My research interest lies in observational cosmology, and my goal is to obtain various insights into fundamental physics through cosmological observations. I am currently focusing on the Baryon Oscillation Spectroscopic Survey in the Sloan Digital Sky Survey III, which provides us with the largest 3-dimensional galaxy map, in order to extract information on gravity theory at cosmological scales and the neutrino mass. Meanwhile, I have been working on the cosmic microwave background and gravitational wave.