Over the last two decades, Original-Equipment-Manufacturers' supply chains have reached a critical dimension in worldwide dispersion and depth. Recent events such as the COVID-19 crisis, the Suez Canal blockage, and the world's semiconductors shortage have highlighted the critical importance of supply chain management. As the founder of lean production and Just-In-Time, Toyota has achieved the highest manufacturing efficiency. The company has identified supply chain mapping as the next step to achieve competitive advantage through better control and vision of the value chain. Moreover, continuously improving its sourcing by having high standards for a clean supply chain, Toyota Motor Europe strives to improve its due diligence by monitoring the supply chain to clear it from environmental and human rights-related issues.