The Regional Workshop on Protecting Coastal and Marine Ecosystems from Land-Based Activities in the Asia-Pacific, held in Toyama, Japan, was a follow-up activity for the implementation of the Regional Programme of Action for the Protection of the Marine Environment of the East Asian Seas from the Effects of Land-based Activities. This workshop was the fourth in a series of regional consultative meetings on wastewater management. These meetings are jointly organised by the GPA Coordination Office and the Regional Coordinating Units of the UNEP Regional Seas Programme.