Passive daytime radiative cooling (PDRC) is an innovative technology born from academic research with the potential to revolutionize cooling solutions. By reflecting sunlight and emitting thermal radiation directly into outer space, PDRC materials enable daytime cooling without energy consumption. This provides a swift and straightforward solution to both mitigating and adapting to global warming, contributing to the realization of a sustainable society. SPACECOOL has been at the forefront of this technological innovation, driving the development and commercialization of PDRC materials. This presentation will explore the journey of PDRC from research and development to real-world applications, showcasing SPACECOOL’s innovative approach to market implementation. Our proprietary PDRC film achieves cooling effects of 2–5 °C below ambient temperature under direct sunlight, even during humid Japanese summers. Unlike traditional cooling methods, it requires no external energy or refrigerants, significantly reducing greenhouse gas emissions and energy consumption. The transition from laboratory-scale research to scalable production posed challenges, such as material durability, manufacturability, and market acceptance. SPACECOOL overcame these hurdles through robust design, feedback from extensive field testing, and strategic partnerships with industry stakeholders. Today, SPACECOOL’s PDRC film is applied in diverse sectors, including building materials, transportation, and industrial processes. Pilot projects in arid regions have also demonstrated reduced energy demand incase combined with active cooling. Furthermore, SPACECOOL is exploring new strategic partnerships and business models to accelerate the global adoption of PDRC. By sharing our journey, we aim to inspire further advancements and collaborations in sustainable cooling technologies, contributing to a more sustainable future.