The 26th International Conference on Nuclear Tracks in Solids provides a platform to present and exchange recent achievements on the fundamental and applied research of nuclear tracks, including that in etched track detectors and nuclear emulsion. The scope of this conference covers various branches of science and technology such as space radiation, nuclear physics, nuclear chemistry, neutron dosimetry, heavy ions, radon, radiation biology, geology and dating, laser driven particle acceleration and track nanotechnology. The formation process of tracks in solids is also a research topic that has been investigated from the viewpoint of radiation physics, radiation chemistry and simulation. This is a unique international conference where attendees from many different fields will come together to discuss on the fundamental principles and applications of nuclear tracks, which has a long history established in 1957. This Conference is jointly organized by the International Nuclear Track Society and Kobe University, which is also supported by the Ionizing Radiation Division (The Japan Society of Applied Physics) and the Japan Society of Nuclear Track Detectors.