The ICO (International Commission for Optics) General Congress has been one of the most historic and authoritative conferences in the field of optics and photonics since the 1st congress was held in the Netherlands in 1948. Following ICO-13 in Sapporo in 1984, in 2017 Japan will once again host ICO-24: which is to be held at the Keio Plaza Hotel, Shinjuku, Tokyo, from August 21st to 25th. With attendees and delegates from all over the world, ICO-24 will include a wide range of topics on optics and photonics, providing a platform for mutual communication between researchers of different fields linked with the main common theme of â€œLight for Societyâ€. Since the invention of lasers, the field of optical science has expanded to incorporate quantum and nonlinear optics, photonics, nano-optics, semiconductor optical materials science, complex dynamics, quantum computing, etc., and has grown to have technological applications in communications, health, material processing, renewable energy generation, and energy saving. Optical imaging science also plays an important role in monitoring disaster risks and ecosystem changes due to global warming. ICO-24 will consist of plenary sessions, oral sessions, poster sessions, and various social events. The plenary session will feature speakers who will share their viewpoints on very relevant topics of present interest and also their visions and perspectives on future trends. A current list of the inspiring plenary speakers includes Prof. Hiroshi Amano (2014 Nobel Laureate, Nagoya Univ.), Prof. Hiroshi Kajita (2015 Nobel Laureate, The Univ. of Tokyo), Prof. Christopher Dainty (Imperial Col. London), and Prof. James Fujimoto (Massachusetts Inst. of Tech.).