The Ministry of the Environment, Japan and the Ministry of Natural Resources and Environment, Thailand co-organized the 15th WEPA Annual Meeting on 8 February 2020 and International Workshop on 6 February 2020 in Bangkok, Thailand. WEPA member states, WEPA advisory board members, and experts from both Japan and Thailand were attended the meeting. On the first day, the WEPA International Workshop was held focusing on the current situation, challenges and possible solutions on industrial wastewater management in WEPA countries. All WEPA member states presented updates on Water Environmental Governance and actively exchanged views at the Annual Meeting. At the meeting, compliance with industrial wastewater regulations was reconfirmed as a priority issue for member states to tackle in the fourth phase. Originally 13 counties were scheduled to attend the meeting; however, due to an outbreak caused by a novel coronavirus, 10 countries were participated in the meeting.