The HSC survey allows us to address a wide range of scientific questions, but our primary science goals are

1. weak-lensing cosmology: Through weak-lensing analysis, we study the dark matter distributions in the Universe, probe the growth of structure over a wide redshift range, and constrain the nature of dark energy. The superb image quality of HSC and the deep imaging data make this science possible.
2. high redshift galaxies: We study the clustering of Lyman break and Lyman alpha emitters as well as their luminosity functions with an unprecedented statistical accuracy using the deep and wide data from HSC in order to gain deeper insights into the formation of galaxies in the early Universe.
3. galaxy evolution over the cosmic time: We have enough volume and depth to track down the evolution of galaxies over the cosmic time by combining the three survey layers. We address long-standing problems such as the physics of mass assembly, quenching, and relationship between galaxies and dark matter out to high redshifts.

In addition to the three major goals, we aim to address many other important scientific questions. We discuss our science goals in more detail in the following pages: