  We propose a realistic 5D orbifold GUT model that can reduce to natural (or
radiative natural) supersymmetry as the low energy effective theory.
Supersymmetry as well as gauge symmetry are broken by the twist boundary
conditions. We find that it is non-trivial to introduce other flavor symmetry
other than the $SU(2)_R$ R-symmetry. We ameliorate the tension between the
small number of free parameters and the successful electroweak symmetry
breaking by introducing non-minimal Kahler potentials. A large trilinear term
$A_t$, which is necessary to give a 125 GeV Higgs boson, is naturally provided
in our scenario. A scan under current experimental constraints shows that our
model can realize natural (or radiative natural) supersymmetry. Only radiative
natural supersymmetry can naturally lead to 125 GeV higgs. Additional dark
matter species other than neutralino(like axion) are needed to provide enough
relic density. Relatively large stop masses are necessary to give realistic
higg mass in most of the parameter spaces.
