Dear Participants, Welcome to the International Experts Summit on Quantum Computing and Applications (Quantum Summit-2027), which will be held from April 08–10, 2027, in Osaka, Japan. Quantum Summit-2027 brings together researchers, academics, industry professionals, and technology leaders from around the world to discuss recent developments, emerging trends, and practical applications in quantum computing and related technologies. The summit provides an opportunity to exchange knowledge, present innovative research, foster interdisciplinary collaboration, and engage with experts contributing to the advancement of quantum science and technology. We look forward to a productive and engaging program featuring insightful presentations, technical discussions, and valuable networking opportunities. We also hope you enjoy your time in Osaka, a city renowned for its rich cultural heritage, scientific excellence, and technological innovation. We wish you a successful and rewarding experience at Quantum Summit-2027.