Power and Energy Systems Engineering is a rapidly evolving field that is at the forefront of meeting the world's growing energy demands. With advancements in technology and increasing concern for sustainability, the field has expanded beyond traditional power generation and transmission to include renewable energy systems, energy storage solutions, and smart grid infrastructure. In recent years, there has been a significant focus on enhancing the efficiency and reliability of power and energy systems while reducing their environmental impact. Based on the success of previous CPESE events, we are proud to bring to the Japan again, 2025 the 12th International Conference on Power and Energy Systems Engineering (CPESE 2025). The conference will be held in Fukuoka, Japan during September 12th-14th, 2025. CPESE is the premier Power and Energy Systems Engineering conference, providing a forum for researchers, practitioners and educators to present and discuss the most recent innovations, trends, experiences and concerns in the field of Power and Energy Systems Engineering. CPESE is an annual conference series since 2014 and initiated by Chongqing University, China. CPESE 2025 is sponsored by University of Kurdistan, Iran.