  We discuss an extra source of CP and flavor violations in supersymmetric
SU(5) grand unified model with the right-handed neutrinos. In such a model, the
right-handed down-type squarks \tilde{d}_R interact with the right-handed
neutrinos above the GUT scale, and the renormalization group effect can
generate sizable off-diagonal elements in the mass matrix of \tilde{d}_R.
Because of new Yukawa phases which exist in the SU(5) model, these off-diagonal
elements have, in general, large CP violating phases. The renormalization group
induced off-diagonal elements affect the K and B decays. In particular, in this
model, supersymmetric contribution to the \epsilon_K parameter can be as large
as the currently measured experimental value, and hence the effect might be
seen as an anomaly in the on-going test of the Cabibbo-Kobayashi-Maskawa
triangle.
