The PCST Symposium 2025 Tokyo, Japan, will bring together researchers, practitioners, lecturers, and other scholars in and around science communication to discuss the strategic development of science communication and public engagement across Asia. With a focus on non-Western contexts, this symposium aims to highlight innovative research and practices that address the region's unique challenges and opportunities in fostering sustainable science communication ecosystems. The discussions will centre on how to professionalise science communication, enhance education and training, and bridge the gap between research and society. While the symposium focuses on Japan and the wider Asia region, it welcomes participants from the West and other regions to share their work and engage in discussions about making it relevant to non-Western contexts. Special attention will be given to addressing multilingual communication, cultural contexts, and regional media landscapes, ensuring that science communication is inclusive and relevant to diverse publics across Japan and the Asia region.