In Thailand, where power generation demand is growing, Mitsubishi Heavy Industries, Ltd. (MHI) has constructed three sites of highly efficient gas turbine combined cycle (GTCC) power plants with state-of-the-art M701JAC gas turbines (manufactured by MHI) as a full turnkey project. MHI has completed all ten units (6,700 MW in total) on schedule. Starting with the operation of the first unit in March 2021, actual operating hours of these ten M701JAC gas turbines have been accumulated 140,000 hours, demonstrating high reliability. In addition, MHI has concluded a 25-year, long-term maintenance service agreement (LTSA) for these GTCC power plants, and will continue to contribute to the highly efficient and reliable energy supply in response to the electricity demand in Thailand.