  Cygnus-X is considered a region of interest for high-energy astrophysics,
since the Cygnus OB2 association has been confirmed as a PeVatron in the Cygnus
cocoon. In this research note, we present new high-resolution (16'')
$^{12,13}$CO(J=1$\rightarrow$0) and C$^{18}$O (J=1$\rightarrow$0) observations
obtained with the Nobeyama 45-m radiotelescope, to complement the Nobeyama
Cygnus-X Survey. We discovered 19 new C$^{18}$O clumps associated with the
star-forming regions DR-6W, DR-9, and DR13S. We present the physical parameters
of these clumps, which are consistent with the neighboring covered regions. We
confirm the clumpy nature of these regions and of a filament located between
DR6 and DR6W. These results strongly suggest that star formation occurs in
these regions with clumps of sizes $\sim$10$^{-1}$ pc, masses $\sim$10$^2$
M$_\odot$, and H$_2$ densities of $\sim$10$^4$ cm$^{-3}$.
