and competitiveness, as well as increased innovation as their primary motivations. A calculation of supply chain emissions is required. CFP/GHG emissions calculation can be done either by a cloud-based platform or by individual consulting services. The leader of the calculation service is an intermediary organization that has been accumulating expertise having been commissioned by the Japanese government to do so. It has been emphasizing the creation of various networks since the early stage of the project. The diffusion of this service to the industry as a whole will require the use of a cloud-based platform. The ease-of-use of cloud-based platforms and the enhancement of databases are necessary for the diffusion of this service throughout the industry. The standardization of data format and cross-industry data sharing are necessary to view the entire supply chain. Digital technology is a key factor in its success.