Abstract:I present the results from state-of-the-art computer simulations of cosmic structure formation. An array of recent observations established the standard cosmological model, in which the universe is dominated by two misterious substances called dark matter and dark energy. I first describe how rich structures such as stars and galaxies are formed out of tiny density ripples left over from the Big Bang. The planned wide- field survey programmes such as HSC, LSST and satellite missions Euclid, WFIRST will deliver enormous data on the distribution and evolution of galaxies from early to late cosmic epochs, which will enable us to extract information on the nature of dark matter and dark energy. I present our combined approach of big data analysis and supercomputing cosmology toward the era of the large surveys. Finally, I discuss the future prospects for probing one of the final frontier of astronomy - Dark Ages- using next generation telescopes.