  We investigate the nuclear and the quark matter at finite real chemical
potential ($\mu_\mathrm{R}$) and low temperature from the viewpoint of the
canonical sectors constructed via the imaginary chemical potential region.
Based on the large $N_\mathrm{c}$ estimation, where $N_\mathrm{c}$ is the
number of color, we can discuss the confinement-deconfinement nature at finite
$\mu_\mathrm{R}$ from the canonical sectors. We found the expectation that the
sharp change of canonical sectors at $\mu_\mathrm{R} \sim
M_\mathrm{B}/N_\mathrm{c}$, where $M_\mathrm{B}$ is the lowest baryon mass, is
happen in the large $N_\mathrm{c}$ regime, and it is matched with the
quarkyonic picture. In addition, we discussed the color superconductivity and
the chiral properties from the structure of canonical sectors. Even in the
present anatomy from the canonical sectors, we can have the suitable picture
for the dense QCD matter.
