  We present a study of the expected precision for measurement of the top
Yukawa coupling, yt, in e+e- collisions at a center-of-mass energy of 1 TeV and
assuming a beam polarization of P (e-, e+) = (-0.8,+0.2). Independent analyses
of ttH final states containing at least six hadronic jets are performed, based
on detailed simulations of SiD and ILD, the two candidate detector concepts for
the ILC. We estimate that a statistical precision of yt of 4% can be obtained
with an integrated luminosity of 1 $\mathrm{ab}^{-1}$.
