This report compares Green Public Procurement (GPP) programs from four leading Asian countries (China, Japan, Korea and Thailand) to understand what the frameworks and key success factors that result in high-impact green and sustainable procurement are. It looks at their commonalities and differences with the goal of informing a more effective implementation of green procurement policies and programs across Asia. It will be beneficial for other countries in the early stages of promoting and implementing green public procurement, and it will give practitioners insights into the tools and approaches used to implement and promote it.