  Recently T2K gives hint in favor of large reactor angle. Most of the models,
with tri-bimaximal mixing at the leading order, can not reproduce such a large
mixing angle since they predict typically corrections for the reactor angle of
the order of the Cabibbo angle. In this letter, we discuss the possibility to
have large reactor angle within the T2K region with maximal atmospheric mixing
angle and trimaximal solar mixing angle, through the deviation from
tri-bimaximal. We derive the structure of neutrino mass matrix that leads to
the large reactor angle leaving maximal atmospheric angle and trimaximal solar
angle. It is shown that such a structure of neutrino mass matrix can arise in a
model with S4 flavor symmetry.
