  Baryon asymmetry of the Universe is evaluated in the model originally
proposed in Phys. Rev. Lett. 102 (2009) 051805, where Majorana masses of
neutrinos are generated via three-loop diagrams composed of additional scalar
bosons including the dark matter candidate which is odd under an unbroken $Z_2$
symmetry. In order for the model to include multiple CP-violating phases, we do
not impose the softly broken $Z_2$ symmetry imposed in the original model to
avoid the flavor-changing neutral current at tree level. Instead, for
simplicity, we assume the flavor alignment structure in the Yukawa
interactions. We also simply assume the alignment structure in the Higgs
potential so that the Higgs couplings coincide with those in the SM at tree
level. Under these phenomenological simplifications, the model still contains
multiple CP-violating phases. By using destructive interferences among them, it
is compatible with the stringent constraint from the electric dipole moment
measurements to generate the observed baryon asymmetry along with the scenario
of electroweak baryogenesis. We show a benchmark scenario which can explain
neutrino mass, dark matter and baryon asymmetry of the universe simultaneously
and can satisfy all the other available experimental data. Some
phenomenological predictions of the model are also discussed.
