As we are beginning to transition towards a carbon neutral society, large reforms to our transportation systems, starting with the automobile, must be adopted. There are continuing improvements to the manufacturing and supply chains of sustainable alternate fuels such as hydrogen, bio-fuels, e-fuels, and ammonia due to recent developments on hybrid, electric, and fuel-cell based cars. Alongside this, efforts to innovate new technologies related to the never-ending pursuit of increasing efficiency and decreasing emissions of internal combustion engines considering the future adoption of alternative fuels are being pursued. This symposium, organized by the Society of Automotive Engineers of Japan, will be held exclusively in person for the first time in four years. Researchers, engineers, and students belonging to universities, national institutes, and various industries will gather to present on topics related not just to automobile internal combustion engines, but also aircraft gas turbine engines, as well as ship engines, general use engines, and any other type of internal combustion engine. This symposium will feature presentations ranging from fundamental topics to state-of-the-art research and development which in turn will allow for the exchange of ideas and inspire novel research and development which can solve problems pertinent to the field of internal combustion engines.