Low mass Higgs and Higgs properties at the LHC

The discovery of the Higgs boson is one of the most important studies at the LHC to understand a mechanism of the electroweak symmetry-breaking and an origin of a mass. We present results of H to tautau and H to gammagamma analysis based on the latest simulation with 14TeV center of mass energy at the LHC. The mass region of these channels is around 110-150GeV, that is preferred by the existing precision and direct measurements (LEP, Tevatron and so on). We also briefly show the result of couplings measurement.