The Optics and Photonics International Congress (OPIC) 2024 is co-organized with the Optics and Photonics International Exhibition (OPIE) and brings together researchers and developers from around the world to discuss the science and industry of optics and photonics. It is held every year for the purpose of observing state-of-the-art achievements and disseminating the guidelines for the future society enabled by science and technology. It has established itself as a significant international conference originating in Japan, with new specialized international conferences added each year and an increasing number of participants. OPIC currently comprises Specialized International Conferences covering a broad range of fields: lasers, biomedicine, nano-photonics, optical measurement, optical manipulation, x-ray optics, IoT, display and lighting, high energy density science, power transmission, and space and earth science. By hosting various optics-related technical conferences in one location based on common elemental technologies and sharing supply and demand across various fields, OPIC has accelerated the development and application of these technologies. It has evolved into one of the largest international conferences, providing an efficient platform for participants to interact on the latest advances in the science and technology of optics, photonics, and their applications.