The 15th International Conference on Optics-photonics Design and Fabrication, ODF’26, will take place from June 3 to 5, 2026, at the Toyama International Conference Center in Toyama, Japan. The conference is a global forum dedicated to advances in optics-photonics design, simulation, fabrication, and testing, bringing together researchers, scientists, engineers, and industry professionals from across the photonics community. Attendees will have the opportunity to explore the latest developments in optical components, imaging systems, optical devices, waveguides, coatings, laser technologies, and emerging photonics applications through technical presentations, discussions, and networking sessions.