  We present a complete set of decay rates of the Higgs boson with the mass of
125 GeV at the full next-to-leading order in a variety of extended Higgs
models; i.e., a model with an additional real singlet scalar field, four types
of two Higgs doublet models and the inert doublet model. All the one-loop
contributions due to QCD and electroweak interactions as well as scalar
interactions are taken into account, and the calculations are systematically
performed. Branching ratios for all the decay modes are evaluated in these
models, and patterns of deviations in each decay mode from the standard model
predictions are comprehensively analyzed. We show how these models with
extended Higgs sectors can be distinguished by using our calculation of the
branching ratios and future precision measurements of the Higgs boson decays.
