Holography, which is duality between QFT and gravity, is a fruitful arena for testing our understanding of quantum gravity, QFT and quantum information theory. The black hole information problem is also deeply involved in fundamental questions in the quantum nature of our spacetime. Our group aims at deep understanding of quantum field theory, quantum information, quantum gravity and black hole via holography. We will focus on strongly correlated systems and holographic duals thereof; quantum chaos and the application of random matrix theory; black hole physics; finite temperature QFTs and open quantum system; quantum gravity and higher spin AdS/CFT correspondence; irrelevant deformation of QFTs.