  The radiative neutrino mass model with inert doublet dark matter is a
promising model for the present experimental issues which cannot be explained
within the standard model. We study an extension of this model focusing on
cosmological features brought about from the scalar sector. Inflation due to
singlet scalars with hierarchical non-minimal couplings with the Ricci scalar
may give a favorable solution for both neutrino masses and baryon number
asymmetry in the Universe.
