In the coming decade, Southeast Asian is expected to be a story of strong growth. Driven by strong economic growth, a rapidly growing population and developing middle-class, power demand in the region is set to double by the end of 2040. While coal is set to remain a strong player in the fuel mix due to cost-competitiveness, renewables and gas will grow their shares, particularly post-2030 as the cost of renewables see sharp declines. Overall gas demand is set to expand by more than 60% to 24 bcfd by 2040. While gas demand continues to grow, the outlook of gas supply in the region remains largely constrained as many of the mature fields are going into decline. Southeast Asian countries are expected to import more than 100 mmtpa of LNG by 2040. To facilitate these imports, substantial investments will be required in regas capacity. This report provides a comprehensive overview of key changes and developments in 7 key Southeast Asian gas and power markets.