  We have measured, with electron tagging, the forward-backward asymmetries of
charm- and bottom-quark pair productions at $<\sqrt{s} >$=58.01GeV, based on
23,783 hadronic events selected from a data sample of 197pb$^{-1}$ taken with
the TOPAZ detector at TRISTAN. The measured forward-backward asymmetries are
$A_{FB}^c = -0.49 \pm 0.20(stat.) \pm 0.08 (sys.)$ and $A_{FB}^b = -0.64 \pm
0.35(stat.) \pm 0.13 (sys.)$, which are consistent with the standard model
predictions.
