Reflections of NS5 branes

We study complex structure monodromies of certain Calabi-Yau fibrations and find evidence that they are mirror to Calabi-Yau manifolds with NS5 brane on a divisor. This gives a simple way to construct mirrors to any Calabi-Yau hypersurface with NS5 branes wrapped on divisors and a complementary interpretation of some recent calculations in open string mirror symmetry.