アブストラクト：
"Dust Obscured Galaxies (DOGs) are a subset of high-redshift (z~2) optically-faint ultra-luminous infrared galaxies (ULIRGs). Recently, some works have reported that the brighter mid-infrared DOGs are more AGN-dominated, and indicated that black holes in the IR-bright DOGs are expected to show the highest accretion rate during a major merger event. In addition, some works reported that IR-bright DOGs tend to reside in richer environments than fainter ones, and the most luminous DOGs may evolve into brightest cluster galaxies. Therefore, particularly IR-bright DOGs are expected to be a crucial population in terms not only of the co-evolution of galaxies and supermassive black holes (SMBHs) but also of structure formation. Combining the early data of the HSC-SSP (S15B), VIKING DR2 near-IR, and WISE (ALLWISE) mid-IR data, we are searching the IR-bright DOGs. In this presentation, we will report the statistical properties of DOGs such as luminosity function, luminosity density, and clustering properties (Toba et al. 2015, 2016 in prep.)."