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We present preliminary results of the PACS-CS project which simulates 2+1flavor lattice QCD toward the physical point with the nonperturbativelyO(a)-improved Wilson quark action and the Iwasaki gauge action. Calculationsare carried out at beta=1.9 on a 32^3x64 lattice with the use of thedomain-decomposed HMC algorithm to reduce the up-down quark mass. The resultingpseudoscalar meson masses range from 730 MeV down to 210 MeV. We discuss thephysical results including the chiral analysis in the pseudoscalar meson sectorand the hadron spectrum. Some algorithmic issues are also discussed.

Nf=2+1 dynamical Wilson quark simulation toward the physical point