The Asia-Pacific Water Forum (APWF) was initially proposed by the participants during the 4th World Water Forum (WWF) Regional Preparatory Process that was coordinated by Japan Water Forum (JWF). At the 4th WWF,, regional documents coordinated by JWF and 5 sub-regional coordinators (Korea Water Forum, Global Water Partnership, (GWP) Southeast Asia, GWP South Asia, GWP CACENA, and the Pacific Islands Applied Geoscience Commission (SOPAC)) together with regional water stakeholders reported on the Asia-Pacific region’s formidable water related challenges