Hydrogen is emerging as a promising solution for decarbonizing power generation and ensuring energy security in the face of climate change challenges. While gas turbine combined cycle power plants are efficient, they still contribute to carbon emissions through the use of natural gas. To address this, companies like Mitsubishi Power are exploring the integration of hydrogen as an alternative fuel. The recent test conducted at Takasago Hydrogen Park, where a J-series gas turbine was fueled with a mix of 30% hydrogen, demonstrated the feasibility of using hydrogen in large-scale power generation. This successful test marks a milestone in the shift towards cleaner energy sources, with a vision of eventually powering gas turbines entirely with hydrogen. Such advancements highlight the growing importance of hydrogen in the energy transition, paving the way for a more sustainable and environmentally friendly power generation sector.