  The notion of coK\"{a}hler manifolds (resp. 3-cosymplectic manifolds) is an
odd-dimensional analogue of the one of K\"{a}hler manifolds (resp.
hyperK\"{a}hler manifolds). In this paper, we obtain reduction theorems of
coK\"{a}hler manifolds and 3-cosymplectic manifolds. We prove that K\"{a}hler
and coK\"{a}hler reductions have a natural compatibility with respect to cone
constructions, that is, the coK\"{a}hler quotient of the cone of a K\"{a}hler
manifold (resp. the K\"{a}hler quotient of the cone of a coK\"{a}hler manifold)
coincides with the cone of the K\"{a}hler quotient (resp. the cone of the
coK\"{a}hler quotient). We also show that hyperK\"{a}hler and 3-cosymplectic
reductions admit the compatibility with respect to cone constructions. We
further prove that the compatibility of K\"{a}hler and coK\"{a}hler reductions
with respect to mapping torus constructions also does hold.
