  The overlap fermion offers the considerable advantage of exact chiral
symmetry on the lattice, but is numerically intensive. This can be made
affordable while still providing large lattice volumes, by using coarse lattice
spacing, given that good scaling and localization properties are established.
Here, using overlap fermions on quenched Iwasaki gauge configurations, we
demonstrate directly that, with appropriate choice of negative Wilson's mass,
the overlap Dirac operator's range is comfortably small in lattice units for
each of the lattice spacings 0.20 fm, 0.17 fm, and 0.13 fm (and scales to zero
in physical units in the continuum limit). In particular, our direct results
contradict recent speculation that an inverse lattice spacing of 1 GeV is too
low to have satisfactory localization. Furthermore, hadronic masses (available
on the two coarser lattices) scale very well.
