  We construct a minimal calculable model of a light dilaton based on the
scenario where only top and Higgs sectors are involved in a quasiconformal
dynamics. The model consistently accommodates the electroweak precision tests
even when the Higgs boson is very heavy, thereby allowing one to consider the
possibility that the particle at around 125GeV, discovered at the LHC
experiments, is identified as the light dilaton rather than the Higgs boson. We
find that the current LHC data allow distinct parameter regions where the
observed particle is either mostly the Higgs boson or the dilaton.
