We present the status of our study on the equation of state in 2+1 flavor QCD
with non-perturbatively improved Wilson quarks coupled with the RG improved
glue. We apply the T-integration method to non-perturbatively calculate the
equation of state by the fixed-scale approach.Comment: 7 pages, 7 figures, talk presented at the XXVIII International
Symposium on Lattice Field Theory, June 14-19 2010, Villasimius, Ital