Quantum information theoretic ideas, such as quantum entanglement, have recently played very important roles in various subjects of theoretical physics. In condensed matter physics, the entanglement entropy and spectrum have been successfully employed as quantum order parameters of many-body systems with complicated ground states such as those in topological phases. In particle physics, basic properties of the entanglement entropy have revealed fundamental aspects of quantum field theories such as the C- and F-theorem. In string theory and general relativity, we can interpret the entanglement entropy geometrically in the light of holographic principle. Moreover, it has been suggested that the mechanics of AdS/CFT correspondence can be understood as that of entanglement renormalization, a special example of tensor networks.　These suggest that spacetimes in gravity may emerge from bits of quantum entanglement. In addition, recent progresses on the black hole information problem tell us that quantum information theory will provide crucial ideas to understand quantum gravity.
　　To explore these various interesting directions, we would like to enhance entangled discussions among researchers in quantum information theory, condensed matter physics and string theory during this conference. This conference will be held during the YITP long term workshop ``Quantum Information in String Theory and Many-body Systems''.
　　YKIS 2016 conference is financially supported by Yukawa Memorial Foundation.