  Precision measurement of the integrated luminosity $\mathcal{L}$ at future
Higgs factories, including ILC, is of crucial importance for the cross-section
measurements, and in particular for the line-shape measurements at the Z-pole.
Since there is no up-to-date estimate of the integrated luminosity
uncertainties arising from metrology effects at ILC, here we review a
feasibility of the targeted precision of $\mathcal{L}$ at foreseen ILC
center-of-mass energies: 91.2 GeV, 250 GeV, 500 GeV and 1 TeV.
