A statistical weak-lensing study for clusters, based on the exquisite Subaru Hyper Suprime-Cam (HSC) lensing data, measures properties of the dark matter distribution in clusters in great detail, such as spherically averaged radial profiles, halo shapes, subhalo masses, and their redshift evolutions. It enables us to make a stringent test of the CDM structure formation scenarios on small scales. I am very interested in these lensing studies as well as the interplay between dark matter and baryons based on multiwavelength data-sets.